• Title/Summary/Keyword: Physical cleaning

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Background and Facility Characteristics of Service Attached Elderly Housing in Japan (일본 서비스제공 고령자주택의 도입배경 및 시설 특성)

  • Kwon, Soonjung;Ji, Junhwan
    • Journal of The Korea Institute of Healthcare Architecture
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    • v.20 no.2
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    • pp.17-26
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    • 2014
  • Purpose: This study tries to explore and analyse Service Attached Elderly Housing of Japan in order to prepare new elderly housing type effectively for aged society of Korea. Service Attached Elderly Housing was introduced in 2011 and it includes existing elderly housing of Japan such as Designated Elderly Housing, Elderly Friendly Housing and Superior Elderly Housing. Methods: Historical transition of Japanese elderly housing and background of the introduction of Service Attached Elderly Housing have been reviewed first. Thereafter research team visited to 3 elderly housings of Japan providing elderly services such as elderly care, meal, cleaning, washing, safety check, entertainment, etc. Based on the literature survey and field trip, the characteristics of Service Attached Elderly Housing have been drew out. Results: As the characteristics of Service Attached Elderly Housing of Japan, mixed use facility, community based housing, generation mix, barrier free design, and provision of daily life service for the elderly have been identified. Implications: Not only physical consideration including Universal Design but also elderly services such as elderly care, meal, housework, safety check, entertainment and so on are necessary for the supply of elderly housing.

Effect of Occupants' Active Behaviour of Environmental Control on Indoor Environment in Summer's High School Classroom (하절기 고등학교 교실에서 재실자의 적극적 환경조절행동이 실내환경에 미치는 영향)

  • Kwak, Ro-Yeul
    • Journal of the Architectural Institute of Korea Structure & Construction
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    • v.35 no.5
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    • pp.181-190
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    • 2019
  • In high school classrooms, it is reported that ventilation is often insufficient, increasing health risks among students. Therefore, indoor air quality in school classrooms is very important in terms of students' health and learning abilities. In this study, the effect of window opening, which is a control mechanism for air control in summer high school classrooms, on the change in air and indoor environment of the classroom was analyzed and physical conditions of indoor and air environment were observed during the classroom course, and satisfaction of the students and teachers was assessed with questionnaires. It was found that change rate of $CO_2$ concentration in classroom was effectively reduced by carrying out activity of opening the window by active environment control activity of occupants at break time, intermission time and cleaning time. And optimal window opening by students was presented to prevent unpleasantness and degradation of indoor air quality and the effects were analyzed.

Construction of sports-educational places using resistant and water-repellent raw materials in concrete

  • Wenbo Xu;Zhiqiang Zhu
    • Structural Engineering and Mechanics
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    • v.86 no.1
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    • pp.109-118
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    • 2023
  • Any place where exercise is common, such as a club, sports hall, or school, is considered a place for teaching sports. When doing sports, a very safe environment for sports should be chosen. The athlete should consider the safety of sports facilities and equipment, and if there is a defect, he should refrain from exercising in these places. The safety of sports facilities is very effective in creating people's sports activities, with the benefits of staying away from physical harm, enjoying sports, and having mental peace. Everyone has the right to participate in sports and recreation and to ensure that they enjoy a safe environment. The ability to manage and solve issues that may arise plays the most critical role in creating a safe environment. The quality of construction materials used for the construction of sports facilities is of great importance. In this work, the resistance and water repellency of concrete constituents for the construction of sports buildings have been investigated by nanoscience. Nano-concrete material solves the main problem of concrete surfaces, i.e., the entry of water and humidity into the structure. It also gives it a self-cleaning ability with its water repellency. Nanoparticles are placed between pores and cover the cracks, which causes roughness in the surface structure of concrete. The high roughness of the surface of the coated concrete caused its super-hydrophobicity. In hydrophobic surfaces, the higher the contact angle, the more hydrophobic the surface will be. In order to investigate the hydrophobic properties, silica nanoparticles, silica nanoparticles, and fly ash were prepared on concrete, and their properties were analyzed.

Analyzing the relationship between Sports Commitment and Behavioral Intention of Sports Wearable Devices through UTAUT Model (UTAUT 모델을 통한 여가스포츠 참여자의 스포츠몰입과 웨어러블 디바이스 수용 간의 관계)

  • Chun, Sung Bum;Lim, Jin Sun;Lee, Chul Won
    • 한국체육학회지인문사회과학편
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    • v.55 no.5
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    • pp.291-306
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    • 2016
  • The purpose of this study was to verify the relationship between Sports commitment and Behavioral intention of wearable device among sports participants through UTAUT model. Convenience sampling was conducted and 239 questionnaires from various sports participants were analyzed after data cleaning. SPSS ver 21 and AMOS 20.0 software were used to anayze the collected data. As a result, first, the main 4 factors of UTAUT had positive effect on Behavioral intention and Use behavior but Sports commitment was not statistically related to Behavioral intention. Second, the full mediation effect of UTAUT main factors between Sports commitment and Behavioral intention were verified.

