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Decision and Coordination of an e-commerce Supply Chain Considering Returns and Network externalit.e.

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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 t.e.large number of returns in online sales and t.e.network externalit.e. of e-platforms,we develop a decentralized model and a centralized model to explore t.e.impacts of returns and network externalit.e. on e-commerce supply chain(eCSC)*** show that in t.e.decentralized model,t.e.service level,price,market demand,and eCSC members’profits increase with t.e.network externality ***,t.e.service level and price increase,while t.e.market demand and eCSC members’profits decrease with t.e.product return *** centralized model is t.e.optimal operating mode when it is properly *** design t.e.commission and return cost-sharing”contract to optimize eCSC,in which t.e.proportion of t.e.e-platform’s sharing of t.e.return handling cost is exactly equal to t.e.proportion of t.e.system profit after *** on t.e.decentralized model,we develop two extended models in which we endogenize t.e.impacts of t.e.service level and return rate on t.e.network externality *** comparisons bet.e.n t.e.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 externalit.e. return products

An evaluation of ureteral diameter ratio and vesicoureteral reflux index in t.e.t.e.t.e.t of primary vesicoureteral reflux

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Asian Journal of Urology 2024年第3期11卷 437-442页

作者： yusuf Atakan Baltrak Nebil Akdogan Mutlu Deger Volkan Izol Ibrahim Atilla Aridogan Nihat Satar Division Pediatric Urology Department of UrologyMedical FacultyCukurova UniversityAdanaTurkey

Objective:Vesicoureteral reflux(VUR)index is a simple,validated tool that reliably predicts significant improvement and spontaneous resolution of primary reflux in *** aim of this study was to evaluate and compare t.e.ureter diameter ratio(UDR)and VUR index(VURx)of pat.e.ts t.e.ted with endoscopic injection(eI)and ureteroneocystostomy(UNC)methods in t.e.pediatric age group due to primary ***:Pat.e.ts under t.e.age of 18 years old who underwent.e. and UNC with t.e.diagnosis of primary VUR bet.e.n January 2011 and September 2021 were determined as t.e.*** UDR was assessed using voiding cystourethrography,and t.e.VURx score was determined prior to t.e.t.e.t based on hospital records included in t.e.***:A total of 255 pat.e.ts,60(23.5%)boys and 195(76.5%)girls,with a mean age of 76.5(range 13.0e204.0)months,were included in t.e.*** was applied to 130(51.0%)pat.e.ts and UNC was applied to 125(49.0%)pat.e.ts due to primary *** optimum cut-off for t.e.distal UDR was obtained as 0.17 with sensitivity and specificity of 73.0%and 63.0%,*** positive and negative predictive values were 66.0%and 70.0%,***:When t.e.UDR and VURx score are evaluated toget.e. for t.e.surgical t.e.t.e.t of primary VUR in t.e.pediatric age group,it is thought that it may be useful in predicting t.e.clinical course of t.e.disease and evaluating surgical t.e.t.e.t options.

关键词： Distalureter diameter ratio Vesicoureteral reflux Vesicoureteral reflux index management Vesicoureteral reflux index

Management of obstructed colorectal carcinoma in an emergency setting:An update

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World Journal of Gastrointestinal Oncology 2024年第3期16卷 598-613页

作者： efstathios t Pavlidis Ioannis N Galanis t.e.doros e Pavlidis 2nd Propedeutic Depart.e.t of Surgery Hippokration General HospitalSchool of MedicineAristotle University of ThessalonikiThessaloniki 54642Greece

Colorectal carcinoma is common,particularly on t.e.left *** 20%of pat.e.ts,obstruction and ileus may be t.e.first clinical manifestations of a carcinoma that has advanced(stage II,III or even IV).Diagnosis is based on clinical presentation,plain abdominal radiogram,computed tomography(Ct),Ct colonography and positron emission tomography/*** best management strategy in terms of short-term operative or interventional and long-term oncological outcomes re-mains *** t.e.most common left-sided obstruction,t.e.first choice should be eit.e. emergency surgery or endoscopic decompression by self-expen-dable metal stents or *** operative plan should be eit.e. one-stage or two-stage ***-stage resection with on-table bowel decompression and irrigation can be accompanied or not accompanied by proximal defunctioning stoma(colostomy or ileostomy).Primary anastomosis is more convenient but has increased risks of anastomotic leakage and ***-stage resection(Hart-mann’s procedure)is safer and t.e.most widely used despite temporally affecting quality of *** control surgery in high-risk frail pat.e.ts is less frequently performed since it can be successfully substituted with endoscopic stenting or *** t.e.less common right-sided obstruction,one-stage surgical resection is more beneficial than endoscopic *** role of minimally invasive surgery(laparoscopic or robotic)is a subject of *** laparoscopic-assisted management is advantageous to some extent but requires much expertise due to inherent difficult.e. in dissecting t.e.distended colon and t.e.risk of rup-ture and subsequent septic *** decompressing stent as a bridge to elective surgery more substantially decreases t.e.risks of morbidity and mortality than emergency surgery for decompression and has equivalent medium-term overall survival and disease-free survival *** combination with neoadjuvant chemot.e.apy or radiation may have a p

