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Japanese Sign Language Recognition by Combining Joint Skeleton-Based Handcrafted and Pixel-Based Deep Learning Features with Machine Learning Classification

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Computer Modeling in Engineering & Sciences 2024年第6期139卷 2605-2625页

作者： Jungpil Shin Md.Al Mehedi Hasan Abu Saleh Musa Miah Kota Suzuki koki Hirooka School of Computer Science and Engineering The University of AizuAizuwakamatsu965-8580Japan Department of Computer Science&Engineering Rajshahi University of Engineering&TechnologyRajshahi6204Bangladesh

Sign language recognition is vital for enhancing communication accessibility among the Deaf and hard-of-hearing communities.In Japan,approximately 360,000 individualswith hearing and speech disabilities rely on Japanese Sign Language(JSL)for communication.However,existing JSL recognition systems have faced significant performance limitations due to inherent complexities.In response to these challenges,we present a novel JSL recognition system that employs a strategic fusion approach,combining joint skeleton-based handcrafted features and pixel-based deep learning features.Our system incorporates two distinct streams:the first stream extracts crucial handcrafted features,emphasizing the capture of hand and body movements within JSL gestures.Simultaneously,a deep learning-based transfer learning stream captures hierarchical representations of JSL gestures in the second stream.Then,we concatenated the critical information of the first stream and the hierarchy of the second stream features to produce the multiple levels of the fusion features,aiming to create a comprehensive representation of the JSL gestures.After reducing the dimensionality of the feature,a feature selection approach and a kernel-based support vector machine(SVM)were used for the classification.To assess the effectiveness of our approach,we conducted extensive experiments on our Lab JSL dataset and a publicly available Arabic sign language(ArSL)dataset.Our results unequivocally demonstrate that our fusion approach significantly enhances JSL recognition accuracy and robustness compared to individual feature sets or traditional recognition methods.

关键词： Japanese Sign Language(JSL) hand gesture recognition geometric feature distance feature angle feature GoogleNet

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Evaluation of Procedural Pain in Neonates in Cameroon

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Open Journal of Pediatrics 2024年第3期14卷 568-578页

作者： Claude-Audrey Meguieze Rose Bidias Etouckey Georges Eric Nseme koki Ndombo Paul Olivier Pediatrics Department Faculty of Medicine and Biomedical Sciences University of Yaounde I Yaounde Cameroon Morphologic Sciences Department Faculty of Medicine and Biomedical Sciences University of Yaounde I Yaounde Cameroon

Introduction: Acute pain associated with caregiving is a major cause of pain among neonates. Left untreated, it can lead to long-term neurosensory and psychoaffective consequences. In Cameroon, this subject has been scarcely explored, thus constituting an impediment to the management of care-induced pain. Objective: Assess procedural pain in neonates in Yaoundé. Material and Methods: We conducted a cross sectional study with prospective data collection over a period of eight months (October 2022 to May 2023) in three hospitals. We included neonates who were being cared for and were not crying prior to the onset of healthcare, whose parents consented to the study. Assessments were done using the DAN scale, which is specific to care-induced pain. Data was entered and analyzed using SPSS 23.0 software. Results: A total of 161 newborns were included. The hospital prevalence of care-induced pain in neonates was 85%. Neonatal sepsis was the main cause for admission (96.6%). The most common procedures were venous blood sampling (94.4%) and insertion of peripheral venous lines (93.8%). The pain intensity for these procedures was severe (83.9%). The most painful procedure was lumbar tap, followed by venous access procedures. Conclusion: Neonates in hospitals are subjected to many painful procedures. The pain experienced during these procedures is severe. The most nociceptive procedure is a lumbar puncture.

关键词： Assessment Procedural Pain Neonate Yaoundé Cameroon

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Actors of Psychoactive Drug Initiation among Adolescents in Yaoundé-Cameroon

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Open Journal of Pediatrics 2024年第2期14卷 246-254页

作者： Claude-Audrey Meguieze Atabe Ngwene Neri Ngole Georges Eric Nseme Etouckey Paul Olivier koki Ndombo Department of Pediatrics Faculty of Medicine and Biomedical Sciences University of Yaoundé I Yaoundé Cameroon Department of Morphologic Sciences Faculty of Medicine and Biomedical Sciences University of Yaoundé I Yaoundé Cameroon

