The coronavirus disease 2019(COVID-19)pandemic caused by frequently mutating severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)has had a worldwide impact.However,detailed data on the potential aerosol transmi...The coronavirus disease 2019(COVID-19)pandemic caused by frequently mutating severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)has had a worldwide impact.However,detailed data on the potential aerosol transmission of SARS-CoV-2 in real-world and controlled laboratory settings remain sparse.During the COVID-19 pandemic in Shanghai,China in 2022,samples were collected in a Fangcang shelter hospital,a large-scale temporary hospital rapidly built by converting the existing National Exhibition and Convention Center(Shanghai)into a health care facility.Aerosol samples at different sites and intervals around patients and in public areas,surface samples,and pharyngeal swab samples from corresponding patients were included.Samples were tested for SARS-CoV-2 using real-time quantitative polymerase chain reaction(RT-qPCR)assays,followed by sequencing if the cycle threshold(Ct)value was<30.The positivity rate for SARS-CoV-2 in aerosol samples was high in contaminated zones(37.5%,104/277),especially around the bed(41.2%,68/165)and near ventilation inlets(45.2%,14/31).The prevalence of SARS-CoV-2 around the bed,public areas,and air inlets of exhaust vents fluctuated and was closely related to the positivity rate among patients at corresponding sampling sites.Some surface samples of different personal protective equipment from medical staff had high positivity rates.Sixty sequences of joined ORF1ab and spike genes obtained from sixty samples represented two main clusters of Omicron SARS-CoV-2.There was consistency in virus sequences from the same patient and their environment,and the detected virus sequences matched those of virus strains in circulation during the collection periods,which indicated a high likelihood of cross-contamination in the Fangcang shelter hospital.In summary,the results provide a quantitative and real landscape of the aerosol transmission of SARS-CoV-2 and a patient-centered view of contamination in large and enclosed spaces and offer a useful guide for taking targeted measures to avoid nosocomial infections during the management of SARS-CoV-2 or other respiratory virus diseases in a Fangcang shelter hospital.展开更多
The construction of artificial shelter forests(ASFs)has resulted in substantial ecological,economic,and societal benefits to the Chinese Loess Plateau(CLP).However,the health and benefits of ASFs are being increasingl...The construction of artificial shelter forests(ASFs)has resulted in substantial ecological,economic,and societal benefits to the Chinese Loess Plateau(CLP).However,the health and benefits of ASFs are being increasingly threatened by the formation of low-efficiency artificial shelter forests(LEASFs).In this study,LEASFs are systematically analyzed in terms of their status,formation mechanisms,and developmental obstacles.The key restoration techniques and schemes were summarized to improve the quality and efficiency of LEASFs.LEASFs are formed by relatively complex mechanisms,but they arise mainly due to poor habitat conditions,improper tree species selections,mismatch between stands and habitat,extensive forest management measures,and human interferences.The restoration and improvement of LEASFs are hindered by water deficits,mismatch between stands and habitat,single management purpose,and low efficiency.LEASFs are becoming more complex due to their wide range,the challenges associated with their restoration,and insufficient technological measures for their restoration.The key techniques of the quality and efficiency improvement of LEASFs include basic forest tending methods,near-natural restoration,multifunction-oriented improvement,and systematic restoration.An understanding on the formation mechanisms of LEASFs and a scientific approach toward their restoration are urgently needed and critical for the ecological protection and high-quality development of LEASFs on the CLP.Based on these analyses,we recommend strengthening the monitoring and supervision of LEASFs,considering the bearing capacity of regional water resources,implementing multiple restoration techniques,promoting multifunction-oriented ecological development,and exploring new management concepts to achieve the sustainable development of ASFs on the CLP.展开更多
The need for reforestation in cork oak (Quercus suber L.) areas is challenged by difficulties. Principal among these is herbivory of young plants, vegetative competition, and slow growth rates of cork oak seedlings. W...The need for reforestation in cork oak (Quercus suber L.) areas is challenged by difficulties. Principal among these is herbivory of young plants, vegetative competition, and slow growth rates of cork oak seedlings. We evaluated the early development of cork oak seedlings treated using tree shelters and mulching in northwestern Tunisia. We tested three tree shelter treatments (non-vented, vented, and control) to shield seedlings from animal damage and five mulch types to control competing vegetation (Italian Stone Pine, Lentisk, combination of Italian Stone Pine and Lentisk (organic mulches), gravel (inorganic mulch) and no mulch). At the end of the two-year experiment, sheltered seedlings were 89-99% taller than unshelteredseedlings and had higher numbers and lengths of shoot growth flushes. In contrast, both stem diameter growth and dry weight biomass (from samples extracted after two years) were significantly reduced inside tree shelters. Root-to-shoot ratio was not significantly different in sheltered vs. unsheltered seedlings, suggesting that tree shelters do not adversely affect this parameter. Mulching alone did not favour growth, but could be beneficial when combined with tree shelters. The combination of vented tree shelters and gravel mulch was the most effective treatment for promoting diameter, height and stem volume growth.展开更多