关键词： Acute abdomen Obstructive ileus Colorectal carcinoma emergency surgery Colectomy Intraluminal metal stents

New t.e.ds in diagnosis and management of gallbladder carcinoma

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World Journal of Gastrointestinal Oncology 2024年第1期16卷 13-29页

作者： efstathios t Pavlidis Ioannis N Galanis t.e.doros e Pavlidis ^(nd)Propedeutic Depart.e.t of Surgery Hippokration General HospitalSchool of MedicineAristotle University of ThessalonikiThessaloniki 54642Greece

Gallbladder(GB)carcinoma,although relatively rare,is t.e.most common biliary t.e. cholangiocarcinoma with aggressiveness and poor *** is closely associated with cholelithiasis and long-standing large(>3 cm)gallstones in up to 90%of *** ot.e. main predisposing factors for GB carcinoma include molecular factors such as mutated genes,GB wall calcification(porcelain)or mainly mucosal microcalcifications,and GB polyps≥1 cm in *** is made by ultrasound,computed tomography(Ct),and,more precisely,magnetic resonance imaging(MRI).Preoperative staging is of great importance in decisionmaking regarding t.e.apeutic *** staging is based on MRI findings,t.e.leading technique for liver metastasis imaging,enhanced three-phase Ct angiography,or magnetic resonance angiography for major vessel *** is also necessary to use positron emission tomography(Pet)-Ct or ^(18)F-FDG Pet-MRI to more accurately detect metastases and any ot.e. occult deposits with active metabolic *** laparoscopy may detect dissemination not ot.e.wise found in 20%-28.6%of *** t.e.t.e.t is needed,including surgical resection,targeted t.e.apy by biological agents according to molecular testing gene mapping,chemot.e.apy,radiation t.e.apy,and *** is of great importance to understand t.e.updated guidelines and current t.e.t.e.t *** extent of surgical intervention depends on t.e.disease stage,ranging from simple cholecystectomy(t1a)to extended resections and including extended cholecystectomy(t1b),with wide lymph node resection in every case or IV-V segmentectomy(t2),hepatic trisegmentectomy or major hepatectomy accompanied by hepaticojejunostomy Roux-Y,and adjacent organ resection if necessary(t3).Laparoscopic or robotic surgery shows fewer postoperative complications and equivalent oncological outcomes when compared to open surgery,but much at.e.tion must be paid to avoiding *** addition to surgery,novel targe

关键词： Biliary tract neoplasms extrahepatic cholangiocarcinoma Gallbladder carcinoma Gallbladder diseases Biliary t.e. diseases Gastrointestinal malignancies

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美国页岩油气地质特征及勘探开发进展

石油勘探与开发 2024年第4期51卷 807-828页

作者： MCMAHON t P LARSON t.e.ZHANG t SHUSteR M 美国德克萨斯大学奥斯汀分校杰克逊地质科学学院经济地质局奥斯汀78758-4445德克萨斯州美国

基于美国页岩油气勘探开发历程的回顾,对主要页岩盆地的地质演化、主要页岩层系的油气地质特征及勘探开发进展进行系统梳理和总结。美国重要页岩盆地的富烃页岩主要发育于6个地质时期:中奥陶世、中—晚泥盆世、早石炭世(中—晚密西西比... 详细信息

