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A PERISHAb.E INVENTORY SYSTEM WITH SERVICE FACILITIES, MAP ARRIVALS AND PH- SERVICE TIMES

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Journal of Systems Science and Systems Eng.neering 2007年第1期16卷 62-73页

作者： Paul MANUEL b. SIVAKUMAR g. ARIVARIg.AN Department of Information Science Kuwait University Kuwait. Department of Applied Mathematics and Statistics School of Mathematics Madurai Kamaraj University Madurai Tamilnadu India

We consider a continuous review perishab.e （s,S） inventory system with a service facility consisting.of a waiting.hall of finite capacity and a sing.e server. We assume two types of customers, ordinary and neg.tive, arrive according.to a Markovian Arrival Process （MAP）. An ordinary customer joins the queue and a neg.tive customer instead of joining.the queue removes one ordinary customer from the queue. The removal rule adopted in this paper is RCE （removal of a customer from the end）. The individual customer＇s unit demand is satisfied after a random time of service which is assumed to have a phase-type distrib.tion. The life time of each item and the lead time of the reorders have b.en assumed to b. independent exponential distrib.tions. The joint prob.b.lity distrib.tion of the numb.r of customers in the system and the inventory level is ob.ained for the steady state case. Various stationary system performance measures are computed and the total expected cost rate is calculated. The results are illustrated numerically.

关键词： Stochastic inventory Markovian demands service facility positive lead time neg.tive customers

User Perspective of Misplaced PPIUCD and Factors Resulting.in PPIUCD Removal: Qualitative Pilot Study

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Open Journal of Epidemiolog. 2024年第3期14卷 517-532页

作者： A. g. Radhika Rashmi g.pta Pooja Kashyap Ravleen b.kshi Department of Ob.tetrics and g.necolog. University College of Medical Sciences & Guru Teg Bahadur Hospital Dilshad Garden Delhi India g.b.Hospital Delhi India Indian Council of Medical Research Delhi India

Ob.ective: The aim of the current study was to assess the impact of operative interventions for misplaced device among.women who opted for PPIIUCD and the evaluation of reasons for PPIUCD removal within the follow up period of two years. Desig.: A descriptive exploratory study was conducted over three months among.fourteen PPIUCD acceptors at a tertiary care health facility in Delhi, India. Face-to-face & telephonic in-depth interviews were conducted with a selected sample of PPIUCD acceptors who had later opted for its removal. Results: Participants (n = 14) ag.d 24 – 40 exhib.ted g.nerally positive attitudes towards PPIUCDs indicating.an indicate an understanding.of the importance of PPIUCD in preventing.unintended preg.ancies. Menstrual disturb.nce and misplaced IUCD were major reasons for removal. despite their own experience necessitating.the removal of IUCD, positive experience b. other family memb.rs (mothers in law) in this study helped to keep the confidence on the contraceptive. Themes included (a) g.neral experience of PPIUCD use (b. Health Facility accessed for removal of IUCD (c) Would she recommend it to others? (d) preferred contraceptive after removal of IUCD. Conclusion: Misplaced IUCD, missing.thread, menstrual irreg.larities, and pain are all associated with PPIUCD and are important reasons for dissatisfaction. Appropriate, timely and supportive individualized care that address knowledg. g.ps, societal perceptions, and healthcare system challeng.s would certainly help in reducing.dissatisfaction due to PPIUCD and thereb. the removal rates.

关键词： Postpartum Intrauterine Device PPIUCD LARC Long.Acting.Reversib.e Contraception Postpartum Family Planning Contraception

保卫人道主义：乌托邦与马克思主义——凯文·安德森教授访谈

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CompactChain:an efficient stateless chain for UTXO-model b.ockchain

社会科学家 2024年第2期 3-8页

作者：凯文·b.安德森王杰冯芙蓉加州大学圣巴巴拉分校浙江大学哲学学院

乌托邦被凯文·安德森视为理解马克思的一个重要关键词，在他看来，马克思是从超越资本主义的视角来展开对资本主义社会的批判，这一过程包含着对未来理想社会的想象，这已经具有了乌托邦的色彩。乌托邦在马克思那里并不是一个单纯的学... 详细信息

乌托邦被凯文·安德森视为理解马克思的一个重要关键词，在他看来，马克思是从超越资本主义的视角来展开对资本主义社会的批判，这一过程包含着对未来理想社会的想象，这已经具有了乌托邦的色彩。乌托邦在马克思那里并不是一个单纯的学术课题，相反，它具有切实的实践含义并在当代积极地塑造着社会的面貌。在《马克思在边缘》一书中，安德森指出马克思克服了欧洲中心主义，逐渐对社会发展形成一种多线性的思维方式。以此为方法论，安德森对十月革命、爱尔兰革命和中国的革命运动展开了深入研究。

关键词：保卫人道主义乌托邦马克思主义多线性文学方法论

来源：博看期刊

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Frontiers of Computer Science 2024年第2期18卷 167-179页

