• Journal of rehabilitation welfare engineering & assistive technology
• /
• v.4 no.1
• /
• pp.81-86
• /
• 2010

This paper is case study on design, manufacture and application of customized assistive device for the ADL of person with brain lesions. The study had carried out from October 2010 to November 2010 and 2 clients from Assistive device case management demonstration project which is performed by Daegu assistive and rehabilitation center had participated. Case A, a 47-year-old man with brain lesions, stays only on the floor and could not get close to the usual toilet by himself because of the poor low extremities muscle strength and function. The moveable-toilet and customized ramp had applied to Case A. He clambers up the ramp and reach to the toilet easily. Case B, a 8-year-old boy with brain lesions, had difficulties with self-feeding because of his clumsy hand. Several existing feeding aids were applied but not appropriated. A customized feeding aid was designed and manufactured out of regard of Case A's ROM and right hand size. And his occupational therapist works together continuously to make him feed himself in the near future. Already-made assistive devices were not appropriate to Case A and B and to solve this problem, customized assistive devices were applied. The importance and needs of design and manufacture of assistive device were recognized through these case study.

• Korean journal of communication and information
• /
• v.59
• /
• pp.116-137
• /
• 2012

What is 'nation' and 'nationalism?' What does 'korean nationalism' mean? And how is korean nationalism represented through a chain of films called 'the korean blockbuster films?' The purpose of this study is to answer to these questions. The characteristics of the korean blockbuster films have been studied for quite a long time and the researchers have agreed with the context about nationalism in a large sense. However, majority of the studies ends up in the journalistic or impressionistic criticism without any theoretical discussion. Few theoretical criticisms also have founded on the formation process of nation of the Western Europe and their nationalism. Hence I would like to add the discourse of korean nationalism and to seize more accurately the social/cultural/historical peculiarity of the korean blockbuster films. In addition, as non-nationalist narratives have recently emerged, korean blockbuster films are entering to the evolution process. On this, the significance of this study seems to exist in providing a cornerstone to the expected evolution theory of the korean blockbuster films by means of complementation and reestablishment of nationalism of their first generation. and , presenting socio-historical peculiarity of the Korean nation, are examined by the close textual analysis.

• Journal of Korean Academy of Fundamentals of Nursing
• /
• v.7 no.1
• /
• pp.71-85
• /
• 2000

Social support was found to have buffering effects on the stress response of stroke patients. Especially, the aspects of social support found to be most influential were support from a close, personal source, and overall satisfaction with support. The purpose of this study was to identify the current social network and its characteristics according to gender difference in post-hospitalized stroke patients in Korea. The sample consisted of a convenience sample of 254 patients was recruited 129 men and 125 women who were receiving follow-up care at outpatients clinics. Four aspects of social support-source, quantity, qualify & type- were measured using the modified Social Support Inventory for Stroke Survivors(SSISS) which was developed by McColl & Friedland(1989). Regarding sources of social support, 61.4% reported for 'spouse' as primary caregiver and 31.9%, 'children'. But the distribution of sources of personal support were related to gender; 82.2% of male patients had support from their spouses, while only 40% of female patients reported from 'spouse' but 51.4% from 'children'. Among the children, daughters and sons were more significant support persons than daughters-in-law. The percentages for sources of these significant other support persons were 55.5% for 'children', 8.7% for 'spouse', and 8.3% for 'brothers'. The physician at the outpatient department was the main source of professional support. For the quantify and qualify of social support, the primary caregiver's support was more significant than support by significant other persons. Male patients reported that primary the caregiver' support was greater than that of significant other persons, while female patients perceived significant other persons as giving greater support. Regarding the type of perceived social support, the stroke patients were highly satisfied with the primary caregiver's support in aspects of instrumental, emotional, and informational support. They also reported high satisfaction with support from significant others' support in the aspect of emotional support, while emotional and informational support from professionals was reported as satisfactory. In conclusion, gender difference in the social support network was found in that male patients perceived more support from their spouses, while female patients perceived more support from their children as compared to their spouses.