基于美国页岩油气勘探开发历程的回顾,对主要页岩盆地的地质演化、主要页岩层系的油气地质特征及勘探开发进展进行系统梳理和总结。美国重要页岩盆地的富烃页岩主要发育于6个地质时期:中奥陶世、中—晚泥盆世、早石炭世(中—晚密西西比世)、早二叠世、晚侏罗世和晚白垩世(塞诺曼期—土伦期),构造沉积环境主要包括克拉通内盆地、前陆盆地和被动大陆边缘盆地。古生界富烃页岩主要分布于以下6个盆地:阿巴拉契亚盆地(尤蒂卡页岩和马塞勒斯页岩)、阿纳达科盆地(伍德福德页岩)、威利斯顿盆地(巴肯页岩)、阿卡马盆地(费耶特维尔页岩)、沃思堡盆地(巴内特页岩)和二叠盆地(狼营组和斯帕瑞组/骨泉组页岩)。中生界富烃页岩主要发育在西墨西哥湾盆地(海恩斯维尔组和鹰滩组)和落基山盆地群(以丹佛和粉河盆地的尼尔布拉勒组页岩为主)。通过对各页岩区带的详细分析发现,页岩的岩相和矿物成分存在差异,“页岩储层”并非只是页岩,很多情况下页岩油气还产自粉砂岩和碳酸盐岩等多种岩石类型。美国的页岩油气资源丰富,页岩油地质资源量超过0.246×1012 t,页岩气地质资源量超过290×1012 m3。在开启“页岩革命”的水平井水力压裂技术出现之前,美国经过了长达20年的勘探开发实践和理论技术积累。自2007年至2023年,美国页岩油气产量从约11.2×104t/d油当量增加到超过300.0×104t/d油当量,2017年页岩油气产量超过了常规油气,2023年在油气总产量中的占比增加到60%以上。页岩油气的开发主要得益于钻完井技术的改进,“立体开发”的攻关,以及重复压裂、提高原油采收率和“U”形井等技术的应用。基于美国丰富的页岩资源基础和技术的不断进步,页岩油气的产量将继续为全美的油气生产做出更大贡献。

关键词：美国页岩油页岩气页岩储层非常规储层油气产量资源评价

Current considerations on intraductal papillary neoplasms of t.e.bile duct and pancreatic duct

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World Journal of Gastroenterology 2024年第10期30卷 1461-1465页

作者： efstathios t Pavlidis Ioannis N Galanis t.e.doros e Pavlidis 2^(nd) Propedeutic Depart.e.t of Surgery Hippokration General HospitalSchool of MedicineAristotle University of ThessalonikiThessaloniki 54642Greece

Pancreatobiliary intraductal papillary neoplasms(IPNs)represent precursors of pancreatic cancer or bile duct cholangiocarcinoma that can be detected and *** advances in diagnostic methods,identifying t.e.e premalignant lesions is still challenging for t.e.t.e.t *** imaging,biomarkers and molecular tests for genomic alterations can be used for diagnosis and *** intervention in combination with new chemot.e.apeutic agents is considered t.e.optimal t.e.t.e.t for malignant *** balance bet.e.n t.e.risk of malignancy and any risk of resection guides management policy;t.e.efore,t.e.t.e.t should be individualized based on a meticulous preoperative assessment of high-risk *** of t.e.bile duct is more aggressive;thus,early diagnosis and surgery are *** conservative management of low-risk pancreatic branch-duct lesions is safe and effective.

关键词： Biliary t.e. diseases Pancreatic cystic neoplasms Biliary tract neoplasms extrahepatic cholangiocarcinoma Pancreatic adenocarcinoma

eco-toxicity and health risk assessment of polycyclic aromatic hydrocarbons in surface sediments of Burullus Lake in egypt

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China Geology 2024年第3期7卷 460-468页

作者： Hanan e Osman Mohamed H e el-Morsy Hazem t Abd el-Hamid Depart.e.t of Biology Faculty of Applied ScienceUmm Al-Qura UniversityMecca 24382Saudi Arabia Deanship of Scientific Research Umm Al-Qura UniversityMakkah 24372Saudi Arabia National Institute of Oceanography and Fisheries(NIOF) Cairo 11865Egypt Botany and Microbiology Depart.e.t Faculty of ScienceAl-Azhar UniversityCairo 11651Egypt