Sand fences made of punched steel plate(PSP)have recently been applied to control wind-blown sand in desertified and Gobi areas due to their strong wind resistance and convenient in situ construction.However,few studi...Sand fences made of punched steel plate(PSP)have recently been applied to control wind-blown sand in desertified and Gobi areas due to their strong wind resistance and convenient in situ construction.However,few studies have assessed the protective effect of PSP sand fences,especially through field observations.This study analyzes the effects of double-row PSP sand fences on wind and sand resistance using field observations and a computational fluid dynamics(CFD)numerical simulation.The results of field observations showed that the average windproof efficiencies of the first-row and second-row sand fences were 79.8%and 70.8%,respectively.Moreover,the average windproof efficiencies of the numerical simulation behind the first-row and second-row sand fences were 89.8%and 81.1%,respectively.The sand-resistance efficiency of the double-row PSP sand fences was 65.4%.Sand deposition occurred close to the first-row sand fence;however,there was relatively little sand on the leeward side of the second-row sand fence.The length of sand accumulation near PSP sand fences obtained by numerical simulation was basically consistent with that through field observations,indicating that field observations combined with numerical simulation can provide insight into the complex wind-blown sand field over PSP sand fences.This study indicates that the protection efficiency of the double-row PSP sand fences is sufficient for effective control of sand hazards associated with extremely strong wind in the Gobi areas.The output of this work is expected to improve the future application of PSP sand fences.展开更多
We assessed the effect of mulching and tree shelters on the establishment and early growth of zeen oak(Quercus canariensis Willd.) during the first 4 years after planting in Northwestern Tunisia. Five mulch types(Ital...We assessed the effect of mulching and tree shelters on the establishment and early growth of zeen oak(Quercus canariensis Willd.) during the first 4 years after planting in Northwestern Tunisia. Five mulch types(Italian Stone Pine(Pinus pinea L.), Lentisk(Pistacia lentiscus L.),and a combination of Italian Stone Pine and Lentisk(organic mulches), gravel(inorganic mulch) and control), and three tree shelter types(non-vented and vented tree shelters, and control) were tested. An increase in the number of internodes occurred under the gravel mulch, while a reduction in survival was found for the lentisk mulch. Tree shelters had no effect on survival, but increased mean height growth and reduced mean diameter growth during the 4 years(excepting a non-significant effect for vented tree shelter at year four). Comparison of the annual shoots and growth units(GU) between sheltered and unsheltered plants according to year of formation revealed two growth phases. In first phase, shoots were totally or partially inside the shelters; mean length of annual shoots and GU were greater for sheltered plants. The second phase was characterized by shoots emerging from shelters; mean length of annual shoots and GU were similar for all plants, with or without tree shelters. Results suggest that the use of tree shelters, particularly vented shelters, could contribute to the improvement of the artificial regeneration of zeen oak.The use of mulching alone or in combination with tree shelters did not improve zeen oak performance in the field.展开更多
The earthquake is considered one of the most devastating disasters in any area of the world due to its potentially destructive force.Based on the various earthquake-related parameters,the risk assessment is enabled in...The earthquake is considered one of the most devastating disasters in any area of the world due to its potentially destructive force.Based on the various earthquake-related parameters,the risk assessment is enabled in advance to prevent future earthquake disasters.In this paper,for providing the shelter space demands to reduce the damage level and prevention costs,an earthquake risk assessment approach is proposed for deriving the risk index based on multiple spatial parameters in the gridded map.The proposed assessment approach is comprised of pre-processing,methodologymodel,and data visualization.The risk index model derives the earthquake risk index by multiple spatial parameters including indexes of earthquake,danger,shelter,and building for blocks in the quantitative gridded map.The parameters are provided based onmathematicalmodels and combinedwith the risk index that presents the earthquake risk assessment result for each block.Therefore,the gridding approach is proposed to provide the elements of the risk assessment area that are used in the spatial parameters.The gridded map is developed for the selected area to visualize risk index parameters associated with each risk zone.Based on the derived result of the proposed earthquake risk indexmodel,emergency shelter requirements are provided according to the risk index for each location,which supports safety measures in advance to prevent future earthquake disasters.展开更多
At the end of 2019,the novel coronavirus infection outbroke in Wuhan,Hubei Province.On Feb.2,2020,Wuhan,as the worst-hit region,began to build“shelter hospital”rapidly to treat patients with mild ilness.The shelter ...At the end of 2019,the novel coronavirus infection outbroke in Wuhan,Hubei Province.On Feb.2,2020,Wuhan,as the worst-hit region,began to build“shelter hospital”rapidly to treat patients with mild ilness.The shelter hospital has multiple functions such as emergency treatment,surgical treatment and clinical test,which can adapt to emergency medical rescue tasks.Based on the characteristics that shelter hospital only treats patients with mild ilness,tests of shelter laboratory,including coronavirus nucleic acid detection,IgM/IgG antibody serology detection,monitoring and auxiliary diagnosis and/or a required blood routine,urine routine,C-reactive protein,calcitonin original,biochemical indicators(liver enzymes,myocardial enzymes,renal function,etc.)and blood coagulation function test etc,were used to provide important basis for the diagnosis and treatment of the disease.In order to ensure laboratory biosafety,it is necessary to first evaluate the harm level of various specimens.In the laboratory biosafety management,the harm level assessment of microorganisms is the core work of biosafety,which is of great significance to guarantee biosafety.As an emergency deployment afcted by the environment,shelter laboratory must possess strong mobility.This paper will explore how to combine the biosafety model of traditional laboratory with the particularity of shelter laboratory to carry out effective work in response to the current epidemic.展开更多