A Study on Thin-Film Silicon Solar Cells with Multi-Architecture Etching Technique to Improve Light Trapping (광 포획 향상을 위한 다중 아키텍처 식각 기술을 적용한 박막 실리콘 태양전지에 관한 연구)

  • Hyeong Gi Park;Junsin Yi
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.37 no.3
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    • pp.337-344
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    • 2024
  • This work focuses on improving the light-harvesting efficiency of thin-film silicon solar cells through innovative multi-architecture surface modifications. To create a regular optical structure, a lithographic process was performed to form it on a glass substrate through various etching processes, from Etch-1 to Etch-3. AZO was deposited on top of the structures and re-etched to create a multi-architectural surface. These surface-modified structures improved the light absorption and overall performance of the solar cell through changes in optical and physical properties, which we will analyze. In addition, we investigated the effect of post-cleaning on the etched glass structures through EDX analysis to understand the mechanism of the etching action. The results of this study are expected to provide important guidelines for the design and fabrication of solar cells and other photovoltaic devices.

Study on Factors that Induce Musculoskeletal Symptoms in Care Workers Who Offer Visiting Home-Help Services (방문요양 요양보호사의 근골격계 통증 유발요인에 관한 연구)

  • Kim, Deokju
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.27 no.4
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    • pp.352-360
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    • 2017
  • Objectives: This study aimed to determine the effects on musculoskeletal symptoms of both social demographic features and detailed characteristics of each task category of care workers who offer visiting home-help services. And to establish the measures that can reduce musculoskeletal symptoms among care workers. Methods: This study was conducted among 192 care workers from welfare centers C and K located in city P. After participants completed the task burden checklist regarding the scale of musculoskeletal symptoms and the details of their duties, the data collected were analyzed using the SPSS 21.0 program. Results: According to the degree of observable musculoskeletal symptoms in care workers, the highest figures were observed for back and shoulder pain. Based on the results of assessing the effect of detailed task category characteristics on musculoskeletal symptoms, "helping patients eat, helping patients move, helping patients bath, and changing body positions" were found to have an effect from the physical care category, "providing physical therapy assistance, treating bedsores" from the health care category, and "cleaning and doing laundry" from the facility management category. Conclusions: Due to the high proportion of patients requiring burdensome physical labor from care workers such as moving patients who have trouble doing so on their own, helping them change positions, and so on, it is highly likely that pain will occur in the low back, which carries most of the physical weight. So, education on human epidemiological positions that can reduce overload on areas prone to pain such as the low back and shoulders is essential. Proper equipment and personnel support must be provided for dangerous tasks. Further, multidimensional social support is required consistently.

The effect of Physical Environment on the depressive symptom of Middle-aged and Older adults : Focusing on the Mediating effects of Social Capital and Sense of Coherence (도시의 물리적 환경이 중고령자의 우울에 미치는 영향 : 사회적 자본과 통합성의 매개효과를 중심으로)

  • Jung, Eunhee;Chai, Choulgyun;Moon, Hani;Song, Na Kyoung
    • Korean Journal of Social Welfare Studies
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    • v.49 no.2
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    • pp.181-209
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    • 2018
  • This study aims to examine the relationship between physical environment and depression symptoms of middle-aged and older adults in metro city. To verify correlates of community environment and depression, mediating effect model structured by social capital and sense of coherence(SOC) were used. For the purpose, a survey was conducted aged 48 - 70 from the local community centers and senior welfare centers in Seoul, and the total collected cases were 331. After data cleaning, total 309 cases were used. The structured equation modeling applied to analyse the direct and indirect effects. The findings were followed : First, the community environment did not directly affect level of depression. Second, in the indirect effect analysis, social capital was not statistically significant, thus indirect effect was confirmed only through the SOC. To be specific, the higher the satisfaction of the physical environment increased SOC, and decreased the level of depression. The results of this study shed lights on practical interventions to promote mental health of the middle-aged and older adults those who are exposed to poor community environment.

Simultaneous Transfer and Patterning of CVD-Grown Graphene with No Polymeric Residues by Using a Metal Etch Mask