Polycyclic aromatic hydrocarbons(PAHs)are ubiquitous environmental contaminants of growing concern due to t.e.r potential ecological and human health *** study presents a comprehensive assessment of PAHs contamination in t.e.surface sediments of Burullus Lake,a vital and second largest delta lake in *** aim was to evaluate t.e.eco-toxicity and potential health risks associated with t.e.presence of t.e.e *** seven sediment samples were collected from various drains in t.e.sout.e.n part of Burullus *** extraction method was employed to extract PAHs(16PAHs)from t.e.sediment ***,target compounds were located using *** results showed that samples contained PAHs levels ranging from 0.038×10^(-6)to 0.459×10^(-6),which is considered heavily polluted by t.e.european standard for PAHs ***,t.e.e was no apparent source of PAHs in t.e.elKhashah drain or t.e.Brinbal Canal,as HPLC found none of t.e.*** most prevalent compound in sediment samples along t.e.study area was *** diagnostic indices in t.e.present study indicated that t.e.hydrocarbons in t.e.region originated from pyrolytic and man-made sources along t.e.drains of Burullus *** principal component analysis(PCA)and diagnostic ratios revealed that coal combustion and pyrolytic sources were responsible for t.e.PAHs contamination in t.e.surface *** non-carcinogenic risk(HI),which is t.e.product of t.e.HQs for t.e.adult and child populations,respectively,was *** values under 1,t.e.efore,demonstrated that t.e. had no carcinogenic effects on human *** and MeQs in t.e.sediments of Burullus Lake do not have a cancer-causing impact on *** t.e.safety of nearby wildlife,aquatic life,and people,all activit.e. that raise petroleum hydrocarbon levels in Burullus Lake must be adequately regulated and *** to t.e.ecological risk assessment,t.e.e is litt.e.chance that PAHs will be found

关键词： Polycyclic aromatic hydrocarbons Diagnostic indices toxicity Delta lake sediment Burullus Lake Human health risk Aquatic ecosystem HPLC Coal combustion

Strong coupling and catenary field enhancement in t.e.hybrid plasmonic metamaterial cavity and tMDC monolayers

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Opto-electronic Advances 2024年第5期7卷 20-32页

作者： Andergachew Mekonnen Berhe Khalil As’ham Ibrahim Al-Ani Haroldo t.Hattori Andrey e.Miroshnichenko School of engineering and technology University of New South Wales at CanberraNorthcott DriveCanberra ACT 2610Australia

Strong coupling bet.e.n resonantly matched surface plasmons of metals and excitons of quantum emit.e.s results in t.e.formation of new plasmon-exciton hybridized energy *** plasmon-exciton strong coupling,plasmonic nanocavit.e. play a significant role due to t.e.r ability to confine light in an ultrasmall ***,two-dimensional transition metal dichalcogenides(tMDCs) have a significant.e.citon binding energy and remain stable at ambient conditions,making t.e. an excellent alternative for investigating light-mat.e. *** a result,strong plasmon-exciton coupling has been reported by introducing a single metallic ***,single nanoparticles have lower spatial confinement of electromagnetic fields and limited tunability to match t.e.excitonic ***,we introduce t.e.concept of catenary-shaped optical fields induced by plasmonic metamaterial cavit.e. to scale t.e.st.e.gth of plasmon-exciton *** demonstrated plasmon modes of metallic metamaterial cavit.e. offer high confinement and tunability and can match with t.e.excitons of tMDCs to exhibit a strong coupling regime by tuning eit.e. t.e.size of t.e.cavity gap or *** calculated Rabi splitting of Au-MoSe_2 and Au-WSe_2 heterostructures strongly depends on t.e.catenary-like field enhancement induced by t.e.Au cavity,resulting in room-temperature Rabi splitting ranging bet.e.n 77.86 and 320 me *** plasmonic metamaterial cavit.e. can pave t.e.way for manipulating excitons in tMDCs and operating active nanophotonic devices at ambient temperature.

关键词： catenary-shaped field enhancement strong coupling plasmon exciton Rabi splitting

Current considerations for t.e.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.e.doros e Pavlidis t.e.Second Depart.e.t 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 that are≥1 cm in *** detection and management are crucial for preventing lethal carcinoma *** polyps can often be distinguished from t.e.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 whet.e. cholecystectomy is always necessary for all *** manage-ment of gallbladder adenomas is determined according to t.e.size of t.e.tumor,t.e.growth rate of t.e.tumor,t.e.pat.e.t’s symptoms and whet.e. 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,t.e.absence of≥2 mm growth at 6 months,one year,and two years,as well as an adenoma sizedthout.e.isting risk factors indicates that no furt.e. surveillance is ***,it would be preferable to individualize t.e.management in doubtful *** interventional modalit.e. for preserving t.e.gallbladder need furt.e. evaluation,especially to determine t.e.long-term outcomes.

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