Humanity suffers an ever-present threat of crises. In the event of a crisis, the population in affected areas will be in danger and will need to be evacuated to a safer in order to protect their lives. One of the diff...Humanity suffers an ever-present threat of crises. In the event of a crisis, the population in affected areas will be in danger and will need to be evacuated to a safer in order to protect their lives. One of the difficulties in emergency management is quickly and accurately selecting suitably safe areas of refuge. This paper aims to explain an evacuation shelter selection process that uses rough set theory and a geographical information system (GIS). The proposed approach uses rough set theory concepts to classify shelters and selects suitable shelters on the basis of three factors: distance, capacity, and the availability of life requirements. The preparation of data and reporting of results are performed via the GIS environment. The proposed approach was implemented using Masoura,Egypt, as a case study and the re- sults of this implementation are presented.展开更多
The study describes the improvements of the participants in ESP course incorporating Sheltered Instruction Observation Protocol(SIOP) instruction in China. It aims to investigate whether or not it is effective to inco...The study describes the improvements of the participants in ESP course incorporating Sheltered Instruction Observation Protocol(SIOP) instruction in China. It aims to investigate whether or not it is effective to incorporate the sheltered instruction into ESP course and whether or not the participants will be motivated to improve their English skills for professional purposes. Quantitative and qualitative data sources were employed, including English language tests, questionnaires, and interviews.Findings reveal that the sheltered instruction was helpful to ESP course and produced significant achievements in participants' English vocabulary and skills. The most interesting result is that the participants' confidence and interest in learning professional English for future jobs has been improved much.展开更多
Objective:To determine the prevalence of infection with intestinal parasites in 101 dogs in an animal shelter in Veracruz.Mexico,and investigate whether any general characteristics of the dogs were associated with inf...Objective:To determine the prevalence of infection with intestinal parasites in 101 dogs in an animal shelter in Veracruz.Mexico,and investigate whether any general characteristics of the dogs were associated with infections.Methods:Parasitologiesl examination of fecal samples from the dogs was performed by means of centrifuge-flotation using Sheather's sucrose and zinc sulfate flotation media.In addition,hematocrit was determined in each canine blood sample.Results:Intestinal parasites were found in 99(98.0%) of the 101 dogs studied.About five different intestinal parasites were identified:Ancylostoma caninum in 89 dogs(88.1%).Giardia canis in 46(45.5%).Unciiuiria stenocephalia in 43(42.6%).Trichuris vulpis in 19(18.8%)and Strongyloides canis in 16(15.8%).Multivariate analysis showed:I) Giardia infection was associated with young age and mixed breed;2) Ancylostoma was associated with young age and no rabies vaccination:and 3) Strongyloides was associated with no rabies vaccination.Unciiuiria and Trichuris infections were not associated with the variables assessed.Conclusions:A high prevalence of intestinal parasites was found in the dogs studied.This suggests that the environment is highly contaminated with intestinal parasites.Preventive and therapeutic measures should be taken against infection with intestinal parasites in dogs in this region.展开更多
The "Three Norths" (Northeastern China, Northern China, and Northwestern China)Shelter forest area is located in the north part of china. The area of this region occupies41% of the total area of China. This ...The "Three Norths" (Northeastern China, Northern China, and Northwestern China)Shelter forest area is located in the north part of china. The area of this region occupies41% of the total area of China. This region is eager for being managed because of its fragileecological conditions. Therefore, the basic approach to realize the harmonious developmentof ecological and economic benefits is the rational arrangement of farming, forestry and pas-ure land according to the characteristics of land resources of this region.展开更多
Animal shelters’ adoption processes vary across the US. Some programs have rigorous policy based programs in which potential adopters are screened in or out based on their responses to a series of qualifying question...Animal shelters’ adoption processes vary across the US. Some programs have rigorous policy based programs in which potential adopters are screened in or out based on their responses to a series of qualifying questions. Some other organizations use a conversation based approach with-out policies around such things as income, vaccination status of animals in the home and landlord approval. Those organizations that use the policy-based approach do so with the premise that the animal will be loved and cared for better by those that meet their criteria. Policy based adoptions can be arduous and can decrease adoptions, as, for example, those living in apartments that are unable to prove their landlord accepts pets are turned away. We hypothesized that meeting or not meeting policy based criteria would have no impact on the care or bond of the adopter with the pet. This study examined the quality of care and attachment in two groups of adopters, a group that adopted while policy based adoptions were in place and a group that adopted when policies were eliminated. There were no substantial differences between the two groups. This important finding indicates that those that adopt through conversation based adoptions (policy-free) provide similar high quality care and are just as likely to be highly bonded to their pet as those that adopt through policy based adoptions.展开更多
