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Dynamic robust optimal reorder point with uncertain lead time and changeable demand distribution

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第12期11卷 938-945页

作者： Masaki TAMURA Kazuko MORIZAWA Hiroyuki nagasawa Department of Electrical and Information Systems Engineering Graduate School of EngineeringOsaka Prefecture University Osaka Prefectural College of Technology

In fixed order quantity systems,uncertainty in lead time is expressed as a set of scenarios with occurrence probabilities,and the mean and variance in demand distribution are supposed to be changeable according to a known pattern.A new concept of "dynamic robust optimal reorder point" is proposed in this paper and its value is calculated as a "robust optimal reorder point function with respect to reorder time".Two approaches were employed in determining the dynamic optimal reorder *** first is a shortage rate satisfaction approach and the second is a backorder cost minimization *** former aims at finding the minimum value of reorder point at each reorder time which satisfies the condition that the cumulative distribution function (CDF) of shortage rate under a given set of scenarios in lead time is greater than or equal to a basic CDF of shortage rate predetermined by a *** the latter approach,the CDF of closeness of reorder point is defined at each reorder time to express how close to the optimal reorder points under the set of scenarios,and the dynamic optimal reorder point is defined according to stochastic *** numerical examples demonstrate the features of these dynamic robust optimal reorder points.

关键词： Reorder point Lead time Robust optimum Uncertainty Scenario

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Applying machine learning to market analysis:Knowing your luxury consumer

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Journal of Management Analytics 2019年第4期6卷 404-419页

作者： Kuo Chi-Hsien Shinya nagasawa Department of Commerce Waseda UniversityShinjuku-kuJapan

Chinese consumer research in the luxury sector is the emphasis in the business research ***,it can be cost-intensive or time-consuming to interpret big data from any research conducted in the *** this paper,the researchers created a machine-learning model to help minimize those research *** study analyzed Chinese luxury consumption behavior,while the Chinese contributed 33%of the global luxury market in 2018 and play as a growth engine in the luxury market(Bain&***://***/insights/whats-powering-chinas-market-for-luxury-goods/).The researchers interpreted this analysis using machine-learning algorithms through different sets of conditions and then proposed an understandable and highly accurate machine-learning *** traditional statistical methods,which rely on domain experts to create handcrafted features,this paper proposes an unsupervised end-to-end model that can directly and accurately process questionnaire data without human *** paper also demonstrates how to practically apply an automatic unsupervised analysis method(PCA)to find inferences in the big data,and helps interpret the implied meaning to the questions.

关键词： Luxury consumer machine learning end-to-end model unsupervised learning principal component analysis(PCA)

Biomarkers of graft-vs-host disease:Understanding and applications for the future

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World Journal of Transplantation 2021年第8期11卷 335-343页

作者： Masayuki nagasawa Department of Pediatrics Musashino Red Cross HospitalMusashino City 180-8610TokyoJapan

Hematopoietic stem cell transplantation(HSCT)is widely performed as a treatment for malignant blood disorders,such as *** achieve good clinical outcomes in HSCT,it is necessary to minimize the unfavorable effects of acute graft-vs-host disease(GVHD)and induce the more tolerable,chronic form of the *** better management of GVHD,sensitive and specific biomarkers that predict the severity and prognosis of the disease have been intensively investigated using proteomics,transcriptomics,genomics,cytomics,and tandem mass spectrometry ***,I will briefly review the current understanding of GVHD biomarkers and future prospects.

关键词： Graft-vs-host disease Hematopoietic stem cell transplantation Biomarker Cytokine Graft-vs-host reaction Organ damage

Pathophysiology of acute graft-versus-host disease from the perspective of hemodynamics determined by dielectric analysis

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World Journal of Transplantation 2023年第6期13卷 379-390页

作者： Masayuki nagasawa Department of Pediatrics Musashino Red Cross HospitalMusashino City 180-8610TokyoJapan Department of Pediatrics and Developmental Biology Tokyo Medical and Dental UniversityTokyo 113-8519TokyoJapan

