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Performance of Weibull function as a diameter distribution model for Pinus thunbergii stands in the eastern coast of South Korea

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Journal of Mountain Science 2016年第5期13卷 822-830页

作者： ABINO Azyleah Canizares KIM Sung Yong LUMBRES Roscinto Ian Canicosa JANG Mi Na YOUN Ho doong PARK Ki Hyung LEE Young Jin Department of Forest Resources Kongju National UniversityYesanChungnam 340-802South Korea Laguna Lake Development Authority DilimanQuezon City 1101Philippines College of Forestry Benguet State UniversityLa TrinidadBenguet2601Philippines Division of Forest Disaster Management Korea Forest Research InstituteSeou1130-712South Korea

This study was carried out to determine the performance of percentile-based Weibull diameter distribution model for Pinus thunbergii stands thriving along the eastern coast of South Korea. The parameter recovery technique was used to estimate the three parameters of the Weibull model. The analysis demonstrated satisfactory results based on the following test statistics for the principal percentile models： fit index （FI） range from 0.501（minimum diameter） to 0.932 （50th diameter percentiles） and root mean square error （RMSE） range from 0.112 （quadratic mean diameter） to 3.572 （minimum diameter）. The developed model was further evaluated by determining the mean bias （E） in trees per ha （TPH） for each diameter class, and the results showed highest over-prediction in the 20 cm, and under-prediction in the x6 cm and 24 cm diameter classes. The goodness of fit tested by Kolmogorov- Smirnov （KS） test showed no significant differences （P〉0.05） between the observed and predicted diameter distributions for almost all plots. Using site index and aboveground biomass （AGB） models developed for P. thunbergii in South Korea, a model to predict the AGB per ha for each diameter class and subsequently the total AGB of the stand was created. An application guide was also created, which will serve as a decision-support tool for forest managers in quantifying the future total AGB in P. thunbergii stands located in the eastern coast of South Korea and, subsequently, the quantification of potential carbon stocks aside from being a vital input in designing efficient management and protection strategies for these stands.

关键词： Aboveground biomass Weibull distribution Parameter recovery technique Site index Pinus thunbergii Diameter distribution

Anatomic variations of the intra-hepatic biliary tree in the Caribbean:A systematic review

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World Journal of Gastrointestinal Endoscopy 2021年第6期13卷 170-183页

作者： Shamir O Cawich Alexander Sinanan Rahul R Deshpande Michael T Gardner Neil W Pearce Vijay Naraynsingh Department of Clinical Surgical Sciences University of the West IndiesSt Augustine 000000Trinidad and Tobago Department of Surgery Manchester Royal InfirmaryManchester M139WLUnited Kingdom Department of Anatomy University of the West IndiesKingston KIN7Jamaica Department of Surgery Southampton University NHS TrustSouthampton SO16DPSouthamptonUnited Kingdom

BACKGROUND In the classic descriptions of the human liver,the common hepatic duct forms at the confluence of left and right hepatic *** authors have documented variations in the intra-hepatic ductal system,but to the best of our knowledge there has been no report on bile duct variations in Caribbean *** To evaluate the variations in bile duct anatomy using magnetic resonance cholangiography(MRC)in unselected patients at a major hepatobiliary referral centre in the Eastern *** of the intra-hepatic biliary anatomy is important to optimize service delivery for any physician treating liver and biliary *** This study was carried out at a tertiary referral hospital for hepatobiliary diseases in the Eastern *** retrospectively evaluated magnetic resonance cholangiograms in 152 consecutive patients at this facility over a two-year period from April 1,2017 to March 31,*** consultant radiologists experienced in MRC interpretation reviewed all scans and described biliary anatomy according to the Huang’s classification.A systematic review of published studies was performed and relevant data were extracted in order to calculate the global prevalence of each biliary *** variants in our population were compared to the global *** There were 152 MRCs evaluated in this study in 86 males and 66 *** were 109(71.7%)persons with“classic”biliary anatomy(type A1)and variants were present in 43(28.3%)*** was no statistical relationship between the presence of anatomic variants and gender or *** encountered the following variants:29(19.1%)type A2,7(4.6%)type A3,6(3.95%)type A4,0 type A5 and a single variant(quadrification)that did not fit the classification *** to the global prevalence,our population had a significantly greater occurrence of A1 anatomy(71.7%vs 62.6%;P=0.0227)and A2 trifurcations(19.1%vs 11.5%;P=0.0069),but a significantly lower incidence of A3 varian