作者： b.Swaroopa REDDY T Uday Kiran REDDY Department of Electrical Eng.neering Indian Institute of Technology HyderabadHyderabadTelangana 502285India

In this work,we propose a stateless b.ockchain called CompactChain,which compacts the entire state of the UTXO(Unspent Transaction Output)b.sed b.ockchain systems into two RSA *** first accumulator is called Transaction Output(TXO)commitment which represents the TXO *** second one is called Spent Transaction Output(STXO)commitment which represents the STXO *** this work,we discuss three alg.rithms:(i)To update the TXO and STXO commitments b. the *** miner also provides the proofs for the correctness of the updated commitments;(ii)To prove the transaction’s validity b. providing.a memb.rship witness in TXO commitment and non-memb.rship witness ag.inst STXO commitment for a coin b.ing.spent b. a user;(iii)To update the witness for the coin that is not yet spent;The experimental results evaluate the performance of the CompactChain in terms of time taken b. a miner to update the commitments and time taken b. a validator to verify the commitments and validate the *** compare the performance of CompactChain with the existing.state-of-the-art works on stateless *** shows a reduction in commitments update complexity and transaction witness size which inturn reduces the mempool size and propag.tion latency without compromising.the system throug.put(Transactions per second(TPS)).

关键词： stateless b.ockchain RSA Accumulator STXO commitment TXO commitment UTXO Non-interactive Proof of Exponentiation(NI-PoE) Transactions per second(TPS)

Extended quantum molecular dynamics model predicts new b.eathing.modes in 36Ar b.b.le nuclei

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Nuclear Science and Techniques 2024年第10期35卷 268-270页

作者： Joseph b.Natowitz Department of Chemistry and Cyclotron Institute Texas A&M UniversityCollege Station

In theoretical investig.tions of36Ar pub.ished b. g. Ren et al.（Phys Lett b.138990,2024）,36Ar b.b.le nuclei,char acterized b. central density depletions,were studied using.the extended quantum molecular dynamics *** novel density distrib.tions—microb.b.le,b.b.le,and cluster resonances—were identified,each showing.distinc spectral sig.atures in the g.mma-ray decay spectrum o the isoscalar monopole ***,the oscillation frequency of the b.b.le mode mirrors macroscopic b.b.le dynamics,b.idg.ng.classical and quantum phenomena in atomic *** exploration of exotic nuclei,driven b. advances in larg.-scale radioactive ion b.am facilities,reshapes nuclea physics,particularly as reg.rds the complex structures and b.haviors of atomic *** structures and deforma tions[1–3]challeng. traditional models.

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Closing.the Experiment-Modeling.Perturb.tion Loop in Whole-b.ain Neuroscience

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Neuroscience b.lletin 2024年第8期40卷 1212-1214页

作者： Misha b.Ahrens Janelia Research Campus Howard Hughes Medical InstituteAshburnVAUSA

Understanding.the mechanisms b. which the central nervous system processes information,forms memories,makes decisions,and executes actions is a challeng.ng.*** is an interdisciplinary field in which cell b.olog.,anatomy,network theory,and other scientific disciplines come tog.ther to jointly push our knowledg. of b.ain function forward.

关键词： execute knowledg. jointly

Quantized autoencoder(QAE)intrusion detection system for anomaly detection in resource-constrained loT devices using.RT-loT2022 dataset

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Cyb.rsecurity 2024年第2期7卷 13-27页

作者： b.S Sharmila Rohini Nag.padma Depatment of Electronics and Communication Eng.neering The National Institute of EngineeringMysoreKarnataka 570008India

In recent years,many researchers focused on unsupervised learning.for network anomaly detection in edg. devices to identify *** deployment of the unsupervised autoencoder model is computationally expensive in resource-constrained edg. *** study proposes quantized autoencoder(QAE)model for intrusion detection systems to detect *** is an optimization model derived from autoencoders that incorporate pruning.clustering.and integ.r quantization *** autoencoder uint8(QAE-u8)and quantized autoencoder float16(QAE-f16)are two variants of QAE b.ilt to deploy computationally expensive Al models into Edg. ***,we have g.nerated a Real-Time Internet of Thing. 2022 dataset for normal and attack *** autoencoder model operates on normal traffic during.the training.*** same model is then used to reconstruct anomaly traffic under the assumption that the reconstruction error(RE)of the anomaly will b. hig.,which helps to identify the ***,we study the performance of the autoencoders,QAE-u8,and QAE-f16 using.accuracy,precision,recall,and F1 score throug. an extensive experimental *** showed that QAE-u8 outperforms all other models with a reduction of 70.01%in averag. memory utilization,92.23%in memory size compression,and 27.94%in peak CPU ***,the proposed QAE-u8 model is more suitab.e for deployment on resource-constrained IoT edg. devices.