The phenomenon of dogs’ relinquishment in Italy has become a social evil, although many laws exist to regulate animal protection and lately, the act of abandonment has become criminalised (law n.189/2004, enforced by...The phenomenon of dogs’ relinquishment in Italy has become a social evil, although many laws exist to regulate animal protection and lately, the act of abandonment has become criminalised (law n.189/2004, enforced by law n.201/2010). Adoption from shelters seems to be the only way to have a controlled, microchipped population of dogs, as well as limiting confinement and euthanasia. After being asked to simplify the previous Ethotest ? version [13] by many shelter operators and veterinarians, the authors aimed at analyzing the effectiveness of an improved model to test dogs’ behavioral aptitude matching the expectations of a hypothetical adopter. The new version improves the test feasibility by the elimination of a previous computer-based program, and by the introduction of new items such as hierarchical behavior towards food. In this study dogs housed in the sanitary shelter of L’Aquila (Abruzzo, Italy), of different age and sex, either sterilized or not, and belonging to different breeds or crossbreeds, were tested. All the dogs adopted from the shelter were monitored for one year after the adoption by both phone interviews and home visit. The study aimed at analyzing if the shelter dogs showed a good and consistent behavior after adoption in the new environment. The results demonstrated that apart from a predictable relinquishment and an unfortunate case of abuse, none of the dogs adopted showed any unwanted behaviors such as house soiling, jumping up, separation-related and aggressive behaviors;this made their stay in the family a desirable, exciting experience independently of the dog sex, age, and the family composition. The authors stress the necessity of every shelter, together with the veterinary cares, for a professional expert at dogs’ behavior who can efficaciously prevent behavioral problems, eventually train the dogs and afford the pairing with humans in a competent, qualified manner.展开更多
Effects of environmental factors such as climate,topography,vegetation and soil in shelter forests in Three Gorges Reservoir Region on runoff and sediment yields were monitored to identify dominant environmental facto...Effects of environmental factors such as climate,topography,vegetation and soil in shelter forests in Three Gorges Reservoir Region on runoff and sediment yields were monitored to identify dominant environmental factors controlling runoff and sediment yields in 15 runoff plots in study area by soil sampling,laboratory analysis,stepwise regression analysis and path analysis,and to establish the main control environmental factors that affect runoff and sediment yields. The results showed that soil bulk density,herbaceous cover,slope,and canopy density were the significant factors controlling runoff,and the direct path coefficient of each factor was ranked as canopy closure(-0. 628) > litter thickness(-0. 547) > bulk density( 0. 509) > altitude( 0. 289). The indirect path coefficient was ranked as soil bulk density( 0. 354) >litter thickness(-0. 169) > altitude( 0. 126) > canopy closure(-0. 104). Therefore,canopy closure and litter thickness mainly had direct effects on runoff,while soil bulk density mainly had indirect effects through their contributions to other factors. Herbaceous cover,litter thickness,slope,canopy density,and altitude were the significant factors controlling sediment yields. The direct path coefficient of each factor was ranked as herbaceous cover(-0. 815) > litter thickness(-0. 777) > canopy closure(-0. 624) > slope( 0. 620). The indirect path coefficient was ranked as slope( 0. 272) > litter thickness(-0. 131) > canopy closure(-0. 097) > herbaceous cover(-0. 084). Therefore,herbaceous cover and litter thickness mainly had direct effects on sediment yields,while slope mainly had indirect effects through their contributions to other factors. All the selected environmental factors jointly explained 85. 5% and 78. 3% of runoff and sediment yield variability,respectively. However,there were large values of remaining path coefficients of other factors influencing runoff and sediment yields,which indicated that some important factors are not included and should be taken into account.展开更多
In order to make clear the effects of rain shelter cultivation on the incidence of diseases and pests of grape in Shandong Province,with Summer Black as the material,the diseases and pests of grape under rain shelter ...In order to make clear the effects of rain shelter cultivation on the incidence of diseases and pests of grape in Shandong Province,with Summer Black as the material,the diseases and pests of grape under rain shelter cultivation and open field cultivation in Tai'an and Jining were investigated.The results showed that under the rain shelter cultivation condition,the phenological period of grape delayed 5-8 d.The types of grape diseases and pests under the rain shelter cultivation were the same as those in the open filed cultivation.The most serious pests were Apolygus lucorum,followed by Lycorma delicatula,Erythreura apicalis and Thrips tabaci.The most serious leaf disease was downy mildew,and the most serious disease of grape berries was grape sour rot.Compared with the open field cultivation,the rain shelter cultivation could effectively reduce the incidence of pests and diseases in grape leaves and fruit.At the end of May 2018 and 2019,the occurrence rate of grape pests under the rain shelter cultivation in Tai'an reduced by 57.69%and 60.47%,respectively,and those in Jining reduced by 72.22%and 62.50%,respectively.In the middle of July of 2018 and 2019,the incidence of grape fruit diseases under the rain shelter cultivation in Tai'an reduced by 62.49%and 50.07%,respectively,and that in Jining reduced by 49.96%and 100%,respectively.展开更多
This paper examines the impact of microfinance(MF)programmes on improving the shelter conditions of beneficiary households of Southern Province in Sri Lanka.The ownership of conditional house is one of key indicators ...This paper examines the impact of microfinance(MF)programmes on improving the shelter conditions of beneficiary households of Southern Province in Sri Lanka.The ownership of conditional house is one of key indicators measure fulfilling the basic needs of a household on the one hand and healthiness of it on the other.The study is based on the data and information gathered from a sample survey of 405 microfinance recipients of four national level leading Microfinance Institutions(MFIs)in Sri Lanka for 2017.These include:Thrift and Credit Cooperative Societies(TCCSs),Samurdhi Banking Societies(SBSs),Ruhuna Development Bank(RDB),and Sarvodaya Economic Enterprise Development Societies(SEEDS).For analysis purpose,a comparison group has been selected from the existing MF recipients whose membership duration with microfinance(MF)is not longer than one year to compare their shelter status with that of existing MF recipients whose membership duration with MF programmes is longer than one year.Three indicators:size of living space,conditions of the house,and current market value of a dwelling house are used for assessing the impact.Based on the data analysis,the study found that Microfinance has benefited the Borrowing Households(BHHs)to improve their shelter status in terms of all the indicators of housing conditions(except roof condition),size of living space,and market value of a dwelling house.展开更多