Introduction: Actors of psychoactive drug initiation refer to those who introduce others to psychoactive drug use (initiators) and those who are introduced to psychoactive drugs (users). By identifying their features, better prevention and intervention programs can be developed to reduce psychoactive drug use among adolescents. This article describes the role of actors of psychoactive drug initiation among teenagers in secondary schools in Yaoundé (Cameroon). Methodology: A cross sectional study was carried out in twelve secondary schools in Yaoundé from October 2022 to May 2023. Adolescents from Form four to upper sixth, who assented to participate in the study and received parental consent were included. Data were collected in a structured self-reported questionnaire and analyzed using SPSS 23. Quantitative variables were expressed using means, standard deviations, median and interquartile ranges depending on the distribution of data. Qualitative variables were expressed in the form of frequency and percentages. Results: Drug use was more prevalent among male adolescents (55.3%) from nuclear families (91.4%) who received relatively high pocket money. The main sources of drug exposure were non-family members (49.7%), especially friends outside school. The most frequent place of initiation was snack bars (33.1%). Conclusion: The study revealed the importance of the family, friends and leisure places in the initiation process of drug use in teenagers. Based on these results, parents and school authorities should work together to create a safe and supportive environment that fosters communication, education to prevent drug abuse among adolescents in Yaoundé.

关键词： Initiators Drug Users Adolescents Cameroon

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The Distribution of the Oceanic Sea Skaters, <i>Halobates</i>inside and outside the <i>Kuroshio</i>

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Open Journal of Marine Science 2017年第3期7卷 433-444页

作者： Tetsuo Harada Yuki Osumi Takero Sekimoto koki iyota Takashi Shiraki Shiho Takenaka Hitomi Takeuchi Mitsuru Nakajo Toshiki Tamura Laboratory of Environmental Physiology Graduate School of Integrated Arts and Sciences of Human and Nature Kochi University Kochi Japan Laboratory of Science Education Graduate School of Integrated Arts and Sciences of Human and Nature Kochi University Kochi Japan

The purpose of this study was to clarify the distribution of oceanic Halobates in the area of the Kuroshio flowing near the southern shore in the direction of 100° - 120°, and also to compare the population density of Halobates between the area within or outside the area of the Kuroshio and also among seasons. This study was carried out during 8 cruises by R/V TANSEIMARU. The Kuroshio area south of the southern Japan coast (30°00'N - 35°00'N, 130°25'E - 141°04'E) was dominated by H. sericeus, and the averaged population-density of this species was significantly higher inside the Kuroshio than outside this current. On the Kuroshio, H. sericeus was dominant with the population density of 16,396.4 km-2 ± 66,138.4 [26] (Mean ± SD [n]), whereas the density of H. germanus was 8,581.9 km-2 ± 24,443.2 [26]. The two oceanic sea skaters, H. sericeusand H. germanus showed significant seasonal variation in the population density, with significantly higher density in October than other months, whereas there was no such significant October peak in the cosmopolitan oceanic sea skater, H. micans. The results of this study may suggest that H. sericeus could use the Kuroshio as a transportation tool to distribute a wide latitude area of from 10°N to 40°N in the western tropical, subtropical and temperate area in the Pacific Ocean.

关键词： Halobates Oceanic Sea Skaters Population Density Season The Kuroshio

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Diagnosis of CAH in a Sub Saharan Country: Visible Part of Iceberg

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Open Journal of Pediatrics 2024年第2期14卷 227-233页

作者： Suzanne Sap Ritha Mbono Hélène Kamo Jocelyn Tony Charlotte Eposse Jeannette Epée Isabelle Mekone Adele Bodieu Gaelle Ntsoli Paul Olivier koki Mother and Child Center of the Chantal Biya Foundation University of Yaoundé I Yaoundé Cameroon Laquintinie Hospital University of Douala Douala Cameroon Genral Hospital of Garoua University of Garoua Garoua Cameroon Human Reproductive Center and Research on Fertility of Yaoundé University of Yaoundé I Yaoundé Cameroon Yaounde General Hospital University of Yaoundé I Yaoundé Cameroon Yaounde Central Hospital Yaoundé Cameroon Laquintiinie Hospital Douala Cameroon

Introduction :Congenital adrenal hyperplasia (CAH) is the most common cause of primary adrenal insufficiency. It is a rare monogenic recessive disorder. In African setting in absence of neonatal screening, the diagnosis is still late, based on a clinical approach. During this clinical enquiry, information from past history or pedigree of the patient is of a huge importance and may revealed surprises. Patients and Methods: In this observational study, we retrospectively included all patients with a diagnosis of CAH. The diagnosis of CAH was retained based on a high 17 hydroxyprogesterone level in addition to clinical and morphological findings. From patients’ files, we extracted data on family history of disease, pedigree, clinical findings and genetics when available of 39 patients from two endocrinopeadiatric centers. Results: In 13 (30%) families, we found 20 reported deaths of infant less than 12 months. In these 13 families, half of the patients followed had 21 hydroxylase deficiencies and had 11 hydroxylase deficiencies. Unsurprisingly, we suspected adrenal insufficiency in these patients at verbal autopsy even in families with a patient with 11 hydroxylase deficiency. Other non DSD malformations or genetic disorders with apparently no link with CAH were reported in 3 families. The father of a patient reported to have hypospadias. Conclusion: Each diagnosis of CAH made in our context is visible part of an iceberg. Behind a diagnosis of CAH made in our setting, is a long course of care, a dramatic past history revealing access to appropriate care disparity. Neonatal screening should thus be considered as an emergency.