关键词： Liver Variant Biliary Duct Intra-hepatic Aberrant Trifurcation,Bifurcation

Biochemical Composition and Anticancer Effect of Different Seaweed Species(In-vitro and In-vivo Studies)

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Sustainable Marine Structures 2019年第2期1卷 5-11页

作者： T·H·Ranahewa A·D·Premarathna R·M·K·K· V·Wijewardana A·P·Jayasooriya R·P·V·J·Rajapakse Department of Veterinary Pathobiology Faculty of Veterinary Medicine and Animal ScienceUniversity of PeradeniyaPeradeniyaSri Lanka Department of Basic Veterinary Sciences Faculty of Veterinary Medicine and Animal ScienceUniversity of PeradeniyaPeradeniyaSri Lanka Department of Basic Veterinary Sciences Faculty of Medical SciencesUniversity of West IndiesTrinidad and TobagoWest Indies Department of Atomic Energy Agency(IAEA)Vienna Austria

Seaweed is an enormous resource comprised with natural bioactive compounds with several therapeutic effects including anticancer *** this context,the biochemical composition of seaweed plays a major *** biochemical compounds isolated from seaweed,fractions of seaweed and crude extracts has revealed ability of seaweed to fight against several cancer *** this contrast seaweed extracts inhibit cancer cell growth and proliferation by inducing apoptosis and by inhibiting metastasis *** this review,biochemical and anticancer properties of seaweeds are discussed and this will provide the basic information to develop a novel chemotherapeutic drug to challenge the cancers.

关键词： Seaweed Biochemical Bioactive Anticancer Apoptosis

An Earthquake Catalogue for El Salvador and Neighboring Central American Countries （1528-2009） and Its Implication in the Seismic Hazard Assessment

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Journal of Civil Engineering and Architecture 2013年第8期7卷 1018-1045页

作者： Walter Salazar Lyndon Brown Walter Hemandez Jose Guerra Seismic Research Centre The University of the West Indies (UWI) St. Augustine Trinidad and Tobago Earthquake Unit The University of the West Indies (UWI) Mona Kingston Jamaica Geological Survey~General Directorate of Environmental Observatory (DGOA) San Salvador El Salvador Oficina de Planificacien del Area Metropolitana de San Salvador (OPAMSS) San Salvador El Salvador

Merging all available databases, a comprehensive and updated earthquake catalogue for El Salvador and surrounding areas has been compiled, containing a total of 2,584 events for the period 1528-2009, covering the geographic window delimited by the coordinates 11.0°-16.5° N and 85.5°-92.0° W, focal depths of 0.0 to 304 km, and the moment magnitudes in the interval 5.0 〈 Mw 〈 8.1. Events in the catalogue are distributed into six seismogenic sources taking into consideration the tectonic regime affecting E1 Salvador, the interplay and complexities between shallow crustal, intraplate and interface subduction seismicity has been thoroughly investigated, primarily with the aim of developing detail criteria to delimit the seismogenic sources in order to perform a consistent seismic hazard assessment. A uniform hazard spectrum for San Salvador and seismic hazard maps and their uncertainty have been calculated for the horizontal component of ground motion for rock site conditions using zone and zone free methods. The references cited in the article constitute a comprehensive list of sources of information on the tectonics and seismicity of El Salvador and neighboring Central American countries.

关键词： Earthquake catalogue tectonics seismogenic sources Gutenberg-Richter relationships seismic hazard.

A Prey- Predator Model for Venture Capital Investment

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Journal of Mathematics and System Science 2017年第11期7卷 297-307页

作者： Letetia Mary Addison Balswaroop Bhatt David Owen Department of Mathematics and Statistics Faculty of Science and Technology The University of the West lndies St. Augustine Campus Trinidad and Tobag

The Rosenzweig-Macarthur Model is used to partially explain Venture Capital investment cycles. Investment opportunities and the experience of the investors, represent the prey and predator respectively. Stability analysis with respect to the interior equilibrium point is performed and dynamics of the system are investigated using numerical simulations and results are presented. The model shows that parameter variation affects the stability of the system and it experiences bifurcations. The results show that stability analysis is useful to provide a Venture Capitalist with the stability ranges of parameters in the system, to improve the quality of the investment process.