The Technical Regulations for Rain Shelter Cultivation of Summer Black Grape(T/SDAS 36-2018)stipulates the terms and definitions of rain shelter cultivation technique of summer black grape,producing area environment,c...The Technical Regulations for Rain Shelter Cultivation of Summer Black Grape(T/SDAS 36-2018)stipulates the terms and definitions of rain shelter cultivation technique of summer black grape,producing area environment,construction of rain shelter,seedling planting,types and con-struction of grape trellis,training and pruning,flower and fruit management,water and fertilizer management,disease and pest control,harvest,packing and storage,etc.,which is suitable for summer black grape planting in Shandong and the areas of the same ecological type in China.展开更多
基金supported by National Key Research and Development Program of China(2019YFC1200500)supported by Emergency Key Program of Guangzhou Laboratory(EKPG21-01)supported by National Natural Science Foundation of China(32070166)。
文摘The coronavirus disease 2019(COVID-19)pandemic caused by frequently mutating severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)has had a worldwide impact.However,detailed data on the potential aerosol transmission of SARS-CoV-2 in real-world and controlled laboratory settings remain sparse.During the COVID-19 pandemic in Shanghai,China in 2022,samples were collected in a Fangcang shelter hospital,a large-scale temporary hospital rapidly built by converting the existing National Exhibition and Convention Center(Shanghai)into a health care facility.Aerosol samples at different sites and intervals around patients and in public areas,surface samples,and pharyngeal swab samples from corresponding patients were included.Samples were tested for SARS-CoV-2 using real-time quantitative polymerase chain reaction(RT-qPCR)assays,followed by sequencing if the cycle threshold(Ct)value was<30.The positivity rate for SARS-CoV-2 in aerosol samples was high in contaminated zones(37.5%,104/277),especially around the bed(41.2%,68/165)and near ventilation inlets(45.2%,14/31).The prevalence of SARS-CoV-2 around the bed,public areas,and air inlets of exhaust vents fluctuated and was closely related to the positivity rate among patients at corresponding sampling sites.Some surface samples of different personal protective equipment from medical staff had high positivity rates.Sixty sequences of joined ORF1ab and spike genes obtained from sixty samples represented two main clusters of Omicron SARS-CoV-2.There was consistency in virus sequences from the same patient and their environment,and the detected virus sequences matched those of virus strains in circulation during the collection periods,which indicated a high likelihood of cross-contamination in the Fangcang shelter hospital.In summary,the results provide a quantitative and real landscape of the aerosol transmission of SARS-CoV-2 and a patient-centered view of contamination in large and enclosed spaces and offer a useful guide for taking targeted measures to avoid nosocomial infections during the management of SARS-CoV-2 or other respiratory virus diseases in a Fangcang shelter hospital.
基金supported by the Science and Technology Innovation Program of the Shaanxi Academy of Forestry (SXLK2022-02)the National Natural Science Foundation of China (42077452)the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA23070201).
文摘The construction of artificial shelter forests(ASFs)has resulted in substantial ecological,economic,and societal benefits to the Chinese Loess Plateau(CLP).However,the health and benefits of ASFs are being increasingly threatened by the formation of low-efficiency artificial shelter forests(LEASFs).In this study,LEASFs are systematically analyzed in terms of their status,formation mechanisms,and developmental obstacles.The key restoration techniques and schemes were summarized to improve the quality and efficiency of LEASFs.LEASFs are formed by relatively complex mechanisms,but they arise mainly due to poor habitat conditions,improper tree species selections,mismatch between stands and habitat,extensive forest management measures,and human interferences.The restoration and improvement of LEASFs are hindered by water deficits,mismatch between stands and habitat,single management purpose,and low efficiency.LEASFs are becoming more complex due to their wide range,the challenges associated with their restoration,and insufficient technological measures for their restoration.The key techniques of the quality and efficiency improvement of LEASFs include basic forest tending methods,near-natural restoration,multifunction-oriented improvement,and systematic restoration.An understanding on the formation mechanisms of LEASFs and a scientific approach toward their restoration are urgently needed and critical for the ecological protection and high-quality development of LEASFs on the CLP.Based on these analyses,we recommend strengthening the monitoring and supervision of LEASFs,considering the bearing capacity of regional water resources,implementing multiple restoration techniques,promoting multifunction-oriented ecological development,and exploring new management concepts to achieve the sustainable development of ASFs on the CLP.
基金supported by the laboratory of silvopastoral resources (Silvopastoral Institute-Tabarka)
文摘The need for reforestation in cork oak (Quercus suber L.) areas is challenged by difficulties. Principal among these is herbivory of young plants, vegetative competition, and slow growth rates of cork oak seedlings. We evaluated the early development of cork oak seedlings treated using tree shelters and mulching in northwestern Tunisia. We tested three tree shelter treatments (non-vented, vented, and control) to shield seedlings from animal damage and five mulch types to control competing vegetation (Italian Stone Pine, Lentisk, combination of Italian Stone Pine and Lentisk (organic mulches), gravel (inorganic mulch) and no mulch). At the end of the two-year experiment, sheltered seedlings were 89-99% taller than unshelteredseedlings and had higher numbers and lengths of shoot growth flushes. In contrast, both stem diameter growth and dry weight biomass (from samples extracted after two years) were significantly reduced inside tree shelters. Root-to-shoot ratio was not significantly different in sheltered vs. unsheltered seedlings, suggesting that tree shelters do not adversely affect this parameter. Mulching alone did not favour growth, but could be beneficial when combined with tree shelters. The combination of vented tree shelters and gravel mulch was the most effective treatment for promoting diameter, height and stem volume growth.
