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Maximum Likelihood Method for RFID Tag Set Cardinality Estimation using Multiple Independent Reader Sessions

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Maximum Likelihood Method for RFID Tag Set Cardinality Estim...

Liver biopsy in the post-hepatitis C virus era in Japan

2011年亚太信号与信息处理协会年会

作者： Chuyen T. NGUYEN Kazunori HAYASHI Megumi KANEKO Petar POPOVSKI hideaki sakai Department of Electronic Systems Aalborg University Aalborg Denmark

In this paper, Radio Frequency IDentification （RFID） tag set cardinality estimation problem is considered under the model of multiple independent reader sessions with unreliable radio communication links in which transmission errors might occur. After the R-th reader session, the number of tags detected in j （j = 1, 2, ..., R） reader sessions is updated, which we call observed evidence. Then, in order to maximize the likelihood function of the number of tags and the transmission error probability given the observed evidences, we propose three different estimation methods depending on how to treat the discrete nature of tag set cardinality. Computer simulation results demonstrate the effectiveness of the proposed method.

关键词： Radiocommunication Likelihood Functions base number Statistical analysis RFID tags solidification Set (Psychology) Transmission errors TAGGING maximum likelihood

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World Journal of Gastroenterology 2024年第14期30卷 1949-1957页

作者： Yoshihiro Ikura Takako Okubo Yasuhiro sakai Department of Pathology Takatsuki General HospitalTakatsuki 569-1192Osaka PrefectureJapan Department of Pathology Kansai Medical University Medical CenterMoriguchi 570-8507Japan

In Japan,liver biopsies were previously crucial in evaluating the severity of hepatitis caused by the hepatitis C virus(HCV)and diagnosing HCV-related hepatocellular carcinoma(HCC).However,due to the development of effective antiviral treatments and advanced imaging,the necessity for biopsies has significantly *** change has resulted in fewer chances for diagnosing liver disease,causing many general pathologists to feel less confident in making liver biopsy *** article provides a comprehensive overview of the challenges and potential solutions related to liver biopsies in ***,it highlights the importance of considering steatotic liver diseases as independent conditions that can coexist with other liver diseases due to their increasing ***,it emphasizes the need to avoid hasty assumptions of HCC in nodular lesions,because clinically diagnosable HCCs are not targets for ***,the importance of diagnosing hepatic immune-related adverse events caused by immune checkpoint inhibitors is increasing due to the anticipated widespread use of these *** conclusion,pathologists should be attuned to the changing landscape of liver diseases and approach liver biopsies with care and attention to detail.

关键词： Liver biopsy Alteration Post-hepatitis C virus era Steatotic liver disease Hepatic tumors Immune checkpoint inhibitors

Geomorphological evidence inconvenient for the antecedent rivers of the Arun and Tista across the Himalayan range

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Journal of Mountain Science 2024年第9期21卷 3001-3017页

作者： NAKATA Takashi KUMAHARA Yasuhiro NAIK Sambit Prasanajit sakai Harutaka Graduate School of Humanities and Social Sciences Hiroshima UniversityHigashi-Hiroshima 739-8522Japan Active Fault and Earthquake Hazard Mitigation Research Center Pukyong National UniversityBusan 48513South Korea Department of Petroleum Engineering and Earth Sciences University of Petroleum and Energy StudiesDehradun 248007India Graduate School of Science Kyoto UniversityKyoto 606-8502Japan

The Arun and Tista Rivers,which flow across the Himalayas,are commonly known as antecedent valleys that overcame the rapid uplift of the Higher Himalayan *** clarify whether the idea of antecedent rivers is acceptable,we investigated the geomorphology of the Himalayas between eastern Nepal and Bhutan *** southern part of Tibetan Plateau,extending across the Himalayas as tectonically un-deformed glaciated terrain named as'Tibetan Corridor,'does not suggest the regional uplift of the Higher *** 8,000-m class mountains of Everest,Makalu,and Kanchenjunga are isolated residual peaks on the glaciated terrain composed of mountain peaks of 4,000–6,000 m *** Tibetan glaciers commonly beheaded by Himalayan glaciers along the great watershed of the Himalayas suggest the expansion of Himalayan river drainage by *** the narrow upstream regions of the Arun and Tista Rivers with less precipitation behind the range,it is hard to collect enough water for the power of down-cutting their channels against the uplifting *** fission track ages of the Higher Himalayan Crystalline Nappe suggest that the Himalayas attained their present altitude by 11–10 Ma,and the Arun and Tista Rivers formed deep gorges across the Himalayas by headward erosion.

