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Global Geology 2024年第3期27卷 121-131页

作者： Kovalenko s.V. Kezina t.V. Kryuchko E.I. Mironov M.A. Center for the Preservation of Historical and Cultural Heritage of the Amur Region Blagoveshchensk 675000Russia Amur state Univers.t. Blagoveshchensk 675027Russia

A single-layer monument svobodny,ancient man's parking lot-1,discovered in 2021 as part of archaeological work to study the zone of economic development of the Amur region was investigated lithologically and *** on the results of geomorphological analysis of the territory,the study of artifacts,palynological data,as well as analogy with previously identified and sufficiently studied relics in the region,the existence of the Osinoozersk late Neolithic culture in this.t.rritory is *** time of its expansion in the Amur region is determined within the framework of the second half of theⅣmillennium BC to the first half of theⅡmillennium *** preliminary results of palynological analysis suggest the existence of a temperate climate here,was close to the modern one,which does not contradict the reconstructed paleoclimate and environments of the region during the Holocene period.

关键词： Osinoozersk culture palynological spectra Zeya River paleoclimate

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Decision and Coordination of an E-commerce supply Chain Considering Returns and Network Externalities

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Journal of systems science and systems Engineering 2024年第5期33卷 552-575页

作者： Liang shen Fei Lin Yuyan Wang Luping Ding t.C.E.Cheng Dexia Wang school of Public Finance and taxation Shandong University of Finance and Economicsjinan 250014China bschool of Management science and Engineering Shandong University of Finance and EconomicsJinan 250014China PolyU Business school The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077China

Considering the large number of returns in online sales and the network externalities of e-platforms,we develop a decentralized model and a centralized model to explore the impacts of returns and network externalities on e-commerce supply chain(ECsC)*** show that in the decentralized model,the service level,price,market demand,and ECsC members’profits increase with the network externality ***,the service level and price increase,while the market demand and ECsC members’profits decrease with the product return *** centralized model is.t.e optimal operating mode when it is properly *** design the“commission and return cost-sharing”contract to optimize ECsC,in which the proportion of the e-platform’s sharing of the return handling cost is exactly equal to the proportion of the system profit after *** on the decentralized model,we develop two extended models in which we endogenize the impacts of the service level and return rate on the network externality *** comparisons between the extended and decentralized models,we show that high-quality service can improve ECsC’s profitability,while a high return rate hurts its economic performance.

关键词： E-commerce supply chain coordination mechanism network externalities return products

Multi-scale habitat influences sprainting and group size of a freshwater-obligate smooth-coated otter(Lutrogale perspicillata) in tungabhadra Otter Conservation Reserve, India

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Ecological Processes 2024年第1期13卷 159-175页

作者： Ankit Moun P.Ramesh Kumar M.Malathi Priya t.Ramesh Riddhika Kalle sálim Ali Centre for Ornithology and Natural History Deputy Conservator of Forests Bellary Territorial Forest Division Deputy Conservator of Forests Working Plan and Survey and Research WingBellary Territorial Forest Division Centre for Functional Biodivers.t. University of Kwa Zulu-Natal

Background the impact of changing land-use patterns and associated anthropogenic threats on scale-dependent habitat use of semi-aquatic mustelids in scent-marking and social behaviour can provide important insights into the habitat ecology of smooth-coated otters(Lutrogale perspicillata).Methods We sampled 180 stream segments(100–400 m) as spatial replicates of 60 1-km2 s.t.s.t. record indirect evidence(i.e. spraints and mass latrine s.t.s) and group sizes of smooth-coated otters along the tungabhadra Otter Conservation Reserve(tOCR) during the dry season. to quantify habitat, we recorded stream characteristics, riparian vegetation, and anthropogenic disturbances at the local scale, and hydro-environmental characteristics and land uses at the landscape scale. Using Markovian-chain detection and occupancy models, we assessed the multi-scale habitat use of otters in their selection of suitable areas for scent-marking based on repeated presence-absence data on spraint/latrine locations along the tOCR. We further used linear regression techniques.t. explore relationships between the number of individuals in smooth-coated otter group and hydro-environmental characteristics, spraint/latrine encounter rate, anthropogenic pressure, land cover, topography, and *** At the local scale, the probability of spraint depos.t.on and group size decreased with anthropogenic disturbance while the probability of spraint detections decreased with grass cover. At the landscape scale, the probability of otter s.t. use for spraint depos.t.on and group sizes increased in southeast flowing streams. spraint depos.t.on increased with the proportion of sugarcane fields, whereas in contrast, group size decreased with proportion of sugarcane *** Our findings highlight the first empirical evidence on multi-scale habitat use of a southern Indian population of smooth-coated otters in an inland freshwater ecosystem surrounded by the scrub jungle–agriculture matrix. We sug

关键词： Presence-absence modelling Inland river Freshwater ecosystem semi-aquatic mammal smooth-coated otter

Risk scores for allograft failure: Are they still useful in liver recipients from donation after circulatory death?