基金This research was funded by the Fellowship of the China Postdoctoral Science Foundation(2021M703466)the Basic Research Innovation Group Project of Gansu Province,China(21JR7RA347)the Natural Science Foundation of Gansu Province,China(20JR10RA231).
文摘Sand fences made of punched steel plate(PSP)have recently been applied to control wind-blown sand in desertified and Gobi areas due to their strong wind resistance and convenient in situ construction.However,few studies have assessed the protective effect of PSP sand fences,especially through field observations.This study analyzes the effects of double-row PSP sand fences on wind and sand resistance using field observations and a computational fluid dynamics(CFD)numerical simulation.The results of field observations showed that the average windproof efficiencies of the first-row and second-row sand fences were 79.8%and 70.8%,respectively.Moreover,the average windproof efficiencies of the numerical simulation behind the first-row and second-row sand fences were 89.8%and 81.1%,respectively.The sand-resistance efficiency of the double-row PSP sand fences was 65.4%.Sand deposition occurred close to the first-row sand fence;however,there was relatively little sand on the leeward side of the second-row sand fence.The length of sand accumulation near PSP sand fences obtained by numerical simulation was basically consistent with that through field observations,indicating that field observations combined with numerical simulation can provide insight into the complex wind-blown sand field over PSP sand fences.This study indicates that the protection efficiency of the double-row PSP sand fences is sufficient for effective control of sand hazards associated with extremely strong wind in the Gobi areas.The output of this work is expected to improve the future application of PSP sand fences.
基金supported by the laboratory of silvopastoral resources(Silvopastoral Institute-Tabarka)
文摘We assessed the effect of mulching and tree shelters on the establishment and early growth of zeen oak(Quercus canariensis Willd.) during the first 4 years after planting in Northwestern Tunisia. Five mulch types(Italian Stone Pine(Pinus pinea L.), Lentisk(Pistacia lentiscus L.),and a combination of Italian Stone Pine and Lentisk(organic mulches), gravel(inorganic mulch) and control), and three tree shelter types(non-vented and vented tree shelters, and control) were tested. An increase in the number of internodes occurred under the gravel mulch, while a reduction in survival was found for the lentisk mulch. Tree shelters had no effect on survival, but increased mean height growth and reduced mean diameter growth during the 4 years(excepting a non-significant effect for vented tree shelter at year four). Comparison of the annual shoots and growth units(GU) between sheltered and unsheltered plants according to year of formation revealed two growth phases. In first phase, shoots were totally or partially inside the shelters; mean length of annual shoots and GU were greater for sheltered plants. The second phase was characterized by shoots emerging from shelters; mean length of annual shoots and GU were similar for all plants, with or without tree shelters. Results suggest that the use of tree shelters, particularly vented shelters, could contribute to the improvement of the artificial regeneration of zeen oak.The use of mulching alone or in combination with tree shelters did not improve zeen oak performance in the field.
基金This research was supported in part by the Energy Cloud R&D Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Science,ICT(2019M3F2A1073387)in part by the Basic Science Research Program through the NRF funded by the Ministry of Education(NRF-2019R1I1A1A01062456),Any correspondence related to this paper should be addressed to Dohyeun Kim.
文摘The earthquake is considered one of the most devastating disasters in any area of the world due to its potentially destructive force.Based on the various earthquake-related parameters,the risk assessment is enabled in advance to prevent future earthquake disasters.In this paper,for providing the shelter space demands to reduce the damage level and prevention costs,an earthquake risk assessment approach is proposed for deriving the risk index based on multiple spatial parameters in the gridded map.The proposed assessment approach is comprised of pre-processing,methodologymodel,and data visualization.The risk index model derives the earthquake risk index by multiple spatial parameters including indexes of earthquake,danger,shelter,and building for blocks in the quantitative gridded map.The parameters are provided based onmathematicalmodels and combinedwith the risk index that presents the earthquake risk assessment result for each block.Therefore,the gridding approach is proposed to provide the elements of the risk assessment area that are used in the spatial parameters.The gridded map is developed for the selected area to visualize risk index parameters associated with each risk zone.Based on the derived result of the proposed earthquake risk indexmodel,emergency shelter requirements are provided according to the risk index for each location,which supports safety measures in advance to prevent future earthquake disasters.
基金This project was supported by Major Research Projects of Sichuan Health Commission(No.16ZD026).
文摘At the end of 2019,the novel coronavirus infection outbroke in Wuhan,Hubei Province.On Feb.2,2020,Wuhan,as the worst-hit region,began to build“shelter hospital”rapidly to treat patients with mild ilness.The shelter hospital has multiple functions such as emergency treatment,surgical treatment and clinical test,which can adapt to emergency medical rescue tasks.Based on the characteristics that shelter hospital only treats patients with mild ilness,tests of shelter laboratory,including coronavirus nucleic acid detection,IgM/IgG antibody serology detection,monitoring and auxiliary diagnosis and/or a required blood routine,urine routine,C-reactive protein,calcitonin original,biochemical indicators(liver enzymes,myocardial enzymes,renal function,etc.)and blood coagulation function test etc,were used to provide important basis for the diagnosis and treatment of the disease.In order to ensure laboratory biosafety,it is necessary to first evaluate the harm level of various specimens.In the laboratory biosafety management,the harm level assessment of microorganisms is the core work of biosafety,which is of great significance to guarantee biosafety.As an emergency deployment afcted by the environment,shelter laboratory must possess strong mobility.This paper will explore how to combine the biosafety model of traditional laboratory with the particularity of shelter laboratory to carry out effective work in response to the current epidemic.
