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Spatial-temporal modeling of initial COVID-19 diffusion: The cases of the Chinese Mainland and Conterminous United States

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Geo-Spatial Information Science 2021年第3期24卷 340-362页

作者： daniel Griffith Bin Li Department of Geography&Environmental Studies Central Michigan UniversityMount PleasantMichiganUnited States School of Economic Political and Policy SciencesThe University of Texas at DallasRichardsonTexasUnited States

COVID-19 outbreaks in China in late December 2019,then in the United States(US)in early *** the initial wave of diffusion,the virus respectively took 14 and 33 days to spread across the provinces/states in the Chinese mainland and the coterminous US,during which there are 43%and 70%zero entries in the space-time series for China and US respectively,indicating a zero-inflated count process.A logistic growth curve as a function of the number of days since the first case appeared in each of these countries accurately portrays the national aggregate per capita rates of infection for *** paper presents two space-time model specifications,one based upon the generalized linear mixed model,and the other upon Moran eigenvector space-time filtering,to describe the spread of COVID-19 in the initial 19 and 58 days across the Chinese mainland and the coterminous US,*** from these case studies show both models shed new light on the role of spatial structures in COVID-19 diffusion,models that can forecast new cases in subsequent days.A principal finding is that describing the spatiotemporal diffusion of COVID-19 benefits from including a hierarchical structural component to supplement the commonly employed contagion component.

关键词： COVID-19 contagion diffusion hierarchical diffusion moran eigenvector spatial-time filtering random effects

Watershed prioritization for conservation planning using RUSLE and morphometric methods,Northwestern Ethiopia

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Journal of Mountain Science 2023年第8期20卷 2242-2262页

作者： Agumassie Genet GELA daniel Ayalew MENGISTU daniel Asfaw BEKELE Department of General Forestry Debre Markos UniversityBure 18Ethiopia Department of Geography and Environmental Studies Bahir Dar UniversityBahir Dar 79Ethiopia Geo-spatial Data and Technology Center(GDTC) Bahir Dar UniversityBahir Dar 79Ethiopia

Soil erosion and the subsequent sedimentation are serious environmental *** land management coupled with intense rainfall has complicated the problem in the Ethiopian ***,soil loss costs a profound amount of the national GDP and deters land *** soil loss and prioritizing areas for conservation is imperative for proper planning and resource ***,this study aimed at estimating the mean annual soil loss rate of Gilgel Abay watershed which has critical implications on Lake Tana and Abbay River(Upper Blue Nile River),using RUSLE and morphometric analysis *** including rainfall,soil,Digital Elevation Model and land use/land cover were used to generate important parameters required for the soil loss *** collected through field observation,consultation with experts and document analysis were used for validation *** results of the study reveal that the watershed experienced an average soil loss rate of 39.8 t ha^(-1)yr^(-1).Subsequently,nearly 25%(37,038 ha)of the watershed is threatened by moderate to very severe soil *** the four sub watersheds,sub watershed 3(S3)and sub watershed 4(S4),which consist of about 65%(105,000 ha)of the total area of the study watershed,experienced an annual soil loss rate of over 30 t ha^(-1)yr^(-1).The amount of soil loss that the study watershed has experienced is above the soil loss tolerance level of Ethiopia(2-18 t ha^(-1)yr^(-1))and the tropical region(10 t ha^(-1)yr^(-1)).Similarly,the results of morphometric analysis showed that the studied watershed has S-shaped hypsometric curve,an indication for maturity stage of landscape *** studied watershed is also characterized by a non-circular shaped drainage with rugged and dissected topography that contributes to high flash flood,peak discharge and incidence of soil *** result of both models signified that S3 and S4 are highly susceptible to soil ***,t

关键词： Soil loss RUSLE model Morphometric analysis Gilgel Abay watershed

Genomic predictors for treatment of late stage prostate cancer

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Asian Journal of Andrology 2016年第4期18卷 586-591页

作者： daniel H Shevrin Department of Medicine Division of Hematology/Oncology NorthShore University HealthSystem 2650 Ridge Avenue Evanston Illinois 60201 USA