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World Journal of transplantation 2024年第4期14卷 95-100页

作者： Mohamed H Mohamed Chairi Mónica Mogollón González Jennifer triguero Cabrera Inmaculada segura Jiménez Maria t Villegas Herrera Jesús M Villar del Moral transplant surgery Division Department of SurgeryVirgen de las Nieves University HospitalGranada 18013AndalusiaSpain

BACKGROUND Liver grafts from donation after circulatory death(DCD)are associated with a higher risk of early graft dysfunction,determined by the warm ischemia and cold ischemia *** is essential to have precise criteria to identify this complication in order to guide therapeutic *** to validate different graft and recipient survival scores in patients undergoing liver transplantation(Lt)with DCD *** A retrospective and observational unicentric study was conducted on 65 Lt patients with grafts obtained from controlled DCD donors from November 2013 to November *** United Kingdom(UK)risk score,early allograft dysfunction(EAD)Olthoff score,and model for early allograft function(MEAF)score were used to evaluate the risk of graft and recipient survival *** survival analysis purposes,we used the Kaplan-Meier method,and the differences between subgroups were compared using the log-rank(Mantel-Cox)*** sixty-five patients were included in the *** UK risk score did not demonstrate predictive capacity for recipient or graft ***,in donors aged over 70 years old(18.4%),it significantly predicted graft survival(Pto Kaplan-Meier survival curves,graft survival rates at 6 months,2 years,and 5 years in the futility group dramatically decreased to 50%compared to the other groups(log-rank 8.806,Pthe EAD Olthoff and MEAF scores did not demonstrate predictive capacity for recipient or graft *** on Kaplan-Meier survival curves,patients with a MEAF score≥7 had a lower graft survival rate at 6 months,2 years,and 5 years compared to patients with a lower MEAF score(log-rank 4.667,PsION In our series,both UK DCD risk score and MEAF score showed predictive capability for graft survival.

关键词： Liver transplantation Donation after circulatory death Early allograft dysfunction Risk scores Graft surviva

Potential applications of 7 tesla magnetic resonance imaging in paediatric neuroimaging:Feasibility and challenges

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World Journal of Clinical Pediatrics 2024年第2期13卷 1-6页

作者： Arosh s Perera Molligoda Arachchige Letterio s Politi Final Year Medical student Faculty of MedicineHumanitas UniversityPieve Emanuele 20089Italy Department of Neuroradiology IRCCS Humanitas Research HospitalRozzano 20089MilanItaly Department of Biomedical sciences Humanitas UniversityPieve Emanuele 20072MilanItaly

the integration of 7 tesla magnetic resonance imaging(7 t MRI)in adult patients has marked a revolutionary stride in *** this article we explore the feasibility of 7 t MRI in paediatric practice,emphasizing its feasibility,applications,challenges,and safety *** heightened resolution and tissue contrast of 7 t MRI offer unprecedented diagnostic accuracy,particularly in *** range from neuro-oncology to neonatal brain imaging,showcasing its efficacy in detecting subtle structural abnormalities and providing enhanced insights into neurological *** the promise,challenges such as high cost,discomfort,and safety concerns necess.t.te careful *** suggests.t.at,with precautions,7 t MRI is feasible in paediatrics,yet ongoing studies and safety assessments are imperative.

关键词： 7 tesla magnetic resonance imaging Pediatric imaging Feasibility Challenges

Current considerations for the surgical management of gallbladder adenomas

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World Journal of Gastrointestinal surgery 2024年第6期16卷 1507-1512页

作者： Efstathios.t.Pavlidis Ioannis N Galanis.t.eodoros E Pavlidis the second Department of Propaedeutic surgery Hippokration General HospitalSchool of MedicineAristotle University of ThessalonikiThessaloniki 54642Greece

Gallbladder adenomas are rare lesions(0.5%)associated with potential malignant transformation,particularly with gallbladder adenomas.t.at are≥1 cm in *** detection and management are crucial for preventing lethal carcinoma *** polyps can often be distinguished from the more often nonneo-plastic cholesterol pseudopolyps(5%-10%),which are *** is.t.e first-line tool for initial diagnosis and follow-up when *** question is whether cholecystectomy is always necessary for all *** manage-ment of gallbladder adenomas is determined according to the size of the tumor,the growth rate of the tumor,the patient’s symptoms and whether risk factors for malignancy are ***≥1 cm in size,an age>50 years and a familial history of gallbladder carcinoma are indications for immediate laparoscopic ***,ultrasound follow-up is *** adenomas 6-9 mm in size,the absence of≥2 mm growth at 6 months,one year,and two years,as well as an adenoma sizedthout existing risk factors indicates.t.at no further surveillance is ***,it would be preferable to individualize the management in doubtful *** interventional modalities for preserving the gallbladder need further evaluation,especially to determine the long-term outcomes.