关键词： Himalaya Antecedent river Geomorphology AW3D30 DSM Glacier piracy

Natural history of asymptomatic gallbladder stones in clinic without beds:A long-term prognosis over 10 years

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World Journal of Clinical Cases 2024年第1期12卷 42-50页

作者： Yuji sakai Toshio Tsuyuguchi Hiroshi Ohyama Junichiro Kumagai Takashi Kaiho Masayuki Ohtsuka Naoya Kato Tadao sakai Department of Gastroenterology Sakai ClinicKimistu 299-1162Japan Department of Gastroenterology Graduate School of MedicineChiba UniversityChiba 260-8677Japan Department of Gastroenterology Chiba Prefectural Sawara HospitalChiba Prefectural Sawara HospitalSawara 287-0003Japan Department of Gastroenterology Kimitsu Central HospitalKisarazu 292-8535Japan Department of Surgery Kimitsu Central HospitalKisarazu 292-8535Japan Department of General Surgery Graduate School of MedicineChiba UniversityChiba 260-8677Japan

BACKGROUND Several studies have explored the long-term prognosis of patients with asymp-tomatic gallbladder *** reports were primarily conducted in facilities equipped with beds for addressing symptomatic *** To report the long-term prognosis of patients with asymptomatic gallbladder stones in clinics without bed *** We investigated the prognoses of 237 patients diagnosed with asymptomatic gallbladder stones in clinics without beds between March 2010 and October *** symptoms developed,patients were transferred to hospitals where appropriate treatment was *** investigated the asymptomatic and survival periods during the *** Among the 237 patients,214(90.3%)remained asymptomatic,with a mean asymptomatic period of 3898.9279±46.871 d(50-4111 d,10.7 years on average).Biliary complications developed in 23 patients(9.7%),with a mean survival period of 4010.0285±31.2788 d(53-4112 d,10.9 years on average).No patient died of biliary *** The long-term prognosis of asymptomatic gallbladder stones in clinics without beds was *** the condition became symptomatic,the patients were transferred to hospitals with beds that could address it;thus,no deaths related to biliary complications were *** finding suggests that follow-up care in clinics without beds is possible.

关键词： Gallbladder stone Acute cholangitis Acute cholecystitis Asymptomatic gallbladder stone Symptomatic gallbladder stone

Cellular response against cytosolic leakage of mitochondrial DNA: insights into the pathology of Parkinson’s disease

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Neural Regeneration Research 2022年第12期17卷 2682-2684页

作者： Akiko sakai hideaki Matsui Department of Neuroscience of Disease Brain Research InstituteNiigata UniversityNiigataJapan

Mitochondria are important organelles for cellular metabolism and homeostasis,and their abnormalities are implicated in various *** mitochondria originate from protobacterium,their components are easily recognized by pathogen sensors called pattern-recognition receptors as foreign substances in the *** is prominent for mitochondrial DNA(mtDNA)which has different properties from nuclear DNA,such as low,if any,methylation status,vulnerability to oxidation due to the proximity to the oxidative phosphorylation machinery,and its circular *** studies indicate that perturbations in mitochondrial function and homeostasis cause mtDNA to leak into the cytoplasm,where it triggers the innate immune response(West and Shadel,2017).Although inflammatory response is a cellular strategy to resist viral infections,it can also lead to undesirable outcomes by damaging own cells and tissues.

关键词： homeostasis metabolism insight

Enhancing clinical proficiency through laparoscopic training using Japanese origami

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Laparoscopic, Endoscopic and Robotic Surgery 2024年第3期7卷 102-106页

作者： Shunsuke Furukawa Masatsugu Hiraki Naoya Kimura Ryota Sakurai Ryo Kohata Naohiko Kohya Masashi sakai Akashi Ikubo Ryuichiro Samejima Department of Surgery Japanese Red Cross Society Karatsu Red Cross HospitalSaga847-8588Japan Department of Surgery Saga University Faculty of MedicineSaga849-8501Japan

Objective This study aimed to investigate the clinical efficacy of laparoscopic training using origami,a traditional Japanese papercraft,using laparoscopic forceps to create origami *** In this retrospective study,4 surgeons were randomly divided into 2 groups:The training group,consisting of surgeons 1 and 2,and the non-training group,consisting of surgeons 3 and *** the course of a one-year study period,the training group regularly underwent laparoscopic surgery training with a dry box,wherein they folded a total of 1000 origami cranes using laparoscopic *** non-training group periodically underwent common laparoscopic surgery training of techniques such as suturing and *** surgeon regularly performed the transabdominal preperitoneal approach for inguinal *** training was conducted concurrently with the *** procedure time(peritoneum detachment,mesh placement,and closure of the peritoneum),total operation time(time from peritoneum detachment to closure of the peritoneum),and surgical outcomes were *** The training group showed greater improvement in the total operation time and more stable performance than the non-training ***,the time taken for peritoneum detachment was significantly shorter in the training *** Laparoscopic training using origami has the potential to enhance laparoscopic surgical skills and improve surgical outcomes.