• Journal of the Korean Solar Energy Society
• /
• v.28 no.2
• /
• pp.64-69
• /
• 2008

As the grid-connected photovoltaic power conditioning systems (PVPCS) are installed in many residential areas, these have raised potential problems of network protection on electrical power system. One of the numerous problems is an Islanding phenomenon. There has been an argument that it may be a non-issue in practice because the probability of islanding is extremely low. However, there are three counter-arguments: First, the low probability of islanding is based on the assumption of 100% power matching between the PVPCS and the islanded local loads. In fact, an islanding can be easily formed even without 100% power matching (the power mismatch could be up to 30% if only traditional protections are used, e.g. under/over voltage/frequency). The 30% power-mismatch condition will drastically increase the islanding probability. Second, even with a larger power mismatch, the time for voltage or frequency to deviate sufficiently to cause a trip, plus the time required to execute a trip (particularly if conventional switchgear is required to operate), can easily be greater than the typical re-close time on the distribution circuit. Third, the low-probability argument is based on the study of PVPCS. Especially, if the output power of PVPCS equals to power consumption of local loads, it is very difficult for the PVPCS to sustain the voltage and frequency in an islanding. Unintentional islanding of PVPCS may result in power-quality issues, interference to grid-protection devices, equipment damage, and even personnel safety hazards. Therefore the verification of anti-islanding performance is strongly needed. In this paper, improved RPV method is proposed through considering power quality and anti-islanding capacity of grid-connected single-phase PVPCS in IEEE Std 1547 ("Standard for Interconnecting Distributed Resources to Electric Power Systems"). And the simulation results are verified.

• Journal of the Korea Society of Computer and Information
• /
• v.15 no.12
• /
• pp.75-84
• /
• 2010

As broadcasting in Mobile Ad hoc NETwork (MANET) is the process that a node sends a packet to all other nodes in the network. it is used for routing protocols such as Ad hoc On demand Distance Vector (AODV) to disseminate control information for establishing the routes. In this paper, we propose Probabilistic Broadcasting mechanism based on Distance Ratio between sender and receive node in MANETs. The proposed approach is based on the combination of probability and distance based approach. A mobile node receiving broadcast packets determines the probability of rebroadcasting considering distance ratio from sender. The distance ratio of a node is calculated by the distance from sender and the length of radio field strength. As a node with high distance ratio is located far away from sender, rebroadcast probability is set to high value. On contrary, the low rebroadcast probability is set for a node with low distance ratio which is close to sender. So it reduces packets transmission caused by the early die-out of rebroadcast packets. Compared with the simple flooding and fixed probabilistic flooding by simulation, our approach shows better performances results. Proposed algorithm can reduce the rebroadcast packet delivery more than 30% without scanting reachability, where as it shows up to 96% reachability compared with flooding.

• Journal of the Korean Geographical Society
• /
• v.51 no.2
• /
• pp.269-281
• /
• 2016

This article problematizes and interrogates the idea of 'community' which is increasingly important in Korean urban policy-making. For the purpose, this article scrutinizes, and compares, how ordinary citizen participants and civil society activist organizations in a 'community garden' program of Seoul make sense of, utilize, and practice the policy concept. The neo-Faucauldian perspective of 'governmentality' is employed to understand the association between the community-focused policy program and neoliberalism, but Barnett's( 2005) call for 'bottom-up governmentality' is taken seriously in order to avoid any deterministic interpretation. On the basis of this eclectic perspective on governmentality, this article presents empirical findings that may suggest a contestation over community between ordinary citizens and civil society activists. More specifically, ordinary citizen participants prioritize place-based, on-the-ground community experiences that are built on common cultivation practices, whereas civil society activists tend to consider community garden as a teleological governmental technology generative of particular citizen subjects. Civic community garden advocacy as such aims to address social, economic, and spatial problems that neoliberalsim has produced, but it also appears to be in a close association with neoliberal urban policy. Thus, the community activism's meaningfulness lies in its active intervention to neoliberal urban policy, but a gap between ordinary practical achievements and civic activism can be a potential danger to urban community policy. On the basis of this discussion, this article asks more detailed investigations about the taken-for-granted positivity of urban community (re)vitalization programs, and also examinations on whether and how such projects generates emergent tensions between ordinary achievements and policy prescriptions.