关键词： Congenital Adrenal Hyperplasia

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Protective role of electrophile-reactive glutathione for DNA damage repair inhibitory effect of dibromoacetonitrile

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Journal of Environmental Sciences 2022年第7期34卷 305-314页

作者： Yukako Komaki koki Suganuma Yuko Ibuki Graduate Division of Nutritional and Environmental Sciences University of ShizuokaShizuoka 422-8526Japan

Dibromoacetonitrile(DBAN) is a disinfection byproduct(DBP) and linked with cancer in rodents, but the mechanism of its carcinogenicity has not been fully elucidated. We recently reported that DBAN induced inhibition of nucleotide excision repair(NER). In this study, we investigated if glutathione(GSH) is involved in the DBAN-induced inhibition of NER. Human keratinocytes Ha Ca T were pretreated with L-buthionine-(S,R)-sulfoximine(BSO) to deplete intracellular GSH. BSO treatment markedly potentiated the DBAN-induced NER inhibition as well as intracellular oxidation. The recruitment of NER proteins(transcription factor IIH, and xeroderma pigmentosum complementation group G) to DNA damage sites was inhibited by DBAN, which was further exacerbated by BSO treatment. Our results suggest that intracellular GSH protects cells from DBAN-induced genotoxicity including inhibition of DNA damage repair.

关键词： Disinfection byproducts Haloacetonitriles Pyrimidine dimers Glutathione DNA damage repair

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Acceptance and Experience of HIV-Infected Adolescents in Two Hospitals in Yaoundé

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Open Journal of Pediatrics 2024年第2期14卷 435-443页

作者： Isabelle Mekone Nkwele Nelly Kamgaing Pierrette Amanda Emah Manga Jeannette Épée Ngoué Hélène Kamo Sélangai Claude Audrey Meguieze Nsoh Ndeh-Fofang Serge Tchoukoua Jean-Baptiste Fotso Djemo Paul koki Ndombo Department of Pediatrics Faculty of Medicine and Biomedical Sciences University of Yaoundé I Yaoundé Cameroon Institut Supérieur des Sciences de la Santé de Bangangté Université des Montagnes Bangangté Cameroon Faculty of Medicine and Biomedical Sciences University of Garoua Garoua Cameroon

Introduction: Access to antiretroviral drugs has improved the survival of children infected with the Human Immunodeficiency Virus (HIV). As they reach adolescence, they are confronted with various constraints related to the infection and its treatment, in addition to those of the growth period they are going through. The main aim of the study was to assess the acceptance and describe the experience of HIV infection by infected adolescents but also to investigate the factors associated with good acceptance and a positive experience. Methodology: The cross-sectional analytic study concerned HIV-infected adolescents aged 15 to 19 followed up at the Chantal Biya Foundation-Mother and Child Centre (CME-FCB) and the Yaoundé University Hospital Centre (CHUY) between February 2020 and June 2020. The study saw participants complete a questionnaire containing socio-demographic data and assessing acceptance and experience with the infection. Data analysis was accomplished using Epi info software version 7.***.2.6. Results: One hundred and thirteen HIV-infected adolescents were included in the study. The sex ratio was 0.68 and the mean age was 17 years. More than half of the adolescents had a good acceptance and positive experience with the infection. Related factors were the adolescent’s perception of good health and participation in an association with other infected adolescents. Conclusion: Emphasizing the psychological and educational follow-up of infected adolescents and encouraging their participation in associations for adolescents living with HIV could reduce the consequences of poor acceptance and ensure a better transition to adulthood. .