关键词： Laparoscopic surgery Training Dry box Origami

Flow Rate Measurement of Gravity Infusion Set and Functional Evaluation of Drop Counter: A Pilot Study

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Journal of Biomedical Science and Engineering 2024年第7期17卷 129-135页

作者： Rina sakai Shuichi Tanaka Kaya Murakami Tomomi Mizuhashi Kazuhiro Yoshida Masanobu Ujihira Department of Medical Engineering and Technology Kitasato University School of Allied Health Sciences Sagamihara Japan Faculty of Medical Engineering Gunma University of Health and Welfare Maebashi Japan Kitasato University Graduate School of Medical Sciences Sagamihara Japan

Developing a novel drop counter by introducing the Internet of Things concept has been vigorously conducted in recent years. Understanding the newly introduced drop counter’s flow rate control accuracy and flow rate count feature is essential for improving safety in infusion management. This study aimed to verify if the new drop counters could secure accurate flow rate and drip count by conducting actual flow rate measurements using gravimetry and functional evaluation. A drop counter was attached to each drip chamber of the infusion set, and an IV drip was conducted at the 100 ml/h flow rate. The weight of discharged physiological saline was measured to plot trumpet curves. Next, three different types of drop counters were evaluated to determine if they maintained drip count accuracy according to the changes in their position angles. The flow rate errors in all conditions indicated trumpet-like curves, exhibiting an overall error range within ±10% in all observation windows. Although every drop counter successfully detected and measured dripping, it was challenging in some counters to detect dripping when the drip chamber was tilted. In comparing adult and pediatric IV sets, the adult IV set was found to be less likely to detect dripping in the angled position. No significant differences in results were confirmed between high and low flow rates, suggesting that the drop count function would not be affected by the flow rate in the ranges of typical infusion practices. Doppler sensors have a wide range of measurements and high sensitivity;the dripping was detected successfully even when the drip chamber was tilted, probably due to the advantages of these sensors. In contrast, miscounts occurred in those equipped with infrared sensors, which could not detect light intensity changes in tilted positions. Understanding the tendencies in flow rate errors in infusion can be valuable information for infusion management.

关键词： Gravity Infusion Set Drop Counter IV Fluids Flow Rate Trumpet Curves

Stresses in the Scapular Fossa Do Not Exceed the Yield Stress When Elevated up to 135 Degrees of Abduction after Reverse Shoulder Arthroplasty

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Journal of Biomedical Science and Engineering 2024年第2期17卷 35-40页

作者： Rina sakai Tomonori Kenmoku Ryo Tazawa Kazuhiro Yoshida Tomomi Mizuhashi Masanobu Ujihira Department of Medical Engineering and Technology Kitasato University School of Allied Health Sciences Sagamihara Japan Department of Orthopedic Surgery Kitasato University School of Medicine Sagamihara Japan Kitasato University Graduate School of Medical Sciences Sagamihara Japan

Reverse shoulder arthroplasty (RSA) is an effective treatment for rotator cuff tears. Despite its advantages, complications occur at a high rate. Complications requiring revision include a high rate of base plate failure, 38% of which are due to instability. The primary stability the base plate ensures is a crucial factor and, thus, is the subject of much debate in clinical studies and biomechanical research. This study is aimed to provide data that will contribute to the base plate’s pri-mary stability and glenoid longevity by clarifying the stresses at the scapular fossa and base plate interface associated with elevation after RSA. A 3D finite element model was created from the DICOM data for the scapulohumeral joint and SMR shoulder system. For loading conditions, 30 N was applied for each posi-tion with abduction angles of 0, 45, 90, and 135 degrees. A three-dimensional fi-nite element analysis was performed using the static implicit method with LS-DYNA. The von Mises stresses in the scapular fossa were found not to exceed the yield stress on the bone even after elevation to an abduction angle of 135 de-grees after RSA. It is rough to uniformly compare the yield stress and the von Mises stress, but it was inferred that the possibility of fracture is low unless a large external force is applied. A maximum von Mises stress showed 0 degrees of abduction, suggesting that the lowered position is in a more severe condition than the elevated position. If better improvement is desired, it may be necessary to devise ways to reduce the stress on the upper screw. .

关键词： Reverse Shoulder Arthroplasty Finite Element Analysis Yield Stress Glenoid

Artificial oxygen carriers,from nanometer-to micrometer-sized particles,made of hemoglobin composites substituting for red blood cells

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Particuology 2022年第5期20卷 43-55页

作者： Takashi Matsuhira Hiromi sakai Department of Chemistry Nara Medical University840 Shijo-choKashihara 634-8521Japan

Blood transfusions are regarded as the most well-known and frequently performed cell *** current transfusion systems are sophisticated,they cannot be freed from the inherent difficulties that include infection,short shelf life,and blood type *** oxygen carriers produced using hemoglobin(Hb)are designated as Hb-based oxygen carriers(HBOCs),which are anticipated for use as biomaterials that have potential to resolve issues of transfusion by a radical paradigm *** HBOCs,nanometer-sized to micrometer-sized bioparticles having an oxygen-carrying function,are developed for use as substitutes for red blood cells(RBCs).This paper presents an overview of the classification of HBOCs with reference to their histories,preparations,structures,functions,and in vitro and in vivo ***,we give a more detailed introduction of our academic studies of liposome encapsulated Hb,designated as Hb-vesicles(HbV),which mimic the physiologically important corpuscular structure of *** review outlines perennial efforts and approaches to mimic RBC functions through chemical,genetic,and encapsulation *** will provide important insights into the eventual realization of an alternative for RBC transfusion.

关键词： Blood substitutes Cross-linking Hemoglobin(Hb)-based oxygen carriers(HBOCs) Liposome Supramolecular assembly Transfusion alternatives