文摘Humanity suffers an ever-present threat of crises. In the event of a crisis, the population in affected areas will be in danger and will need to be evacuated to a safer in order to protect their lives. One of the difficulties in emergency management is quickly and accurately selecting suitably safe areas of refuge. This paper aims to explain an evacuation shelter selection process that uses rough set theory and a geographical information system (GIS). The proposed approach uses rough set theory concepts to classify shelters and selects suitable shelters on the basis of three factors: distance, capacity, and the availability of life requirements. The preparation of data and reporting of results are performed via the GIS environment. The proposed approach was implemented using Masoura,Egypt, as a case study and the re- sults of this implementation are presented.
文摘The study describes the improvements of the participants in ESP course incorporating Sheltered Instruction Observation Protocol(SIOP) instruction in China. It aims to investigate whether or not it is effective to incorporate the sheltered instruction into ESP course and whether or not the participants will be motivated to improve their English skills for professional purposes. Quantitative and qualitative data sources were employed, including English language tests, questionnaires, and interviews.Findings reveal that the sheltered instruction was helpful to ESP course and produced significant achievements in participants' English vocabulary and skills. The most interesting result is that the participants' confidence and interest in learning professional English for future jobs has been improved much.
基金Supported by Universidad Veracruzana and Juarez University of Durango State(Grant No.P4 UV-UJED)
文摘Objective:To determine the prevalence of infection with intestinal parasites in 101 dogs in an animal shelter in Veracruz.Mexico,and investigate whether any general characteristics of the dogs were associated with infections.Methods:Parasitologiesl examination of fecal samples from the dogs was performed by means of centrifuge-flotation using Sheather's sucrose and zinc sulfate flotation media.In addition,hematocrit was determined in each canine blood sample.Results:Intestinal parasites were found in 99(98.0%) of the 101 dogs studied.About five different intestinal parasites were identified:Ancylostoma caninum in 89 dogs(88.1%).Giardia canis in 46(45.5%).Unciiuiria stenocephalia in 43(42.6%).Trichuris vulpis in 19(18.8%)and Strongyloides canis in 16(15.8%).Multivariate analysis showed:I) Giardia infection was associated with young age and mixed breed;2) Ancylostoma was associated with young age and no rabies vaccination:and 3) Strongyloides was associated with no rabies vaccination.Unciiuiria and Trichuris infections were not associated with the variables assessed.Conclusions:A high prevalence of intestinal parasites was found in the dogs studied.This suggests that the environment is highly contaminated with intestinal parasites.Preventive and therapeutic measures should be taken against infection with intestinal parasites in dogs in this region.
文摘The "Three Norths" (Northeastern China, Northern China, and Northwestern China)Shelter forest area is located in the north part of china. The area of this region occupies41% of the total area of China. This region is eager for being managed because of its fragileecological conditions. Therefore, the basic approach to realize the harmonious developmentof ecological and economic benefits is the rational arrangement of farming, forestry and pas-ure land according to the characteristics of land resources of this region.
文摘Animal shelters’ adoption processes vary across the US. Some programs have rigorous policy based programs in which potential adopters are screened in or out based on their responses to a series of qualifying questions. Some other organizations use a conversation based approach with-out policies around such things as income, vaccination status of animals in the home and landlord approval. Those organizations that use the policy-based approach do so with the premise that the animal will be loved and cared for better by those that meet their criteria. Policy based adoptions can be arduous and can decrease adoptions, as, for example, those living in apartments that are unable to prove their landlord accepts pets are turned away. We hypothesized that meeting or not meeting policy based criteria would have no impact on the care or bond of the adopter with the pet. This study examined the quality of care and attachment in two groups of adopters, a group that adopted while policy based adoptions were in place and a group that adopted when policies were eliminated. There were no substantial differences between the two groups. This important finding indicates that those that adopt through conversation based adoptions (policy-free) provide similar high quality care and are just as likely to be highly bonded to their pet as those that adopt through policy based adoptions.
文摘The phenomenon of dogs’ relinquishment in Italy has become a social evil, although many laws exist to regulate animal protection and lately, the act of abandonment has become criminalised (law n.189/2004, enforced by law n.201/2010). Adoption from shelters seems to be the only way to have a controlled, microchipped population of dogs, as well as limiting confinement and euthanasia. After being asked to simplify the previous Ethotest ? version [13] by many shelter operators and veterinarians, the authors aimed at analyzing the effectiveness of an improved model to test dogs’ behavioral aptitude matching the expectations of a hypothetical adopter. The new version improves the test feasibility by the elimination of a previous computer-based program, and by the introduction of new items such as hierarchical behavior towards food. In this study dogs housed in the sanitary shelter of L’Aquila (Abruzzo, Italy), of different age and sex, either sterilized or not, and belonging to different breeds or crossbreeds, were tested. All the dogs adopted from the shelter were monitored for one year after the adoption by both phone interviews and home visit. The study aimed at analyzing if the shelter dogs showed a good and consistent behavior after adoption in the new environment. The results demonstrated that apart from a predictable relinquishment and an unfortunate case of abuse, none of the dogs adopted showed any unwanted behaviors such as house soiling, jumping up, separation-related and aggressive behaviors;this made their stay in the family a desirable, exciting experience independently of the dog sex, age, and the family composition. The authors stress the necessity of every shelter, together with the veterinary cares, for a professional expert at dogs’ behavior who can efficaciously prevent behavioral problems, eventually train the dogs and afford the pairing with humans in a competent, qualified manner.