• Journal of the Korea Concrete Institute
• /
• v.17 no.2 s.86
• /
• pp.273-297
• /
• 2005

In construction site, there are some occasions where concrete under initial curing is being affected by nitration from nearby vibration sources. To study these effects, in this paper, strength characteristics of concrete specimens subjected to continuous vibration up to 12 hours in vertical direction after concrete placement were observed. And through the vibration time control experiment where a number of time combinations consisted of times before and after applying vibration during initial curing period were used as experimental parameters, possibility of concrete strength improvement was investigated. From the experimental results, it could be seen that the concrete strengths were mostly decreased due to the increase of vibration velocity during initial curing period. But fluctuation ratio of concrete strength did not have any close correlations with the vibration times. And results of vibration time control experiment showed that if times before applying vibration sustains at least more than 3 hours, subsequent vibrations after that hours do not affect the concrete strength in any unfavorable ways.

• Journal of the Korea Institute of Building Construction
• /
• v.17 no.1
• /
• pp.73-81
• /
• 2017

In this paper, the periods of cold weather concrete and early frost damage depending on each region in South Korea were studied using the climate data from Korea meteorological administration. The specifications of Korea Concrete Institute(KCI) and Architectural Institute of Japan(AIJ) were applied to provide the periods of cold weather concrete. The periods of early frost damage risk(EFD) were calculated by Hasegawa's suggestion depending on 91 cities in Korea. Climate data for 5 years (2008~2012) were used to obtain both of the periods. Existing data from 1971 to 2000 were also used to compare differences in the periods between past and present study. The periods of cold weather concrete by KCI were calculated about 98 days on average. As the latitude goes up and close to mountain areas, the periods tend to be increased. The periods by present study was shown to be reduced compared to that of previous study by 1~2days. The period of EFD was provided with the level of daily lowest temperature from $-5^{\circ}C$, $-2^{\circ}C$ and $0^{\circ}C$. The beginning day of the period of EFD was earlier than the period of cold weather concrete and the finishing day of the period of EFD was later than the period of cold weather concrete.

• KSBB Journal
• /
• v.22 no.6
• /
• pp.414-420
• /
• 2007

Nanomaterials have been applied to various fields due to their advantageous characteristics such as high surface area, rapid diffusion, high specific surface areas, reactivity in liquid or gas phase, and a size close to biomacromolecules. Up to date, increased manufacturing and frequently use of the materials, however, revoke people's concerns on their hazard impact including toxicity the materials. Many research groups have carried out different protocols to evaluate toxic effects of nanomaterilas on different organisms, and consequently, nanomaterials are known to cytotoxicity. In this paper, we reviewed some of the most reports on toxic effects of several nanoparticles specifically on bacteria. There are numbers of reports focused on antibacterial effect of nanoparticles based on bacterial cell viability. Therefore, the application of each nanomaterial should be concerned with its toxicity and its toxic effect should be evaluated in terms of concentrations and sizes of the nanomaterials used, prior to use of a nanomaterial.

• Journal of the Economic Geographical Society of Korea
• /
• v.12 no.4
• /
• pp.627-644
• /
• 2009

In the knowledge-based economy highlighting the importance of human capital, there has been a growing interest in human capital externalities as a fundamental engine of growth and development of a region. The purpose of this study is to analyze human capital externalities using 3-level hierarchical linear model(3-HLM), decomposing determinants of wages into three levels involving workers(level-1) nested within firms(level-2) nested within regions(level-3). This study separately estimates the effect of the average education level on the wages by three different schooling groups on the assumption that the intensity of knowledge spillovers varies with each group's schooling level. The main results are as follows; First, the coefficient of the average education level of a region shows 0.044, indicating that one-year increase in the average level of schooling could increase average individual earnings by 4.4%. Secondly, the external effects of human capital on three different schooling groups are considerably different, raising less than high school graduates' wages by 3.0%, college graduates' wages by 4.7%, and graduate schools' wages by 11.8%, respectively. Thirdly, well educated workers are much more sensitive to the variation of the regional education level than less educated ones when we apply the shares of each schooling group as alternative measures for the average level of education. Such findings of this study draw an implication that local governments could speed up regional economic growth in the knowledge-based economy by not only raising total human capital stock in a region but building the close networks that promote productivity-enhancing human capital external effects.