Bag Carrying Method during Level Walking Affects Perceived Exertion Ratings without Altering Energy Cost, Oxygen Consumption, and Heart Rate in Healthy Adults: A Randomized Crossover Trial

Hiroto Honda(Hiroto Honda ),Reina Maeda(Reina Maeda ),Suguru Ando(Suguru Ando ),Kenji Shinbo(Kenji Shinbo ),Wataru Nanikawa(Wataru Nanikawa ),Masaki Iwamura(Masaki Iwamura ),Yoshihiro Yamashina(Yoshih 사피엔시아 2020 Exercise Medicine Vol.4 No.-

Objectives: Little is known regarding the associations between Borg’s rating of perceived exertion (RPE), cardiopulmonary responses, and carrying bags while level walking. We investigated the changes in RPE and cardiopulmonary responses, including energy cost (EC), oxygen consumption (VdotO₂), and heart rate (HR), when walking with a bag. Methods: This randomized crossover study included 10 healthy adults (aged 21–22 years). Four days of experiments were performed at intervals of 1–2 weeks. The participants walked on a level treadmill while carrying a bag with a strap weighting 5 kg, placed diagonally on their shoulders (DS), vertically on their shoulders (VS), vertically in one hand (VH), and on their backs using both shoulders (BS) for 20 min. Walking speed was stable among all experiments, and was set to the participants’ preferred speed. Results: No significant differences between bag carrying methods regarding EC, VdotO₂, and %HRreserve (based on HR) were observed, whereas RPE respiratory (RPE-resp) and RPE leg muscle (RPE-leg) scores varied based on bag carrying method used. RPE-resp score was significantly lower for DS and BS than VH (both p < 0.0083); however, no significant difference was observed when each RPE-leg score was compared. Conclusions: We found that RPE-resp score varied, whereas no changes in EC, VdotO₂, and HR were observed in healthy adults while walking with different bag carrying methods. Additionally, of all bag carrying methods assessed, the highest RPE-resp score was observed when individuals carried a bag with one-hand at their side.

Work-related Stress, Caregiver Role, and Depressive Symptoms among Japanese Workers

Honda, Ayumi,Date, Yutaka,Abe, Yasuyo,Aoyagi, Kiyoshi,Honda, Sumihisa Occupational Safety and Health Research Institute 2014 Safety and health at work Vol.5 No.1

Background: In Japan, more than 60% of employees are reported to suffer from anxiety and stress. Consequently, Japanese society has begun to address such important issues as psychogenic disability and job-related suicide. Furthermore, given the aging of society and the surge in the number of elderly people requiring care, it is necessary to adequately and proactively support employees who care for their elderly relatives. The purpose of the present study was to investigate caregiver burden in caring for elderly relatives and work-related stress factors associated with mental health among employees. Methods: We studied 722 men and women aged 18-83 years in a cross-sectional study. The K10 questionnaire was used to examine mental health status. Results: The proportion of participants with a high K10 score was 15% (n = 106). Having little conversation with their supervisor and/or coworkers significantly increased the risk of depression [odds ratio (OR) 1.8], as did high job overload (OR 2.7) and job dissatisfaction (OR 3.8), compared with employees who frequently conversed with their supervisor and/or coworkers. Caring for elderly relatives as a prominent characteristic of an employee was a significant risk factor for depression (OR 2.1). Conclusion: The present study demonstrated that employees who were caring for elderly relatives were significantly associated with an increased risk of depression. To prevent depressive disorders, it may be important to focus on reducing the work-caregiving role conflict, as well as enhancing employees' job control and better rewarding their efforts in the workplace.