关键词： prey- predator stability Hopf bifurcations Venture Capital

Impact of COVID-19 pandemic on radiology education,training,and practice:A narrative review

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World Journal of Radiology 2021年第11期13卷 354-370页

作者： Md Anwarul Azim Majumder Uma Gaur Keerti Singh Latha Kandamaran Subir Gupta Mainul Haque Sayeeda Rahman Bidyadhar Sa Mizanur Rahman Fidel Rampersad Faculty of Medical Sciences The University of the West IndiesCave Hill CampusCave Hill BB23034Barbados Unit of Pharmacology Faculty of Medicine and Defence HealthUniversiti Pertahanan Nasional Malaysia(National Defence University of Malaysia)Kem Perdana Sugai BesiKuala Lumpur 57000Malaysia School of Medicine American University of Integrative Sciences(AUIS)Bridgetown BB11318Barbados Faculty of Medical Sciences The University of the West IndiesSt Augustine CampusSt Augustine 33178Trinidad and Tobago Principal's Office International Medical CollegeDhaka 1207Bangladesh

Radiology education and training is of paramount clinical importance given the prominence of medical imaging utilization in effective clinical *** incorporation of basic radiology in the medical curriculum has continued to evolve,focusing on teaching image interpretation skills,the appropriate ordering of radiological investigations,judicious use of ionizing radiation,and providing exposure to interventional *** in radiology have been driven by the digital revolution,which has,in turn,had a positive impact on radiology education and *** the advent of the corona virus disease 2019(COVID-19)pandemic,many training institutions and hospitals adhered to directives which advised rescheduling of non-urgent outpatient *** inevitably impacted the workflow of the radiology department,which resulted in the reduction of clinical in-person case reviews and consultations,as well as in-person teaching *** medical schools and research centers completely suspended face-to-face academic *** led to challenges for medical teachers to complete the radiology syllabus while ensuring that teaching activities continued safely and *** a result,online teaching platforms have virtually replaced didactic face-to-face *** educators also sought other strategies to incorporate interactive teaching sessions while adopting the e-learning approach,as they were cognizant of the limitations that this may have on students’clinical *** to online methods to review live cases,journal clubs,simulation-based training,clinical interaction,and radiology examination protocolling are a few examples of successfully addressing the limitations in reduced clinical *** this review paper,we discuss(1)The impact of the COVID-19 pandemic on radiology education,training,and practice;(2)Challenges and strategies involved in delivering online radiology education for undergraduates and postgraduates d

关键词： Radiology Education Training Practice COVID-19 pandemic Impact

Is proximity to oil refinery a big factor in explaining differences in gas prices？

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Chinese Business Review 2010年第11期9卷 1-9页

作者： James O. Bukeny Fitzroy White Department of Agribusiness Alabama A ＆M University Normal 35762 USA Center for Urban and Rural Research （CURR） Alabama A＆M University Normal 35762 USA Faculty of Science and Agriculture The University of the West Indies St. Augustine Trinidad

According to the Energy Information Administration, average retail gasoline prices tend to typically be higher in certain states than in others. Aside from taxes, the factors shown to contribute to regional and even local differences in gasoline prices include proximity of supply, supply disruptions, competition in the local market and environmental programs. Of interest in this paper is proximity of supply. It has been hypothesized that areas farthest from the Gulf Coast （the source of nearly half of the gasoline produced in the United States and, thus, a major supplier to the rest of the country） tend to have higher prices. To test this hypothesis, the paper assembles state level monthly retail gasoline data for the period 1983 to 2007 for five states with oil refineries （Alabama, Georgia, Texas, Mississippi and Louisiana） and five states without refineries （Arkansas, Tennessee, North Carolina, South Carolina and Florida）. The analysis employs dynamic correlation, regression, cointegration and vector autoregressive methods. Overall, the results show that retail gas prices in states with refineries and those without refineries tend to move in the same direction over time. The small differences observed over time may suggest that price shocks take a short time to be felt nationwide.