  • Jang, Mi;Jeong, Jin-Hyeok;Trung, T.Q.;Lee, Nae-Eung
    • Proceedings of the Korean Vacuum Society Conference
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    • 2013.02a
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    • pp.642-642
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    • 2013
  • Graphene, two dimensional single layer of carbon atoms, has tremendous attention due to its superior property such as high electron mobility, high thermal conductivity and optical transparency. Especially, chemical vapor deposition (CVD) grown graphene has been used as a promising material for high quality and large-scale graphene film. Unfortunately, although CVD-grown graphene has strong advantages, application of the CVD-grown graphene is limited due to ineffective transfer process that delivers the graphene onto a desired substrate by using polymer support layer such as PMMA(polymethyl methacrylate). The transferred CVD-grown graphene has serious drawback due to remaining polymeric residues generated during transfer process, which induces the poor physical and electrical characteristics by a p-doping effect and impurity scattering. To solve such issue incurred during polymer transfer process of CVD-grown graphene, various approaches including thermal annealing, chemical cleaning, mechanical cleaning have been tried but were not successful in getting rid of polymeric residues. On the other hand, lithographical patterning of graphene is an essential step in any form of microelectronic processing and most of conventional lithographic techniques employ photoresist for the definition of graphene patterns on substrates. But, application of photoresist is undesirable because of the presence of residual polymers that contaminate the graphene surface consistent with the effects generated during transfer process. Therefore, in order to fully utilize the excellent properties of CVD-grown graphene, new approach of transfer and patterning techniques which can avoid polymeric residue problem needs to be developed. In this work, we carried out transfer and patterning process simultaneously with no polymeric residue by using a metal etch mask. The patterned thin gold layer was deposited on CVD-grown graphene instead of photoresists in order to make much cleaner and smoother surface and then transferred onto a desired substrate with PMMA, which does not directly contact with graphene surface. We compare the surface properties and patterning morphology of graphene by scanning electron microscopy (SEM), atomic force microscopy(AFM) and Raman spectroscopy. Comparison with the effect of residual polymer and metal on performance of graphene FET will be discussed.

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Conservational Treatment and Deterioration Assessment of the Sculptured Standing Buddha Named Taehwa 4 Year in the Jincheon, Korea (진천태화4년명 마애불의 풍화훼손도 평가와 보존처리)

  • Lee, Chan Hee;Kim, Sun Duk;Han, Byeong Il;Kim, Yeong Taek;Lee, Myeong Seong
    • Journal of Conservation Science
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    • v.16 s.16
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    • pp.39-51
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    • 2004
  • The standing Buddha named Taehwa 4 yew in the Jincheon were sculptured with rock cliff of the dark grey shale. Front of the Buddha statue shows $N40^{\circ}W$ strike with nearly vertical dip toward the back side. Rock blocks of the Buddha statue well developed with bedding and laminations whereas rock surface distributed into the various irregular discontinuities. Sculptured lines of the Buddha were uncertain because of degradation and exfoliations on the rock surface. The surface near the Buddha statue is highly contaminated with lichen and mosses, and accelerate physical and biological weathering owing to the roots of weed and bush along the fracture systems. For the conservational treatment, we treated with primary wet cleaning by air gun and secondary cleaning treatment using distilled water. Separated rock surface and fractured parts fasten and/or fill up the boundaries of the rock blocks using epoxy resin for conservation of rock properties. Some brittle surface was treatment with water repellent consolidant of ethyl silicates, and heterogeneous surface carried out color matching by acrylic pigments. Upper part of the Buddha statue dig out small ditch for rain water drainage, and near surface of the Buddha statue treat removal works for lichen, weeds and bush. The duration capacity of the Buddha constituting rocks are degraded by various weathering factors, therefore we suggest that this Buddha statue have need to do long term monitoring and synthetic conservation researches.

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A Feasibility Study on Sewage Discharge Water Treatment for Water Reuse by Direct Contact Membrane Distillation (하수처리수 재이용을 위한 직접접촉식 막증발법 적용 가능성 연구)

  • Choi, Yongjun;Choi, Jihyuck;Shin, Yonghyun;Cho, Hyeongrak;Sohn, Jinsik;Lee, Sangho
    • Membrane Journal
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    • v.26 no.1
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    • pp.70-75
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    • 2016
  • The reuse of wastewater is being diffused to manage and develop the water resources. Generally, the treated wastewater is discharged to the river after being treated to meet the effluent quality standard or reused for diverse uses through the reprocessing. And recently, as the reuse of the treated wastewater is activated, the technologies to utilize for the high quality water resources such as industrial water by reusing the wastewater with Membrane Distillation (MD) are under development. In this study, the direct contact membrane distillation (DCMD) process has been applied to treat sewage discharge water for water reuse. The laboratory scale experiment was performed by using a hydrophobic PVDF membrane with the pore size of $0.22{\mu}m$. The influence of operating parameters, such as feed temperature, feed flow rate, feed concentration, on the permeate flux and rejection has been investigated. All filtration tests were conducted till the feed volume reached a concentration factor of 3.0. Thus, the operating period ranged between 19 hr and 49 hr depending on filtration performance. The results showed that above 92% of TN, TP, COD and TOC in the feed could be rejected regardless of an operating condition. The water flux was ranged from 13.8 to 20.3 LMH. The lowest flux was obtained at the operating condition with the feed temperature of $50^{\circ}C$ and feed flow velocity of 500 mL/min while the highest one was measured with $60^{\circ}C$ and 900 mL/min. When the concentration factor reached 3.0, water flux declined by approximately ranged from 14.5% to 33.3%. But the fouling in MD is almost fully reversible, with more than 90% recovery of permeate water flux following a DI water rinse without the addition of chemical cleaning reagents.