• Title/Summary/Keyword: Nature Environment

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Cell-meditated studies on blooming and growth of potentially ichthyotoxic Cochlodinium polykrikoides(Dinophyceae)

  • Cho, Eun-Seob
    • Proceedings of KOSOMES biannual meeting
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    • 2007.11a
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    • pp.187-188
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    • 2007
  • The fluctuations of biochemical and molecular activities III the harmful dinoflagellate, Cochlodinium polykrikoides, depending on water temperatures, were studied. In genomic DNA concentration, a similar value of 0.6 was shown at $12^{\circ}C$ and $15^{\circ}C$, but significantly increasing DNA from $18^{\circ}C$ (p<0.05), with a maximum of 1.8 at $24^{\circ}C$. After$24^{\circ}C$, the DNA significantly decreased to 0.6. Likely, the concentrations of RNA and total protein were at their highest values of 1.7 and 0.07 g $mL^1$ at $24^{\circ}C$, respectively. In contrast to ONA, RNA and total protein began to increase at $15^{\circ}C$. Oxygen availability between lower and higher temperatures was significantly different and increased from $18^{\circ}C$ according to light intensity, regardless of wavelengths (p<0.05). At $24^{\circ}C$, the highest value of the maximum electron transport rate (ETRmax), ranging from 537.9 (Ch 1) to 602.5 mol electrons $g^{-1}$ Ch1 a $s^{-1}$ (Ch 4), was also shown. Nitrate reductase (NR) and ATPase activities were at their highest values of 0.11 mol $NO_2^-g^{-1}$ Ch1 a $h^{-1}$ and 0.78 pmol 100 $mg^{-1}$ $at^2$ $4^{\circ}C$, respectively. When the cells cultured at $15^{\circ}C$, NR and ATPase activities significantly increased compared to $12^{\circ}C$ (p<0.05). In an analysis of CHN, the concentration of C and N also significantly increased (p<0.05). However, at $27^{\circ}C$, most of the molecular and biochemical movements were much lower, compared to $24^{\circ}C$. These results suggest that C. polykrikoides is very sensitive biochemical and molecular activities depending on water temperatures. Possibly, it is desirable to estimate at $18^{\circ}C$ the initiation of the massive blooming development of C. polykrikoides. In nature, it will be very difficult to maintain the massive blooms after $24^{\circ}C$ because of the possibility of significantly decreasing the molecular movement and activity of C. polykrikoides.

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Monogastric Animal Production Systems in Small Farms in Tropical Countries - Review -

  • Saadullah, M.;Saad, T.
    • Asian-Australasian Journal of Animal Sciences
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    • v.13 no.3
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    • pp.401-412
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    • 2000
  • Like other livestock, monogastric animals are essential components of the farming systems in the tropical countries. Pigs, chicken and ducks are by far the most important animals in the culture of the peoples of developing countries in the tropics. Traditionally these animals are raised in small farms and they are also the bulk producers of meat, eggs etc. in the tropics. In many countries the farmers of these small farms are unable to meet the requirement set by financial institution and other loan giving agencies for agricultural loan. Thus, the small farmers can get neither the opportunity to generate sufficient income to support the family nor to extend the livestock activities. The production systems are characterized by small number of animals with no or minimal inputs, low outputs and periodic destruction of animals by disease. Typically the litter size or flocks are small in number with each household containing 5-6 pigs and 7-10 poultry. Animals are owned by individual households and mostly maintained under a scavenging systems with little or no inputs for housing, feeding or health care. Because of the nature of this production system, productivity of these animals is rather low. The low level of inputs is due to a lack of capital and a low risk oriented outlook. The feed resource base for monogastric is scavenging and consists of household waste, roots and tuber, grain by-products and anything edible found in the immediate environment. Usually farmers select breeding gilts from their own female piglets or to a lesser extent, buy them from neighbors for natural mating. As regards poultry attempts have been made to increase egg and meat production by improving local poultry birds by upgrading and crossbreeding with exotic germ plasma in the tropics. Animal disease present a major constraint to animal production in the tropical region and the extent of the losses due to disease is very high.

A Secure Personal Health Record System for Handling of Emergency Situations (응급 상황 처리를 위한 안전한 개인건강기록 시스템)

  • Yi, Myung-Kyu;Hwang, Hee-Joung
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.16 no.5
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    • pp.117-123
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    • 2016
  • In recent years, Personal Health Record (PHR) has emerged as a patient-centric model of health information exchange. The Personal Health Record (PHR) owners enjoy the full right of accessing their records anywhere and anytime making storage and retrieval more efficient. Due to the sensitivity and confidential nature of the PHR, however, the PHR is maintained in a secure and private environment with the individual determining rights of access. In this paper, we propose a system which enables access to the user's PHR in the event of emergency. In emergency situation where the user is unconscious, the emergency staff can use the PHR information to request a emergency access to the PHR server based on the predefined rights of access for PHR. Under the proposed system, the PHR owner can specify a fine grain access control policy during emergency situations.