基金Supported by National Key Technology Research and Development Program of the Ministry of Science and Technology of China(2015BAD07B04)Key Science and Technology Program of Henan Province,China(152102110059)
文摘Effects of environmental factors such as climate,topography,vegetation and soil in shelter forests in Three Gorges Reservoir Region on runoff and sediment yields were monitored to identify dominant environmental factors controlling runoff and sediment yields in 15 runoff plots in study area by soil sampling,laboratory analysis,stepwise regression analysis and path analysis,and to establish the main control environmental factors that affect runoff and sediment yields. The results showed that soil bulk density,herbaceous cover,slope,and canopy density were the significant factors controlling runoff,and the direct path coefficient of each factor was ranked as canopy closure(-0. 628) > litter thickness(-0. 547) > bulk density( 0. 509) > altitude( 0. 289). The indirect path coefficient was ranked as soil bulk density( 0. 354) >litter thickness(-0. 169) > altitude( 0. 126) > canopy closure(-0. 104). Therefore,canopy closure and litter thickness mainly had direct effects on runoff,while soil bulk density mainly had indirect effects through their contributions to other factors. Herbaceous cover,litter thickness,slope,canopy density,and altitude were the significant factors controlling sediment yields. The direct path coefficient of each factor was ranked as herbaceous cover(-0. 815) > litter thickness(-0. 777) > canopy closure(-0. 624) > slope( 0. 620). The indirect path coefficient was ranked as slope( 0. 272) > litter thickness(-0. 131) > canopy closure(-0. 097) > herbaceous cover(-0. 084). Therefore,herbaceous cover and litter thickness mainly had direct effects on sediment yields,while slope mainly had indirect effects through their contributions to other factors. All the selected environmental factors jointly explained 85. 5% and 78. 3% of runoff and sediment yield variability,respectively. However,there were large values of remaining path coefficients of other factors influencing runoff and sediment yields,which indicated that some important factors are not included and should be taken into account.
基金Supported by Key Research and Development Program of Linyi City(2020ZX010)Agricultural Improved Variety Project of Shandong Province(2020LZGC008)Agricultural Science and Technology Innovation Project of Shandong Academy of Agricultural Sciences(CXGC2021A11)。
文摘In order to make clear the effects of rain shelter cultivation on the incidence of diseases and pests of grape in Shandong Province,with Summer Black as the material,the diseases and pests of grape under rain shelter cultivation and open field cultivation in Tai'an and Jining were investigated.The results showed that under the rain shelter cultivation condition,the phenological period of grape delayed 5-8 d.The types of grape diseases and pests under the rain shelter cultivation were the same as those in the open filed cultivation.The most serious pests were Apolygus lucorum,followed by Lycorma delicatula,Erythreura apicalis and Thrips tabaci.The most serious leaf disease was downy mildew,and the most serious disease of grape berries was grape sour rot.Compared with the open field cultivation,the rain shelter cultivation could effectively reduce the incidence of pests and diseases in grape leaves and fruit.At the end of May 2018 and 2019,the occurrence rate of grape pests under the rain shelter cultivation in Tai'an reduced by 57.69%and 60.47%,respectively,and those in Jining reduced by 72.22%and 62.50%,respectively.In the middle of July of 2018 and 2019,the incidence of grape fruit diseases under the rain shelter cultivation in Tai'an reduced by 62.49%and 50.07%,respectively,and that in Jining reduced by 49.96%and 100%,respectively.
文摘This paper examines the impact of microfinance(MF)programmes on improving the shelter conditions of beneficiary households of Southern Province in Sri Lanka.The ownership of conditional house is one of key indicators measure fulfilling the basic needs of a household on the one hand and healthiness of it on the other.The study is based on the data and information gathered from a sample survey of 405 microfinance recipients of four national level leading Microfinance Institutions(MFIs)in Sri Lanka for 2017.These include:Thrift and Credit Cooperative Societies(TCCSs),Samurdhi Banking Societies(SBSs),Ruhuna Development Bank(RDB),and Sarvodaya Economic Enterprise Development Societies(SEEDS).For analysis purpose,a comparison group has been selected from the existing MF recipients whose membership duration with microfinance(MF)is not longer than one year to compare their shelter status with that of existing MF recipients whose membership duration with MF programmes is longer than one year.Three indicators:size of living space,conditions of the house,and current market value of a dwelling house are used for assessing the impact.Based on the data analysis,the study found that Microfinance has benefited the Borrowing Households(BHHs)to improve their shelter status in terms of all the indicators of housing conditions(except roof condition),size of living space,and market value of a dwelling house.
基金Supported by Key Research and Development Program of Shandong Province(2019GNC106052)Key Technology of Shandong Province(2019JZZY010727,2019JZZY020623)+1 种基金Key Research and Development Program of Linyi City(2020ZX010)Agricultural Improved Variety Project of Shan-dong Province(2020LZGC008)。
文摘The Technical Regulations for Rain Shelter Cultivation of Summer Black Grape(T/SDAS 36-2018)stipulates the terms and definitions of rain shelter cultivation technique of summer black grape,producing area environment,construction of rain shelter,seedling planting,types and con-struction of grape trellis,training and pruning,flower and fruit management,water and fertilizer management,disease and pest control,harvest,packing and storage,etc.,which is suitable for summer black grape planting in Shandong and the areas of the same ecological type in China.