In spite of the development of new treatments for late stage prostate cancer, significant challenges persist to match individuals with effective targeted therapies. Genomic classification using high-throughput sequencing technologies has the potential to achieve this goal and make precision medicine a reality in the management of men with castrate-resistant prostate cancer. This chapter reviews some of the most recent studies that have resulted in significant progress in determining the landscape of somatic genomic alterations in this cohort and, more importantly, have provided clinically actionable information that could guide treatment decisions. This chapter reviews the current understanding of common alterations such as alterations of the androgen receptor and PTEN pathway, as well as ETS gene fusions and the growing importance of PARP inhibition. It also reviews recent studies that characterize the evolution to neuroendocrine tumors, which is becoming an increasingly important clinical problem. Finally, this chapter reviews recent innovative studies that characterize the compelling evolutionary history of lethal prostate cancer evidenced by polyclonal seeding and interclonal cooperation between metastasis and the importance of tumor clone dynamics measured serially in response to treatment. The genomic landscape of late stage prostate cancer is becoming better defined, and the prospect for assigning clinically actionable data to inform rationale treatment for individuals with this disease is becoming a reality.

关键词： advanced prostate cancer genomic alterations lethal prostate cancer precision medicine targeted therapy whole-genomesequencing

Some Univalence Conditions for a General Integral Operator

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Chinese Annals of Mathematics,Series B 2012年第6期33卷 801-806页

作者： Laura STANCIU daniel BREAZ Department of Mathematics University of Pitesti Department of Mathematics University of Alba Iulia

The authors consider the classes of the univalent functions denoted by SH(β),SP and SP(α,β).On these classes,the univalence conditions for a general integral operator are studied.

关键词： Analytic function Integral operator Univalence condition GeneralSchwarz lemma

Pedestrian walking speed at un-signalized midblock crosswalk and its impact on urban street segment performance

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Journal of Traffic and Transportation Engineering(English Edition) 2021年第1期8卷 57-69页

作者： Albert Forde Janice daniel Division of Statewide Planning New Jersey Department of TransportationTrentonNJ 08625USA Department of Civil and Environmental Engineering New Jersey Institute of TechnologyNewarkNJ 07102USA

The Urban Street Segment Chapter of the Highway Capacity Manual(HCM)includes a methodology for evaluating the level of service urban street segments provide to automobile *** methodology does not account for pedestrian activity at un-signalized midblock crosswalk on an urban street *** activity at un-signalized midblock crosswalk on urban street segments causes friction conditions between automobiles and *** a consequence,the average time it takes vehicles to travel along the segment is *** segment running time decreases both the travel speed of automobiles and the level of service provided to automobile *** is an inverse relationship between the delay incurred by interrupted vehicles and the speeds at which pedestrians walk while crossing at *** account for this delay,there is a need to investigate pedestrian walking speeds at un-signalized midblock *** study measured pedestrian walking speeds by age-group at two un-signalized midblock crosswalks on urban street *** first objective of this paper is to perform statistical analyses to examine the measured free-flow pedestrian walking *** second objective is to demonstrate how the findings of this study can be incorporated into the Urban Street Segment Analysis Chapter of the *** walking speeds were recorded and analyzed for 2937 *** results show teenagers walk at an average speed of 1.45 m/s,young adults walk at an average speed of 1.55 m/s,middle age pedestrians walk at a speed of 1.45 m/s,older pedestrians walk at speed of 1.09 m/s,and elderly or physically disabled pedestrians walk at a speed of 1.04 m/s.

关键词： Midblock Pedestrian Walking speed HCM Urban Street

The Levine laboratory and the discovery of p53

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Journal of Molecular Cell Biology 2019年第7期11卷 534-535页

作者： daniel Linzer Research Corporation for Science Advancement TucsonAZ 85712USA

As a first-year graduate student in the fall of 1976,1 completed a research rotation on DNA tumor viruses in Arnie Levine's laboratory at Princeton and then decided on that research area and research group for my doctoral *** welcomed me into his laboratory with his typically infectious enthusiasm and high *** the time,graduate students and postdoctoral fellows in the group were working on a number of DNA viruses.