关键词： oil refinery prices time series analysis trend analysis

Garlic:Medicinal Plant and Natural Aromatic Condiment

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Journal of Pharmacy and Pharmacology 2021年第12期9卷 414-419页

作者： Alexis Ruiz León Regina de Caridad Rodríguez Muñoz Ana Elena Rodríguez Cadalso Luis Pablo Ibáñez Silva Eduardo RafaelÁguila Turiño Lesvia Leonides Rodríguez Galdó Úrsula Cristina Pomares Ortega General Hospital Tomás Carreras Galeano Unit Trinidad 62600Sanctis SpíritusCuba Municipal university Center“Julio Antonio Mella”and Filial of Medical Sciences“Elena Fernández de Castro”Units Sanctis SpíritusCuba

Objective:To relate the presence of active metabolites with therapeutic effects of the Allium sativum L whose common name is Garlic,as well as its contraindications and adverse reactions and its use as ***:Searching about the topic in the last 5 years and present a general view of the Allium sativum L whose common name is ***:Technological prevision was based on the search of articles in the Virtual Library in Health(BVS)and using the key words“medicinal plants”/“spice”/Allium sativum L/garlic/adverse reactions and contraindications,and the association among them.

关键词： Medicinal plant Allium sativum L Garlic spice adverse reactions contraindications

Rethinking and strengthening the Global Health Diplomacy through triangulated nexus between policy makers,scientists and the community in light of COVID-19 global crisis

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Global Health Research and Policy 2021年第1期6卷 374-379页

作者： Mohammed AlKhaldi Nigel James Vijay Kumar Chattu Sara Ahmed Hamza Meghari Kirsty Kaiser Carel I.Jsselmuiden Marcel Tanner McGill university Faculty of MedicineMontrealCanada university of Basel BaselSwitzerland Swiss Tropical and Public Health Institute BaselSwitzerland Department of Public Health Unit of Health Systems and PoliciesBaselSwitzerland Council on Health Research for Development COHREDGenevaSwitzerland Health Policy&Demography/Department of Health Policy and Administration The Pennsylvania State UniversityPennsylvaniaUSA Department of Medicine Faculty of MedicineUniversity of TorontoTorontoCanada Institute of International Relations The University of the West IndiesSt.AugustineTrinidad and Tobago Faculty of Medicine School of Physical&Occupational TherapyMcGill University Health CenterClinical EpidemiologyMontrealCanada Centre de recherche interdisciplinaire en réadaptation(CRIR) Constance Lethbridge Rehabilitation Center du CIUSSS du Centre-Ouest-de-l’Île-de-MontréalMontrealCanada Initiative pour le développement de nouvelles technologies et pratiques en réadaptation(INSPIRE) Institut de réadaptation Gingras-Lindsay de MontréalCIUSSS Centre-Est-de-l’ile-de-MontréalMontrealCanada Great Ormond Street Hospital for Children NHS Foundation TrustLondonUK Global Health and Development Institute for Global HealthUniversity College London UCLLondonUK Women Deliver Organization New YorkUSA COHRED Africa Cape TownSouth Africa Epidemiology and Medical Parasitology University of BaselBaselSwitzerland

The COVID-19 pandemic is considerably the biggest global health challenge of this modern *** across all regions of the world,this corona virus disease has disrupted even some of the most advanced economies and healthcare *** an increasing global death toll and no near end in sight,questions on the efficacy of global response mechanisms,including the role and relevancy of global health institutions,have *** a reflexive content analytic approach,this study sheds light on some of these questions,underscoring the disconnect between science,policymaking,and *** health funding approaches;politicization of the pandemic,including political blame gaming;mistrust of government and other institutions;and a lack of robust accountability measures are some of the pandemic response ***,COVID-19 has also presented an opportunity for a collaboration that may potentially solidify global solidarity.A pandemic response built on strategic global health diplomacy,vaccine diplomacy,and science diplomacy can spur both political and economic benefits,advancing development,health security,and *** virus thrives and flourishes in face of political divisions and lack of *** the current global crisis has exacerbated the existing social injustices in societies,national unity and global solidarity is essential to winning the fight against the COVID-19 pandemic.

关键词： COVID-19 Global health diplomacy Vaccine diplomacy And science diplomacy Policy