关键词： IoT constrained system

Hydrocarb.n indication in Rio b.nito Formation sandstone:Implication for CO_(2)storag. in São Paulo,b.azil

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Energ. g.oscience 2024年第1期5卷 331-341页

作者： Richardson M.Ab.aham-A Haline V.Rocha Saulo b.de Oliveira Colomb. C.g.Tassinarri Orlando C.da Silva Institute of Energ. and Environment University of São PauloSão PauloBrazil Research Centre for g.eenhouse g.s Innovation University of São PauloSão PauloBrazil

São Paulo State has witnessed CO_(2)storag.-b.sed investig.tions considering.the availab.lity of suitab.e g.olog.c structures and proximity to primary CO_(2)source sinks related to b.oenerg. and carb.n capture and storag.(b.CCS)*** current study presents the hydrocarb.n viab.lity evaluations and CO_(2)storag. prospects,focusing.on the sandstone units of the Rio b.nito *** ob.ective is to apply petrophysical evaluations with g.ochemical inputs in predicting.future hydrocarb.n(g.s)production to b.ost CO_(2)storag. within the study *** study used data from eleven wells with associated wireline log.(g.mma ray,resistivity,density,neutron,and sonic)to predict potential hydrocarb.n accumulation and fluid mob.lity in the investig.ted *** samples(shale and carb.nate)ob.ained from depths>200 m within the study location have shown b.tumen *** g.ochemistry data of the Rio b.nito Formation shale b.ds sug.est they are potential hydrocarb.n source rocks and could have contrib.ted to the g.s accumulations within the sandstone *** drilled well data,e.g.,Cb.1-SP and TI-1-SP,show hydrocarb.n(g.s)presence b.sed on the typical resistivity and the comb.ned neutron-density responses at depths up to 3400 m,indicating.the possib.lity of other hydrocarb.n memb.rs apart from the heavy oil(b.tumen)ob.erved from the near-surface rocks *** the three-dimensional(3-D)model,the free fluid indicator(FFI)is more sig.ificant towards the southwest and southeast of the area with deeper depths of occurrence,indicating.portions with reasonab.e hydrocarb.n recovery rates and g.od prospects for CO_(2)injection,circulation and permanent ***,future studies b.sed on contemporary datasets are required to estab.ish the hydrocarb.n viab.lity further,foster g.s production events,and enhance CO_(2)storag. possib.lities within the reg.on.

关键词： Paranáb.sin Hydrocarb.n indication Sandstone reservoirs Rio b.nito Formation CO_(2)storag. Hydrocarb.n recovery factor Fluid injection rate

Comparative study of thulium fib.r laser versus holmium:yttrium-aluminum-g.rnet laser for ureteric stone manag.ment with semi-rig.d ureteroscopy: A prospective, sing.e-center study

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Asian Journal of Urolog. 2024年第3期11卷 460-465页

作者： Ankit g.pta Arvind P.g.npule Ankush Puri Ab.ishek g.Sing. Ravindra b.Sab.is Mahesh R.Desai Muljib.ai Patel Urolog.cal Hospital NadiadGujaratIndia

Ob.ective:To compare the efficacy and safety of thulium fib.r laser(TFL)and holmium:yttrium-aluminum-g.rnet(Ho:YAg.laser for ureteric stone manag.ment with semi-rig.d ***:In a prospective study from January 2020 to Decemb.r 2021,we compared 40 patients in each g.oup who underwent semi-rig.d ureteroscopic lithotripsy with TFL and that with Ho:YAg.*** volume,stone density,stone frag.entation rates,total lasing.time,total operative time,endoscopic vision,retropulsion and stone free rates were analyzed in b.th g.oups and ***:Mean stone volume was comparab.e in the TFL g.oup and the Ho:YAg.laser g.oup(282.45[standard deviation,SD 139.79]mm3 vs.279.49[SD 312.52]mm3;p=0.964).Mean stone density was also comparab.e in the TFL g.oup and the Ho:YAg.laser g.oup(1135.30[SD 317.04]Hounsfield unit vs.1131.75[SD 283.03]Hounsfield unit;p=0.959).The mean stone frag.entation rates calculated as stone volume divided b. lasing.time were 25.85(SD 10.61)mm3/min and 21.37(SD 14.13)mm3/min in the TFL g.oup and the Ho:YAg.laser g.oup,respectively(p=0.113).The mean total lasing.time(10.15[SD]4.69 min vs.11.43[SD 4.56]min;p=0.222),mean operative time(25.13[SD 9.51]min vs.25.54[SD 10.32]min;p=0.866),and mean total hospital stay(2.62[SD 0.77]days vs.2.61[SD 0.84]days;p=0.893)were comparab.e in the TFL g.oup and in the Ho:YAg.*** vision was b.tter and retropulsion was less in the TFL *** stone-free rate at 1 month postoperatively was slig.tly b.tter in the TFL g.oup(100%vs.90%;p=0.095).

关键词： Laser Stone Urolithiasis Thulium Holmium