检索结果-南通市图书馆

Applying Earth Observation Technologies to Economic Consequence Modeling:A Case Study of COVID‑19 in Los Angeles County,California

在线全文

学校读者我要写书评

暂无评论

International Journal of Disaster Risk Science 2024年第1期15卷 18-31页

作者： Fynnwin Prager Marina T.Mendoza Charles K.Huyck Adam Rose paul Amyx gregory Yetman Kristy F.Tiampo California State University Dominguez HillsCarsonCA 90747USA ImageCat Inc.Long BeachCA 90802USA University of Southern California Los AngelesCA 90015USA CIESIN–Center for International Earth Science Information Network Columbia UniversityPalisadesNY 10964USA Cooperative Institute for Research in Environmental Sciences(CIRES) University of Colorado BoulderBoulderCO 80309USA

Earth observation(EO) technologies,such as very high-resolution optical satellite data available from Maxar,can enhance economic consequence modeling of disasters by capturing the fine-grained and real-time behavioral responses of businesses and the *** investigated this unique approach to economic consequence modeling to determine whether crowd-sourced interpretations of EO data can be used to illuminate key economic behavioral responses that could be used for computable general equilibrium modeling of supply chain repercussions and resilience *** applied our methodology to the COVID-19 pandemic experience in Los Angeles County,California as a case *** also proposed a dynamic adjustment approach to account for the changing character of EO through longer-term disasters in the economic modeling *** found that despite limitations,EO data can increase sectoral and temporal resolution,which leads to significant differences from other data sources in terms of direct and total impact *** findings from this analytical approach have important implications for economic consequence modeling of disasters,as well as providing useful information to policymakers and emergency managers,whose goal is to reduce disaster costs and to improve economic resilience.

关键词： Computable general equilibrium models COVID-19 Disaster economic impacts Earth observation Economic consequence analysis Los Angeles County

The Black-winged Monarch(Monarcha frater):Geographic variation,taxonomy,a"new"population,and an enduring mystery in migration

在线全文

学校读者我要写书评

暂无评论

Avian Research 2023年第3期14卷 467-477页

作者： Leo Joseph Julian Teh paul Sweet Phil gregory Australian National Wildlife Collection CSIRO National Research Collections AustraliaCanberra2601Australia American Museum of Natural History New YorkUSA Sicklebill Safaris TopazQueensland4885Australia

The Black-winged Monarch(Monarcha frater)inhabits low-mid elevation forests across New Guinea and far northeastern *** its four recognized subspecies,*** is migratory,breeding in tropical north-eastern Australia from approximately November–*** non-breeding range of ***,apart from some individuals overwintering in Australia,has been unknown for>100 *** from 194 New Guinean and Australian specimens and a literature review have not solved this mystery;the narrow latitudinal range of the intratropical migration may inhibit use of GPS loggers in resolving the migration *** work in central and western parts of southern New Guinea is *** data,however,revealed an essentially overlooked population in north-western New Guinea east of the Bird's Head Peninsula phenotypically indistinguishable from nominate *** of that *** genomic analysis of the complex will be largely done from toepad skin because frozen tissue samples for DNA analysis exist only of four individuals of what we suggest should be elevated to species rank as *** discuss how genomic analysis might distinguish among alternative taxonomic hypotheses of one,two or three *** suggest English names for what we consider to be three diagnosable taxa worth recognizing at species rank in this group:Arfak Monarch corresponding to ***(Bird's Head Peninsula and the“new”population of north-western New Guinea);Pearly Monarch for ***(Australia and still unknown non-breeding range),and Masked Monarch for ***(including kunupi,elsewhere in New Guinea).