关键词： Biliary diseases true neoplastic polyps Gallbladder adenomas Benign bi-liary tumors Gallbladder polyps Extrahepatic biliary neoplasms

theoretical and experimental investigations on an X-shaped vibration isolator with active controlled variable stiffness

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Applied Mathematics and Mechanics(English Edition) 2024年第8期45卷 1371-1386页

作者： Zeyu CHAI J.t.HAN Xuyuan sONG Jian ZANG Yewei ZHANG Zhen ZHANG College of Aerospace Engineering Shenyang Aerospace UniversityShenyang 110136China Jacobs school of Engineering University of California San DiegoSan Diego CA 92122U.S.A. Key Laboratory of Vibration and Control of Aero-Propulsion system Ministry of EducationNortheastern UniversityShenyang 110819China

A novel X-shaped variable stiffness vibration isolator(X-VsVI)is *** Runge-Kutta method,harmonic balance method,and wavelet transform spectra are introduced to evaluate the performance of the X-VsVI under various *** layer number,the installation angle of the X-shaped structure,the stiffness,and the active control parameters are systematically *** addition,a prototype of the X-VsVI is manufactured,and vibration tests are carried *** results show that the proposed X-VsVI has a superior adaptability to that of a traditional X-shaped mechanism,and shows excellent vibration isolation performance in response to different amplitudes and forms of ***,the vibration isolation efficiency of the device can be improved by appropriate adjustment of parameters.

关键词： bionic vibration isolation X-shaped structure variable stiffness structure nonlinear dynamics prototype experiment

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A nano-plasmonic HMIM waveguide based concurrent dual-band BPF using circular ring resonator

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Optoelectronics Letters 2024年第3期20卷 152-156页

作者： Miriyala sridhar surendra Kumar Bitra ts N Murthy Koppireddi Padmaraju Department of Electronics and Communication Engineering Koneru Lakshmaiah Education FoundationGunturIndia Astra Microwave Products Ltd. HyderabadIndia Department of Electronics and Communication Engineering JNTU-GV College of EngineeringVizianagaramIndia Department of Electronics and Communication Engineering Jawaharlal Nehru Technological University KakinadaKakinadaIndia

this article analyzes.t.e transmission line characteristics of plasmonic hybrid metal insulator metal(HMIM) wave-guide, circular ring resonator(CRR) based dual-band band-pass filters with two transmission poles in both pass-bands in the optical regime using coupled line feed. the transmission line characteristics of an HMIM waveguide, such as characteristic impedance(Z_(PV)), effective refractive index(n_(eff)) and propagation length(L_(spp)), have been obtained by using full wave simulation.

关键词： waveguide resonator circular

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初中生 2024年第21期 22-23页

作者： t.s.艾略特不详

我们在生存中迷失的生活在哪里?我们在知识中遗失的智慧在哪里?我们在信息中丢失的知识在哪里?

关键词：遗失信息智慧

Chronic hepatitis B and occult infection in chemotherapy patients-evaluation in oncology and hemato-oncology s.t.ings.t.e CHOICE study

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World Journal of Virology 2024年第1期13卷 61-68页

作者： Nayana sudevan Manish Manrai t V s V G K tilak Harshit Khurana Harikrishnan Premdeep Department of Internal Medicine Armed Forces Medical CollegePune 411040India Department of Gastroenterology Command Hospital Cantonment RdSadar BazaarCantonmentLucknowUttar PradeshIndia 226002 Department of Internal Medicine Command HospitalBangalore 560007India Department of Geriatric Medicine Armed Forces Medical CollegePune 411040India

BACKGROUND Reactivation of hepatitis B virus(HBV)infection is a well-known risk that can occur spontaneously or following immunosuppressive therapies,including cancer *** reactivation can cause significant morbidity and even mortality,which are preventable if at-risk individuals are identified through screening and started on antiviral *** to determine the prevalence of chronic HBV(CHB)and occult HBV infection(OBI)among oncology and hematology-oncology patients undergoing *** In this observational study,the prevalence of CHB and OBI was assessed among patients receiving *** markers of HBV infection[hepatitis B surface antigen(HBsAg)/anti-hepatitis B core antigen(HBc)]were evaluated for all *** DNA levels were assessed in those who tested negative for HBsAg but pos.t.ve for total *** the prevalence of CHB in the study cohort was determined to be 2.3%[95%confidence interval(95%CI):1.0-4.2].Additionally,the prevalence of OBI among the study participants was found to be 0.8%(95%CI:0.2-2.3).CONCLUsION the findings of this study highlight the importance of screening for hepatitis B infection in oncology and hematology-oncology patients undergoing *** individuals with CHB and OBI is crucial for implementing appropriate antiviral prophylaxis.t. prevent the reactivation of HBV infection,which can lead to increased morbidity and mortality.

关键词： Hepatitis B virus Chronic hepatitis B Occult B infection Oncology Hepatitis B reactivation Hematologyoncology