The Impact of Multiple Roles on Psychological Distress among Japanese Workers

Honda, Ayumi,Abe, Yasuyo,Date, Yutaka,Honda, Sumihisa Occupational Safety and Health Research Institute 2015 Safety and health at work Vol.6 No.2

Background: There has been considerable interest in Japanese society in the problem of work-related stress leading to depressive symptoms, and an increasing number of primary houseworkers maintain paid employment. The purpose of this study was to examine the differential impact of multiple roles associated with psychological distress among Japanese workers. Methods: We studied 722 men and women aged 18-83 years in a cross-sectional study. The K10 questionnaire was used to examine psychological distress. Results: The proportion of participants with psychological distress was higher in women (17.8%) compared with men (11.5%). Having three roles significantly decreased the risk of psychological distress [women: odds ratio (OR), 0.37-fold; men: OR, 0.41] compared with only one role. In working married women, there was significantly less psychological distress (OR, 0.27), and those with childrearing or caregiving responsibilities for elderly parents had significantly less psychological distress (OR, 0.38) than those with only an employment role. Similarly, working married men who had childrearing or caregiving responsibilities for elderly parents had significantly less psychological distress (OR, 0.41) than those who had only an employment role. Conclusion: The present study demonstrated that participants who had only an employment role had an increased risk of psychological distress. The degree of psychological distress was not determined solely by the number of roles. It is important to have balance between work and family life to reduce role conflict and/or role submersion, which in turn may reduce the risk of psychological distress.

The Impact of Multiple Roles on Psychological Distress among Japanese Workers

Ayumi Honda,Yasuyo Abe,Yutaka Date,Sumihisa Honda 한국산업안전보건공단 산업안전보건연구원 2015 Safety and health at work Vol.6 No.2

Background: There has been considerable interest in Japanese society in the problem of work-related stress leading to depressive symptoms, and an increasing number of primary houseworkers maintain paid employment. The purpose of this study was to examine the differential impact of multiple roles associated with psychological distress among Japanese workers. Methods: We studied 722 men and women aged 18e83 years in a cross-sectional study. The K10 questionnaire was used to examine psychological distress. Results: The proportion of participants with psychological distress was higher in women (17.8%) compared with men (11.5%). Having three roles significantly decreased the risk of psychological distress [women: odds ratio (OR), 0.37-fold; men: OR, 0.41] compared with only one role. In working married women, there was significantly less psychological distress (OR, 0.27), and those with childrearing or caregiving responsibilities for elderly parents had significantly less psychological distress (OR, 0.38) than those with only an employment role. Similarly, working married men who had childrearing or caregiving responsibilities for elderly parents had significantly less psychological distress (OR, 0.41) than those who had only an employment role. Conclusion: The present study demonstrated that participants who had only an employment role had an increased risk of psychological distress. The degree of psychological distress was not determined solely by the number of roles. It is important to have balance between work and family life to reduce role conflict and/or role submersion, which in turn may reduce the risk of psychological distress.

Work-related Stress, Caregiver Role, and Depressive Symptoms among Japanese Workers

Ayumi Honda,Yutaka Date,Yasuyo Abe,Kiyoshi Aoyagi,Sumihisa Honda 한국산업안전보건공단 산업안전보건연구원 2014 Safety and health at work Vol.5 No.1

BackgroundIn Japan, more than 60% of employees are reported to suffer from anxiety and stress. Consequently, Japanese society has begun to address such important issues as psychogenic disability and job-related suicide. Furthermore, given the aging of society and the surge in the number of elderly people requiring care, it is necessary to adequately and proactively support employees who care for their elderly relatives. The purpose of the present study was to investigate caregiver burden in caring for elderly relatives and work-related stress factors associated with mental health among employees. MethodsWe studied 722 men and women aged 18–83 years in a cross-sectional study. The K10 questionnaire was used to examine mental health status. ResultsThe proportion of participants with a high K10 score was 15% (n = 106). Having little conversation with their supervisor and/or coworkers significantly increased the risk of depression [odds ratio (OR) 1.8], as did high job overload (OR 2.7) and job dissatisfaction (OR 3.8), compared with employees who frequently conversed with their supervisor and/or coworkers. Caring for elderly relatives as a prominent characteristic of an employee was a significant risk factor for depression (OR 2.1). ConclusionThe present study demonstrated that employees who were caring for elderly relatives were significantly associated with an increased risk of depression. To prevent depressive disorders, it may be important to focus on reducing the work-caregiving role conflict, as well as enhancing employees' job control and better rewarding their efforts in the workplace.