关键词： Australia Migration monarch flycatcher Monarcha frater New Guinea Taxonomy

A Rare Case of Concordant Atrioventricular Connection to L-Looped Ventricles in Situs Solitus:4-Dimensional Magnetic Resonance Imaging and 3D Printing

在线全文

学校读者我要写书评

暂无评论

Congenital Heart Disease 2022年第4期17卷 387-392页

作者： gregory Perens Takegawa Yoshida J.paul Finn UCLA Mattel Children’s Hospital Children’s Heart CenterLos AngelesCAUSA Diagnostic Cardiovascular Imaging Laboratory Department of Radiology12222 David Geffen School of Medicine at UCLALos AngelesCAUSA

An infant male presented with the rare anatomy consisting of situs solitus,concordant atrioventricular connections to L-looped ventricles,double outlet right ventricle(DORV),and hypoplastic aortic arch.6 months after neonatal aortic arch repair,the morphologic right ventricle function deteriorated,and surgical evaluation was undertaken to determine if either biventricular repair with a systemic morphologic left ventricle or right ventricular exclusion was *** initial echocardiography,magnetic resonance imaging(MRI)was used to create detailed axial and 4-dimensional(4D)images and 3-dimensional(3D)printed *** detailed anatomy of this rare,complex case and its use in pre-surgical planning is presented.

关键词： Magnetic resonance imaging cardiac segments 3D printing

Cool-season annual pastures with clovers to supplement wintering beef cows nursing calves

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2012年第4期3卷 221-226页

作者： Stacey A Gunter Whitney A Whitworth T gregory Montgomery paul A Beck United States Department of Agriculture Agricultural Research Service Southern Plains Range Research Station University of Arkansas at Monticello Division of Agriculture Southeast Research & Extension Center University of Arkansas Division of Agriculture Southwest Research & Extension Center University of Arkansas

In December of 3 years, 87 beef cows with nursing calves （.594 ± 9.8 kg; calving season, September to November） at side were stratified by body condition score, body weight, cow age, and calf gender and divided randomly into 6 groups assigned to 1 of 6 cool-season annual pastures （0.45 ha/cow） that had been interseeded into a dormant common bermudagrass （Cynodon dactylon [L.] Pers.）/bahiagrass （Paspalum notatum Flugge） sod. Pastures contained 1 of the following 3 seeding mixtures （2 pastures/mixture）： 1） wheat （Triticum aestivurn L.） and ryegrass （Lofium multiflorum Lain., WRG）, 2） wheat and ryegrass plus red clover （Trifolium pretense L, WRR）, or 3） wheat and ryegrass plus white （Trifofium repens L.） and crimson clovers （Trifolium incarnatum L., WRW）. All groups had ad libitum access to grass hay （12% crude protein; 58% total digestible nutrients）. The second week in December, cow estrous cycles were synchronized and artificially inseminated. In late December, a bull was placed with each group for 60-d. Data were analyzed with an analysis of variance using a mixed model containing treatment as the fixed effect and year as the random effect. Body weight and condition scores did not differ （P ≥ 0.27） among cows between February and June. Calf birth weights or average daily gain did not differ （P≥ 0.17） among treatments; however, calves grazing pastures with clovers did tend （P= 0.06） to weigh more than calves grazing grass only. Weaning weight per cow exposed to a bull was greater （P= 0.02） for WRR and WRW than WRG. Cows grazing winter-annual pastures containing clovers tended to wean more calf body weight per cow exposed to a bull than cows grazing the grass only pastures.

关键词： Annual ryegrass Beef cows Clovers Nitrogen Pasture 1

The Influence of Biological Maturity on Dynamic Force-Time Variables and Vaulting Performance in Young Female Gymnasts

在线全文

学校读者我要写书评

暂无评论

Journal of Science in Sport and Exercise 2020年第4期2卷 319-329页

作者： Sylvia Moeskops Jon L.Oliver paul J.Read John B.Cronin gregory D.Myer G.gregory Haff Isabel S.moore Rhodri S.Lloyd Youth Physical Development Centre Cardiff School of Sport and Health SciencesCardiff Metropolitan UniversityCyncoed CampusCyncoed RoadCardiffCF52YBUK Sports Performance Research Institute New Zealand(SPRINZ) AUT UniversityAuckland 1142New Zealand Centre for Sport Science and Human Performance Waikato Institute of TechnologyHamilton 3240New Zealand Athlete Health and Performance Research Centre Aspetar Orthopaedic and Sports Medicine HospitalDohaQatar Division of Sports Medicine Cincinnati Children’s HospitalCincinnatiOH45229USA Department of Pediatrics and Orthopaedic Surgery College of MedicineUniversity of CincinnatiCincinnatiOH 45267USA The Micheli Center for Sports Injury Prevention WalthamMA 02453USA Centre for Exercise and Sports Science Edith Cowan UniversityJoondalupWA 6027Australia Australian Centre for Research into Injury in Sport and Its Prevention(ACRISP) Edith Cowan UniversityJoondalupWA 6027Australia University of Gloucestershire GloucesterGL502RHUK