BACKGROUND Numerous reports have demonstrated that the pathophysiology of graft-versushost disease(GVHD)during hematopoietic stem cell transplantation(HSCT)is closely related to vascular endothelial disorders and coagulation *** previously presented the discovery of a principle and the development of a novel instrument for measuring whole blood *** was achieved by assessing the variations in the dielectric properties of whole *** To investigate how GVHD affects the changes of dielectric properties of whole blood in patients with *** We examined the changes of dielectric properties of whole blood and erythrocyte proteins by sodium dodecyl sulfate-polyacrylamide gel electrophoresis sequentially in patients with HSCT and compared it with clinical symptoms and inflammatory parameters of *** During severe GVHD,the dielectric relaxation strength markedly increased and expression of band3 *** dielectric relaxation strength normalized with the improvement of *** vitro analysis confirmed that the increase of relaxation strength was associated with severe erythrocyte aggregates,but not with decreased expression of *** Severe erythrocyte aggregates observed in GVHD may cause coagulation abnormalities and circulatory failure,which,together with the irreversible erythrocyte dysfunction we recently reported,could lead to organ failure.

关键词： Graft-versus-host disease Dielectric relaxation Erythrocyte Stem cell transplantation Coagulation

Predictive factors for efficacy of testosterone replacement therapy for late-onset hypogonadism in Japanese men:a preliminary report

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Asian Journal of Andrology 2023年第5期25卷 587-590页

作者： Nobuyuki Kondoh Yohei Kaizuka Seiji nagasawa Yoshikazu Togo Shingo Yamamoto Department of Urology Kawanishi City Medical CenterKawanishiHyogo 6660017Japan Department of Urology Hyogo Medical UniversityNishinomiyaHyog 6638501Japan

Although testosterone replacement therapy(TRT)is the first-choice method used worldwide for late-onset hypogonadism(LOH),clinical benefits are not seen in all *** study was conducted to determine the predictors of TRT efficacy for ***-six patients who visited our Men’s Health Clinic(Kawanishi City Medical Center,Kawanishi and Hyogo Medical University,Nishinomiya,Hyogo,Japan)between November 2003 and June 2021 with data available before and after TRT were *** were divided into responders(Group 1;n=45,accounting for 80.4%)and nonresponders(Group 2;n=11,accounting for 19.6%)based on the clinical response to TRT,including patient *** noted before TRT included age,body mass index,aging males’symptoms score,sexual health inventory for men,luteinizing hormone,follicular-stimulating hormone,testosterone,free testosterone,prolactin(PRL),estradiol(E2),and testosterone/estradiol(T/E2)ratio in *** statistical analysis,a multivariable logistic regression model was *** analysis revealed PRL(odds ratio TORI:0.9624;95%confidence interval[Cl]:0.9316-0.9943,P<0.05),E2(OR:0.8692;95%Cl:0.7745-0.9754,P<0.05),and T/E2 ratio(OR:1.1312;95%Cl:1.0106-1.2661,P<0.05)to be predictive *** analyses showed that T/E2 ratio was an independent predictive factor(OR:1.1593;95%Cl:1.0438-1.2875,P<0.01).The present results suggest that a low value for T/E2 ratio may predict a reduced response to *** T/E2 ratio threshold to predict nonresponders based on receiver-operating characteristics(ROC)curve analysis was shown to be *** additional studies with larger number of patients are necessary,we propose the determination of serum E2 level and testosterone level prior to performing TRT.

关键词： estradiol late-onset hypogonadism predictive factor testosterone treatment

Preparation and adsorption behavior for metal ions and humic acid of chitosan derivatives crosslinked by irradiation

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Nuclear Science and Techniques 2007年第1期18卷 42-49页

作者： ZHAO Long Jaroslaw M. WASIKIEWICZ Hiroshi MITOMO Naotsugu nagasawa Fumio YOSHII Department of Biological and Chemical Engineering Gunma University Tenjin-cho Kiryu Gunma 376-8515 Japan Advanced Materials Research Center R ＆D Laboratories Nissin Electric Co.Ltd Umezutakase-cho Ukyo-ku Kyoto 615-8686 Japan Takasaki Radiation Chemistry Research Establishment Japan Atomic Energy Research Institute Watanuki-machi Takasaki Gunma370-1292 Japan

Th/s article deals with the determination of the adsorption properties of metal ions and humic acid in wa- ter on crosslinked chitosan derivatives (carboxymethylchitosan) which were formed using the irradiation technique without any *** solubility test of these crosslinked materials were investigated in acidic,alkaline media, distilled water,and certain organic *** electron microscopic (SEM) images showed that the crosslinked chitosan derivatives possessed a porous morphological *** characteristic analyses demon- strated typically pH-dependent properties of the crosslinked *** adsorption studies were carried out by the batch method at room *** of heavy metal ions (such as Cu^(2+),Cd^(2+)) and humic acid onto crosslinked samples was found to be strongly *** kinetic studies indicated the rapid removal of metal ions,and humic acid from the aqueous ***,isothermal adsorption data revealed that Cu^(2+),Cd^(2+), and humic acid were removed by these crosslinked materials with high *** isothermal data were interpreted well by the Langmuir *** crosslinked carboxymethylated chitosan derivatives indicate favor- able adsorption of metal ions and humic acid.