关键词： graduate research viruses

Dry coal fly ash cleaning using rotary triboelectrostatic separator

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Mining Science and Technology 2009年第5期19卷 642-647页

作者： TAO daniel Department of Mining Engineering University of Kentucky

More than 80 million metric tons of fly ash is produced annually in the U.S. as coal combustion by-product. Coal fly ash can be converted to value-added products if unburned carbon is reduced to less than 2.5%. However, most of fly ash is currently landfilled as waste due to lack of efficient purification technologies to separate unburned carbon from fly ash. A rotary triboelectrostatic separator has been developed and patented recently at the University of Kentucky with unique features. Several fly ash samples have been used to understand the effects of major process parameters on the separation performance. The results show that compared to existing triboelectrostatic separators, the rotary triboelectrostatic separator has significant advantages in particle charging efficiency, solids throughput, separation efficiency, applicable particle size range.

关键词： coal combustion waste fly ash particle charging separation

Re-evaluation of classical prognostic factors in resectable ductal adenocarcinoma of the pancreas

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World Journal of Gastroenterology 2016年第28期22卷 6424-6433页

作者： daniel Akerberg daniel Ansari Roland Andersson Department of Surgery Clinical Sciences Lund Lund University and Skane University Hospital SE-221 85 Lund Sweden

Pancreatic ductal adenocarcinoma carries a poor prognosis with annual deaths almost matching the reported incidence rates. Surgical resection offers the only potential cure. Yet, even among patients that undergo tumor resection, recurrence rates are high and long-term survival is scarce. Various tumorrelated factors have been identified as predictors of survival after potentially curative resection. These factors include tumor size, lymph node disease, tumor grade, vascular invasion, perineural invasion and surgical resection margin. This article will re-evaluate the importance of these factors based on recent publications on the topic, with potential implications for treatment and outcome in patients with pancreatic cancer.

关键词： Pancreatic cancer Survival Prognostic factors

Two-tiered reconstruction of Late Pleistocene to Holocene changes in the freezing level height in the largest glacierized areas of the Colombian Andes

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Journal of Mountain Science 2022年第3期19卷 615-636页

作者： daniel RUIZ-CARRASCAL daniel GONZALEZ-DUQUE Isabel RESTREPO-CORREA Department of Ecology Evolution and Environmental BiologyColumbia University in the City of New YorkNew YorkNY 10027USA Department of Civil and Environmental Engineering Vanderbilt University40024th Avenue South269 Jacobs HallNashville TN 3720USA Department of Earth Sciences Universidad EAFITCarrera 49 No.7Sur-50MedellínColombia

One way of deducing vertical shifts in the altitudinal distribution of Colombian high-altitude páramo environments is by inferring fluctuations in the height of the local freezing *** our research,we are implementing two complementary approaches to reconstruct Late Pleistocene to Holocene changes in the freezing level height(FLH)in two of the most extensively glacier-covered areas of the northern *** combined remote sensing and field-based geomorphological mapping with time-series reconstruction of changes in the altitude of the 0°C *** in the FLH were based on alreadypublished~30 kyr paleo-reconstructions of sea surface temperatures(SSTs)of the eastern tropical Pacific and the western tropical Atlantic,as well as on reconstructed long-term sea level changes and empirical orthogonal functions of present-day(historical)Indo-Pacific and tropical Atlantic SST *** also analyzed the probability distribution of air-sea temperature differences and the spatial distribution of grid points with SSTs above the minimum threshold necessary to initiate deep *** considered available historical nearsurface and free air temperature data of ERA-Interim reanalysis products,General Circulation Model(GCM)simulations,weather stations,and(deployed by our group)digital sensors,to assess the normal Environmental Lapse Rates(ELRs)at the regional to local *** combined maps of glacial landforms and our reconstructed FLHs provided us with a wellfounded inference of potential past glacier advances,narrowing down the coarse resolution of ice margins suggested by previous research *** extent of the areas with temperatures below the freezing point suggested here for the summits of our main study site exceeds in magnitude the corresponding glacier icecaps and front advances proposed by previous ***,our average lowest altitudes of the FLH for our comparative site are consistently above the main glacier-front advances previously su

关键词： Glacial events Colombian Andes Climate reconstruction Geomorphology Mountain glaciers Freezing level height