关键词： HIV Adolescent Acceptance Experience

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Flexible Förster resonance energy transfer-assisted optical waveguide based on elastic mixed molecular crystals

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Aggregate 2023年第6期4卷 95-100页

作者： Takumi Matsuo koki Ikeda Shotaro Hayashi School of Engineering Science Kochi University of TechnologyKochiJapan

Flexible molecular crystal waveguides based on elastic molecular crystals(EMCs)are essential inﬂexible and compact optical materials.An increased loss coefﬁ-cientαdue to self-absorption is often a problem in optical waveguides(OWGs)ofﬂuorescent chemical materials waveguiding photons in active mode.Herein,the development of anthracene-based elastic mixed molecular crystals(EMMCs)is reported for Förster Resonance Energy Transfer(FRET)-assisted OWG.To yield a FRET crystal system based on elastic molecular crystals,1%–5%accep-tor doping forﬂuorescent molecular crystals of 9,10-dibromoanthracene 1 was successful by selecting the same regioisomer having electron-withdrawing group,9,10-diformylanthracene 2,as a dopant.In addition to conversion to the mixed system,there is a difference in the elastic modulus and hardness in EMC C1 and EMMC C2@1.However,the elastic behaviour was also shown in a few percent doping of the acceptor.Theαvalue of this EMMC,composed of 1 including 1%of 2(0.0077 dB/μm),is much lower than that of EMC composed of 1(0.1258 dB/μm)because of reducing self-absorption in the FRET system.An efﬁcient andﬂexible OWG was successfully developed by selecting an appropriate acceptor molecule and its low doping rate for mixed crystal construction.This method is a practical approach in various functional andﬂexible crystal systems.

关键词： anthracene elastic mixed molecular crystals ﬂexible Förster resonance energy transfer optical waveguide

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The optimized interface engineering of VS_2 as cathodes for high performance all-solid-state lithium-ion battery

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Science China(Technological Sciences) 2022年第8期65卷 1859-1866页

作者： WANG JianBiao OKABE Jugo KOMINE Yuki NOTOHARA Hiroo URITA koki MORIGUCHI Isamu WEI MingDeng Fujian Key Laboratory of Electrochemical Energy Storage Materials Fuzhou UniversityFuzhou 350108China Graduate School of Engineering Nagasaki UniversityNagasaki 852-8521Japan Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Changzhou UniversityChangzhou 213164China Institute of Materials Research and Engineering Agency for ScienceTechnology and Research(A*STAR)Innovis 138634Singapore

Vanadium sulfide was first employed as a cathode for all-solid-state lithium-ion batteries and demonstrated superior compatibility with the solid electrolyte, in which the interface between the electrode and solid electrolyte has been optimized. Consequently, it can exhibit excellent electrochemical performance in the voltage range of 1.5–3.5 V. Moreover, the ex-situ X-ray photoelectron spectroscopy measurements reveal the incomplete conversion mechanism to account for the superior electrochemical performance. Specifically, the electrode of VS_(2) exhibits a large capacity of 268.1 mA h g^(-1) at 50 mA g^(-1)(rate performance). At a current density of 100 mA g^(-1), a large reversible capacity of 215 mA h g^(-1) can be maintained after 100 cycles,indicating extraordinary cycling stability, making it a promising electrode for high energy density all-solid-state lithium-ion batteries.

关键词： VS_2 cathode interface all-solid-state battery electrochemical properties

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Funabot-Suit:A bio-inspired and McKibben muscle-actuated suit for natural kinesthetic perception

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Biomimetic Intelligence & Robotics 2023年第4期3卷 29-39页

作者： Yanhong Peng Yusuke Sakai koki Nakagawa Yuki Funabora Tadayoshi Aoyama Kenta Yokoe Shinji Doki Department of Information and Communication Engineering Graduate School of EngineeringNagoya UniversityNagoya 4648601Japan Department of Micro-Nano Mechanical Science and Engineering Graduate School of EngineeringNagoya UniversityNagoya 4648601Japan

In recent years,there has been extensive utilization of actuators driven by artificial muscles in wearable devices.However,the muscle distribution configurations of most wearable devices have been specifically designed and are difficult to generalize.Consequently,wearable devices that allow direct installation of actuators onto existing clothing are better suited for a wider range of application scenarios.This letter presents the development and evaluation of Funabot-Suit,a human muscle configuration inspired wearable assist device that employs McKibben artificial muscles to induce natural kinesthetic perception in the wearer’s torso.By integrating thin McKibben muscles into an existing motion capture suit,the Funabot-Suit is capable of generating four fundamental motions:forward and backward bending,and left and right twisting.The suit’s performance was assessed through experiments involving three subjects who wore the suit while standing and seated,with the subjects reporting the direction of their kinesthetic perception.The subjects also rated the perceived ease of kinesthetic perception direction on a five-point scale.Our results demonstrate that the Funabot-Suit successfully induces kinesthetic perceptions for the wearer,with a one hundred percent detection ratio for accurate responses in the command direction across all subjects and positions.We observed variations in the sensitivity of left–right and up-down sensations,which can be attributed to the positioning of artificial muscles and individual differences.

关键词： Bio-inspired robotics Actuators Soft robotics Artificial muscles Haptic interfaces Kinesthetic perception

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