Purpose This cross-sectional study investigated dynamic force-time variables and vaulting performance in young female gymnasts of different maturity *** 120 gymnasts aged 5-14 years were sub-divided into maturity groupings using percent of predicted adult height(%PAH)*** performed three jumping protocols,the squat jump(SJ),countermovement jump(CMJ)and drop jump(DJ),before completing straight jump vaults that were recorded using two-dimensional *** Jumping performance improved with biological maturity evidenced by the most mature gymnasts’producing sig-nificantly more absolute force(P0.78),impulse(P0.75)and power(P0.91)than the least mature group,resulting in the greater jump heights(P0.70).While,no significant differences were observed in relative peak force across multiple tests,measures of relative peak power did significantly increase with *** upon regression analyses,maturation was found to influence vertical take-off velocity during vaulting,explaining 41%of the variance in each jumping *** all tests,the DJ was found to have the highest predictive ability of vaulting vertical take-off velocity,explaining 55%of the total *** Biological maturation impacts jump height and underpinning mechanical variables in young female *** vertical take-off velocity appears to be influenced by maturation and various dynamic force-time variables,par-ticularly those during DJ,which had the highest explained total variance.

关键词： Youth Maturation Squat jump Countermovement jump Drop jump Gymnastics

Utility of Kinetic and Kinematic Jumping and Landing Variables as Predictors of Injury Risk: A Systematic Review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Science in Sport and Exercise 2020年第4期2卷 287-304页

作者： Jason S.Pedley Rhodri S.Lloyd paul J.Read Isabel S.moore Mark De Ste Croix gregory D.Myer Jon L.Oliver Youth Physical Development Centre Cardiff Metropolitan UniversityCardiffUK Sports Performance Research Institute New Zealand AUT UniversityAucklandNew Zealand Centre for Sport Science and Human Performance Waikato Institute of TechnologyWaikatoNew Zealand Institute of Sport Exercise and HealthUniversity College LondonLondonUK School of Sport and Exercise University of GloucestershireGloucesterUK Cardiff School of Sport and Health Sciences Cardiff Metropolitan UniversityCardiffUK School of Sport and Exercise University of GloucestershireCheltenhamUK The SPORT Center Division of Sports MedicineCincinnati Children’s Hospital Medical CenterCincinnatiOHUSA Departments of Pediatrics and Orthopaedic Surgery College of MedicineUniversity of CincinnatiCincinnatiOHUSA Emory Sport Performance and Research Center Flowery BranchAtlantaGAUSA Emory Sports Medicine Center AtlantaGAUSA Department of Orthopaedics Emory University School of MedicineAtlantaGAUSA The Micheli Center for Sports Injury Prevention WalthamMAUSA

Purpose Jump-landing assessments provide a means to quantify an individual’s ability to attenuate ground reaction forces,generate lower limb explosive power and maintain joint *** order to identify risk factors that can be targeted through appropriate training interventions,it is necessary to establish which(scalar)objective kinetic,kinematic,and performance measures are most associated with lower-extremity *** Online searches of MEDLINE,SCOPUS,EBSCOHost,SPORTDiscus and PubMed databases were completed for all articles published before March 2020 in accordance with PRISMA *** 40 articles investigating nine jump-landing assessments were included in this *** 79%of studies using drop jump(n=14)observed an association with future injury,while only 8%of countermovement jump studies(n=13)observed an association with injury *** 57%of studies using unilateral assessments found associations with risk of injury(n=14).Studies using performance measures(jump height/distance)as outcome measure were only associated with injury risk in 30%of ***,those using kinetic and/or kinematic analyses(knee abduction moment,knee valgus angle,knee separation distance,peak ground reaction force)found associations with injury in 89%of *** The landing element of jump-landing assessments appears to be superior for identifying individuals at greater risk of injury;likely due to a closer representation of the injury ***,jump-landing assessments that involve attenuation of impact forces such as the drop jump appear most suited for this purpose but should involve assessment of frontal plane knee motion and ground reaction forces.