Hybrid Steering Model depending on Driver’s Gazing Point to detect inattentive driving using Machine Learning

Takuya Honda,Nobutomo Matsunaga,Hiroshi Okajima 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10

The modeling of driving behaviors is important to analyze and design comfortable functions for the driving systems. The estimation method of the non-linear steering model using the eye tracking information was studied using the heuristic search algorithm. However, the model was limited to gaze and the inattentive driving was not modeled. It is considered that the steering model is consists of a hybrid steering model that switches the controllers according to the eye tracking information is classified in the effective/peripheral viewing field. In this paper, an estimation method of the hybrid system focusing on the effective visual field during driving is proposed. The hybrid model is constructed by steering model depending on the gazing distance and simple on-off controller. This estimation algorithm consists of 2-steps; clustering which classifies data by k-means method and the estimation of the parameters by Particle Swarm Optimization. The experiment with the long driving course consisting of five-curves and straight lines is demonstrated by HONDA driving simulator.

Proton-Coupled Electron-TransferReduction of DioxygenCatalyzed by a Saddle-Distorted Cobalt Phthalocyanine

Honda, Tatsuhiko,Kojima, Takahiko,Fukuzumi, Shunichi American Chemical Society 2012 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.134 No.9

<P>Proton-coupled electron-transfer reduction of dioxygen(O<SUB>2</SUB>) to afford hydrogen peroxide (H<SUB>2</SUB>O<SUB>2</SUB>) was investigatedby using ferrocene derivatives as reductants and saddle-distorted(α-octaphenylphthalocyaninato)cobalt(II) (Co<SUP>II</SUP>(Ph<SUB>8</SUB>Pc)) as a catalyst under acidic conditions.The selective two-electron reduction of O<SUB>2</SUB> by dimethylferrocene(Me<SUB>2</SUB>Fc) and decamethylferrocene (Me<SUB>10</SUB>Fc) occursto yield H<SUB>2</SUB>O<SUB>2</SUB> and the corresponding ferroceniumions (Me<SUB>2</SUB>Fc<SUP>+</SUP> and Me<SUB>10</SUB>Fc<SUP>+</SUP>, respectively). Mechanisms of the catalytic reduction of O<SUB>2</SUB> are discussed on the basis of detailed kinetics studies on the overallcatalytic reactions as well as on each redox reaction in the catalyticcycle. The active species to react with O<SUB>2</SUB> in the catalyticreaction is switched from Co<SUP>II</SUP>(Ph<SUB>8</SUB>Pc) to protonated Co<SUP>I</SUP>(Ph<SUB>8</SUB>PcH), depending on thereducing ability of ferrocene derivatives employed. The protonationof Co<SUP>II</SUP>(Ph<SUB>8</SUB>Pc) inhibits thedirect reduction of O<SUB>2</SUB>; however, the proton-coupled electrontransfer from Me<SUB>10</SUB>Fc to Co<SUP>II</SUP>(Ph<SUB>8</SUB>Pc) and the protonated [Co<SUP>II</SUP>(Ph<SUB>8</SUB>PcH)]<SUP>+</SUP> occurs to produce Co<SUP>I</SUP>(Ph<SUB>8</SUB>PcH) and [Co<SUP>I</SUP>(Ph<SUB>8</SUB>PcH<SUB>2</SUB>)]<SUP>+</SUP>, respectively,which react immediately with O<SUB>2</SUB>. The rate-determining stepis a proton-coupled electron-transfer reduction of O<SUB>2</SUB> byCo<SUP>II</SUP>(Ph<SUB>8</SUB>Pc) in the Co<SUP>II</SUP>(Ph<SUB>8</SUB>Pc)-catalyzed cycle with Me<SUB>2</SUB>Fc, whereas it is changed to the electron-transfer reduction of [Co<SUP>II</SUP>(Ph<SUB>8</SUB>PcH)]<SUP>+</SUP> by Me<SUB>10</SUB>Fc inthe Co<SUP>I</SUP>(Ph<SUB>8</SUB>PcH)-catalyzed cycle with Me<SUB>10</SUB>Fc. A single crystal of monoprotonated [Co<SUP>III</SUP>(Ph<SUB>8</SUB>Pc)]<SUP>+</SUP>, [Co<SUP>III</SUP>Cl<SUB>2</SUB>(Ph<SUB>8</SUB>PcH)], produced by the proton-coupled electron-transferreduction of O<SUB>2</SUB> by Co<SUP>II</SUP>(Ph<SUB>8</SUB>Pc) with HCl, was obtained, and the crystal structure wasdetermined in comparison with that of Co<SUP>II</SUP>(Ph<SUB>8</SUB>Pc).</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2012/jacsat.2012.134.issue-9/ja209978q/production/images/medium/ja-2011-09978q_0002.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja209978q'>ACS Electronic Supporting Info</A></P>