关键词：金属离子腐殖酸壳聚糖衍生物辐射处理交联

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Review of encapsulation materials for AlGaN-based deep-ultraviolet light-emitting diodes

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Photonics Research 2019年第8期7卷 812-822页

作者： YOSUKE nagasawa AKIRA HIRANO UV Craftory Co. Ltd.

This paper reviews and introduces the techniques for boosting the light-extraction efficiency(LEE) of AlGaNbased deep-ultraviolet(DUV: λ < 300 nm) light-emitting diodes(LEDs) on the basis of the discussion of their molecular structures and optical characteristics, focusing on organoencapsulation materials. Comparisons of various fluororesins, silicone resin, and nonorgano materials are described. The only usable organomaterial for encapsulating DUV-LEDs is currently considered to be polymerized perfluoro(4-vinyloxy-1-butene)(p-BVE)terminated with a —CF3 end group. By forming hemispherical lenses on DUV-LED dies using p-BVE having a —CF3 end group with a refractive index of about 1.35, the LEE was improved by 1.5-fold, demonstrating a cost-feasible packaging technique.

关键词： CF PDD AlGaN AlGaN-based deep-ultraviolet light-emitting diodes

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Food Preference of Pecky Rice Bugs Is Influenced by Experience

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Advances in Entomology 2016年第2期4卷 104-113页

作者： Atsuhiko nagasawa Laboratory of Insect Science and Bioregulation Graduate School of Agricultural Science Tohoku University Sendai Japan

This study investigated whether prior experience influences the plant food preference of Trigonotylus caelestialium and Stenotus rubrovittatus which cause pecky rice grain, by using rice plants and 2 poaceous weeds. In a choice experiment between Digitaria ciliaris and the rice plants, both T. caelestialium and S. rubrovittatus adults that were reared on D. ciliaris plants showed significant initial preference for D. ciliaris over rice. In a choice experiment between Echinochloa crus-galli var. aristata and rice plants, T. caelestialium adults reared on E. crus-galli var. aristata strongly preferred E. crus-galli var. aristata over rice throughout the experiment. However, at and after 24 h, T. caelestialium adults reared on rice showed no food preference, although T. caelestialium initially preferred E. crus-galli var. aristata. In contrast, S. rubrovittatus adults reared on rice showed no preference between E. crus-galli var. aristata and rice. However, S. rubrovittatus reared on E. crus-galli var. aristata initially preferred E. crus-galli var. aristata to rice, with this preference waning with time. The same results were obtained for both sexes. Although the effect of experience differed with food source and the species of mirid bug, prior experience initially had a noticeable effect, which disappeared with time (1 d).

关键词： Trigonotylus caelestialium Stenotus rubrovittatus Digitaria ciliaris Echinochloa crus-galli var. aristata Grass Weeds

Mutual synchronization of eyeblinks between dogs/cats and humans

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Current Zoology 2022年第2期68卷 229-232页

作者： Hikari KOYASU Risa GOTO Saho TAKAGI Miho nagasawa Tamami NAKANO Takefumi KIKUSUI Laboratory of Human-Animal Interaction and Reciprocity Azabu University1-17-71 FuchinobeChuo-kuSagamihara-shiKanagawa252-5201Japan Japan Society for the Promotion of Science 5-3-1 KojimachiChiyoda-kuTokyo102-0083Japan Graduate School of Frontiers and Biosciences Osaka University1-3 YamadaokaSuitaOsaka565-0871Japan

In humans Homo sapiens,eyeblinks play an important role in *** are synchronized between 2 individuals during conversation,with shared breaks between contexts,suggesting that blink synchronization can facilitate the sh... 详细信息

关键词： blink cat communication dog synchronization