关键词： Plyometric Screening Anterior cruciate ligament Lower-extremity

A Transshipment Model of Seven-Up Bottling Company, Benin Plant, Nigeria

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Operations Research 2019年第3期9卷 129-145页

作者： gregory Okiemute Agadaga Nsikan paul Akpan Department of Mathematics and Statistics Faculty of Science University of Port Harcourt Rivers State Nigeria

This research work seeks to model the distribution of 50 cl Pepsi soft drink as a transhipment problem. The transshipment problem is an extension of the traditional transportation problem which takes into account a multi-phase transport system in which the flows of goods and services are taken through an intermediate point (transhipment points) between the origin and the destination with varying objective functions. The main focus in this research was to obtain the minimum cost of transporting 10,000 crates of the product from the Benin plant (source) through deports (transshipment points) to the Sapele-Warri region (sinks) where the product is demanded. Data collected were analyzed using TORA Windows Version 2.00 software. The analysis shows that the minimum cost of transporting the product can be achieved if the product is shipped directly from the source to the sink. This forms that basis for the conclusions and recommendations of the research.

关键词： Transshipment Problem Linear Programming Problems (LPP) Pepsi Soft Drink Minimum Cost Benin Production Plant

Correlation of stress radiographs to injuries associated with lateral ankle instability

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Orthopedics 2021年第9期12卷 710-719页

作者： Joshua W Sy Andrew J Lopez gregory E Lausé J Banks Deal Michael B Lustik paul M Ryan Department of Orthopaedic Surgery Tripler Army Medical CenterHonoluluHI 96859United States Department of Statistics Tripler Army Medical CenterHonoluluHI 96859United States

BACKGROUND Stress radiographs have demonstrated superior efficacy in the evaluation of ankle *** To determine if there is a degree of instability evidenced by stress radiographs that is associated with pathology concomitant with ankle ligamentous *** A retrospective review of 87 consecutive patients aged 18-74 who had stress radiographs performed at a single institution between 2014 and 2020 was *** manual radiographic stress views were then correlated with magnetic resonance imaging and operative *** A statistically significant association was determined for the mean and median stress radiographic values and the presence of peroneal pathology(P=0.008 for tendonitis and P=0.020 for peroneal tendon tears).A significant inverse relationship was found between the presence of an osteochondral defect and increasing degrees of instability(P=0.043).CONCLUSION Although valuable in the clinical evaluation of ankle instability,stress radiographs are not an independent predictor of conditions associated with ankle in-stability.

关键词： Ankle stress radiographs Lateral ankle instability Osteochondral defect Arthroscopy Peroneal tendinopathy

Berberine Attenuated Aging-Accelerating Effect of High Temperature in Drosophila Model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2014年第3期5卷 275-278页

作者： Valeriya Navrotskaya gregory Oxenkrug Lyudmila Vorobyova paul Summergrad Tufts University School of Medicine Tufts Med-ical Center Boston USA V. N. Karazin Kharkiv National University Kharkiv Ukraine

We have observed that berberine prolonged life span and improved viability of pupae and climbing activity of imagoes of wild-type Drosophila melanogaster maintained at 23°C. As a continuation of our studies of berberine effect on life span, we were interested to evaluate the effect of berberine of life span in flies maintained at a higher temperature (28°C) known to accelerate aging in wild type flies. Considering that genetically or pharmacologically induced deficiency of TRP conversion into KYN prolonged life span in a Drosophila model, we compared the effects of berberine, a powerful inhibitor of kynurenine (KYN) formation from tryptophan (TRP), on life span in wild type and in Drosophila melanogaster mutants (vermilion) with deficient TRP-KYN metabolism maintained at 23°C and 28°C. High (28°C) ambient temperature decreased life span in both wild type and vermilion flies. Aging accelerating effect of high temperature was more pronounced in Oregon than in vermilion flies (-60% vs. -40% decrease of mean life span, resp). Berberine attenuated the aging-accelerating effect of high temperature. Effect of berberine was more pronounced in Oregon (+46%) than in vermilion (+22%) flies. The obtained data suggested the possible involvement of TRP-KYN metabolism in the aging-acceleration effect of the high temperature and in protective effect of berberine.

关键词： Berberine Life Span Drosophila Melanogaster High Temperature Kynurenine