韓国における母語話者日本語教師への支援に関する考察 -現職教師を対象として-

Honda Miho 한국일어일문학회 2013 日語日文學硏究 Vol.85 No.1

In this research, aiming at improvement in the ability of the incumbent native teacher who teaches at Korean university, the method of supporting teacher was proposed using the form of tasks. In order to propose the supporting method, first, the questionnaire was created after the investigation to decide a question item suitable for Korean educational environment was conducted. Next, a survey was carried out among three groups, the student, the Korean teacher, and the native teacher using the questionnaire, and it clarified the requirements for a native teacher by factor analysis. Furthermore, “comprehension of Korean culture and language” was specified as a law native teacher's awareness factor out of the settled requirements, and it proposed the supporting method to encourage the incumbent teacher to develop and expand his/her ability by himself/herself. For the support, “comprehension of Korean culture and language” was extracted as the skill of in‐class and out‐of‐class, from the free description section in the questionnaire conducted by the students and Korean teachers. The scene for the task was decided based on the free description. The task is composed of ①Pre‐task which is performed before the task execution ②Task ③Post‐task which performed after task execution ④self monitoring check sheet, and enables the self‐improvement. Moreover, the investigation about the ability to attempt to consciousness was conducted based on the interview with Korean English teacher, native Japanese teacher. 本稿では、韓国の大学で教鞭をとる現役の母語話者教師の能力の向上と拡大を目指して、教師支援の方法をタスクという形式を用いて提案した。支援方法を提案するために、まず、韓国の教育環境に適した質問項目を確定するための調査を行い、質問紙を作成した。次に、その質問紙を使用し学習者、韓国人教師、母語話者教師の三つの集団を対象に調査を行い、因子分析によって母語話者教師の要件を明らかにした。さらに確定した要件の中から母語話者教師の認識が低いと判断される因子を「韓国文化理解·韓国語能力」に特定し、現職教師が能力の向上、拡大を自律的に図るために必要な支援の方法を提案した。支援は、まず、質問紙作成の際に行った調査において収集した学習者及び韓国人教師の自由記述から、授業·授業以外の場面において「韓国文化理解·韓国語能力」を望む記述を抽出した。これらの記述から示唆を得てタスクに使用する場面を決定した。タスクの構成は①タスク実行前に行うプレタスク②タスク③タスク実行後に行うポストタスク④内省シートとし、自律的な自己研磨の実行を可能とするものとした。さらに、韓国人日本語教師、母語話者日本語教師へのインタビューにより考案したタスクで意識化を試みた能力の検証を行った。

韓国の4年制大学における母語話者 日本語教師の役割の研究-学習者を対象として-

Honda Miho 한국일어일문학회 2011 日語日文學硏究 Vol.78 No.1

日本との交流が活発化し、相互への関心が高まってきた今日、質の高い教育を実施できる母語話者日本語教師(以下母語話者教師を呼ぶ)が求められている。本研究は、韓国における質の高い教師とはどのような教師であるのかを知るために、韓国の大学、特に4年制大学に注目し、学習者、韓国人教師、さらに母語話者教師自身にも調査を行い、包括的なデータによって韓国の4年制大学が求める母語話者教師の役割及び能力を明らかにする。さらに三者の調査結果の比較を通して、今後重点的に養成すべき教師の能力を発見することを最終目標としている。本稿では、まず、韓国の教育環境に適合した質問紙の作成のために学習者と韓国人教師を対象に質的調査を行った。その結果、学習者側においては、母語話者教師の必要性、受講したい科目、韓国語能力の必要性、希望する教師の専攻が明らかとなった。韓国人教師側においては、採用に関する事項では、母語話者教師の採用理由、採用方法、採用基準、職位、赴任期間が、役割に関する事項では、担当科目、教育環境、今後担当させたい科目が明らかとなった。また期待する役割が、授業だけではなく、授業以外に及ぶことや、教師の評価がほとんどの大学で実施されていること、またその評価方法がわかった。しかし、学習者と韓国人教師に対する質的調査を通して共通していた点は、両者とも母語話者教師を求めているが、具体的な役割や能力に関しては回答が多岐に渡っていたという点である。これらをより明確にするために、質問紙を作成し、まず学習者が求める母語話者日本語教師像についての調査を行い、調査結果は因子分析を使用して行った。その結果、学習者の求める母語話者教師の役割及び能力として「人間性」「日本語教師としての専門性」「教師としての付加的役割と能力」「学生への配慮及び授業以外の役割」「韓国文化への理解」の5因子が抽出された。a 日本との交流が活発化し、相互への関心が高まってきた今日、質の高い教育を実施できる母語話者日本語教師(以下母語話者教師を呼ぶ)が求められている。本研究は、韓国における質の高い教師とはどのような教師であるのかを知るために、韓国の大学、特に4年制大学に注目し、学習者、韓国人教師、さらに母語話者教師自身にも調査を行い、包括的なデータによって韓国の4年制大学が求める母語話者教師の役割及び能力を明らかにする。さらに三者の調査結果の比較を通して、今後重点的に養成すべき教師の能力を発見することを最終目標としている。本稿では、まず、韓国の教育環境に適合した質問紙の作成のために学習者と韓国人教師を対象に質的調査を行った。その結果、学習者側においては、母語話者教師の必要性、受講したい科目、韓国語能力の必要性、希望する教師の専攻が明らかとなった。韓国人教師側においては、採用に関する事項では、母語話者教師の採用理由、採用方法、採用基準、職位、赴任期間が、役割に関する事項では、担当科目、教育環境、今後担当させたい科目が明らかとなった。また期待する役割が、授業だけではなく、授業以外に及ぶことや、教師の評価がほとんどの大学で実施されていること、またその評価方法がわかった。しかし、学習者と韓国人教師に対する質的調査を通して共通していた点は、両者とも母語話者教師を求めているが、具体的な役割や能力に関しては回答が多岐に渡っていたという点である。これらをより明確にするために、質問紙を作成し、まず学習者が求める母語話者日本語教師像についての調査を行い、調査結果は因子分析を使用して行った。その結果、学習者の求める母語話者教師の役割及び能力として「人間性」「日本語教師としての専門性」「教師としての付加的役割と能力」「学生への配慮及び授業以外の役割」「韓国文化への理解」の5因子が抽出された。

Control of electron-transfer reduction by protonation of zinc octabutoxyphthalocyanine assisted by intramolecular hydrogen bonding

Honda, Tatsuhiko,Kojima, Takahiko,Fukuzumi, Shunichi Royal Society of Chemistry 2011 Chemical communications Vol.47 No.28

<P>Facile protonation of α-octabutoxyphthalocyaninato zinc(<SMALL>II</SMALL>) (Zn(OBu)<SUB>8</SUB>Pc) occurs to afford up to tetra-protonated species stabilized by intramolecular hydrogen bonding, resulting in positive shifts of the reduction potentials of Zn(OBu)<SUB>8</SUB>PcH<SUB><I>n</I></SUB><SUP><I>n</I>+</SUP> (<I>n</I> = 1–4) with increasing the number of protons attached to facilitate electron-transfer reduction.</P> <P>Graphic Abstract</P><P>We demonstrate that the facile protonation of α-octabutoxyphthalocyaninato zinc<SMALL>II</SMALL> stabilized by intramolecular hydrogen bonding results in positive shifts of the reduction potentials to facilitate the electron-transfer reduction. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1cc12710a'> </P>