A review of event perception: The first step for convergence on robotics (사건지각에 대한 종설: 로봇공학과의 융복합을 위한 첫단계)

  • Lee, Young-Lim
    • Journal of Digital Convergence
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    • v.13 no.4
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    • pp.357-368
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    • 2015
  • People observe lots of events around the environment and we can easily recognize the nature of an event from the resulting optic flow. The questions are how do people recognize events and what is the information in the optic flow that enables observers to recognize events. Motor theorists claim that human observers exhibit special sensitivity when perceiving events like speech or biological motion, because we both produce and perceive those events. However, direct perception theorists suggested that speech or biological motion is not special from the perception of all other kinds of event. The purpose of this review article is to address this controversy to critique the motor theory and to describe a direct realist approach to event perception. It is important to understand the fundamental information of how human perceive event perception for the convergence on robotics.

The Effects of the Forest Experience on Elementary Students' Environmental Sensitivity and Cognition Ability (뒷산 체험 활동이 아동의 환경 감수성과 인지 능력에 미치는 영향)

  • Kim, Jeong-Suk;Jeong, Mi-Sun
    • Hwankyungkyoyuk
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    • v.22 no.4
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    • pp.14-25
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    • 2009
  • The purpose of this study was to investigate the effects of the forest experience on elementary students' environmental sensitivity and cognition ability. The forest experience was applied to the experimental group and the control group was taught by the traditional teaching method focused on teachers' lecture for 8 lessons. The pre-test, the 1st, and 2nd post-test for environmental sensitivity were applied to both groups to analyze the effects of the forest experience. After then the results were analyzed by One-way ANOVA and ANCOVA. And the narration test for cognition ability on learning a environmental context was applied to only the experimental group and the results were analyzed. As a result, the students' environmental sensitivity was not significantly different(p<.05) between experimental and control groups in terms of the pre-test score. However, the 1st and 2nd post-test scores of experimental group were significantly higher than those of the control group in term of the level of environmental sensitivity(F=9.28, p<.01, F=10.95, p<.01). The results of the forest experience in the aspect of cognition ability, 'the sound of nature(61%)', 'the smiling forest path which blooming out(57%)', and 'one's own places(52%) were high but 'the kinds and characteristics of the roots(30%)' was low. In conclusion, the forest experience made a positive effect on the students' environmental sensitivity and cognition ability through the direct observation, data collection, and analysis on the nearby natural environment.

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The Meaning of Good Dying of Chinese Terminally Ill Cancer Patients in Taiwan

  • Chao, Co-Shi Chantal
    • 한국호스피스완화의료학회:학술대회논문집
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    • 2000.12a
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    • pp.162-174
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    • 2000
  • The purpose of this hermeneutic study was to investigate the meaning of "good dying" of Chinese terminally ill cancer patients in Taiwan; the factors related to this morning; and the strategies cancer patients used to ensure "good dying". Indepth unstructured interviews, prolonged participant observations, and review of clinical records were selected as the methods for data collection. In the four and one-half month period of data collection, the researcher was in the role of a full time clinical nurse specialist who directly took care of the subject patients in 4 hospitals and in patients' homes. The 20 subject were selected purposively according to selection criteria and various demographic backgrounds. Interview transcripts and field notes comprised the data for analysis. The results were composed by 3 constitutive patterns and 12 themes. Achieving inner peace appeared to herald the good dying state. The "good dying" for Chinese terminally ill cancer patients in Taiwan meant peace of body, peace of mind, and peace of thought. The constitutive pattern of peace of body included 4 themes: (1)minimizing the agony of physical symptoms; (2)short period of dying process without lingering death; (3) cleanliness, neatness, and integrity of the body; and (4) mobility. The constitutive pattern of peace of mind included 5 themes: (1) yielding; (2) non-attachment; (3) not to be lonely; (4) settle down all affairs; and (5) being in a preferred environment and enjoying nature. The third constitutive pattern of peace of thought included 3 themes: (1) getting through day by day without thinking; (2) meaningful life; and (3) expectation that the suffering would be ending. Through understanding of the terminally ill cancer patient' needs in their meanings of "good dying", recommendations can be made for humanistic care. The findings of this study have recommendations for care givers daily contact with dying patients and for medical and nursing education.

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The Prospect of Methanol and Its Meaning (메탄올의 전망(展望)과 그 의미(意味))

  • Uhm, Sung-Jin
    • Applied Chemistry for Engineering
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    • v.3 no.1
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    • pp.1-6
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    • 1992
  • In this energy and environment conscious age, methanol has come to attention increasingly since the well established process is commercially available to produce methanol from abundant low grade carbonaceous resources ; methane, carbon dioxide, coal and biomass etc. Methanol is a Clean energy source which is a readily storable and transportable liquid. It is elaborated to correlate power generation, city gas and chemical feed stocks including transportation fuel, enhancing the national efficiency of resource utilization as well as reducing the environmental problems for the future via C1 technology. It is emphasized that $CO_2$ could be used to produce methanol as a mean of hydrogen storage as in the nature, which will alleviate the environmental problem such as green house effect.

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Research Perspective of an Extremophilic Bacterium, Deinococcus radiodurans on Bioremediation of Radioactive Wastes (방사성 폐기물의 생물정화를 위한 극한세균 데이노코쿠스 라디오두란스의 연구적 고찰)

  • Jeong, Sun-Wook;Choi, Yong Jun
    • Applied Chemistry for Engineering
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    • v.28 no.2
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    • pp.133-140
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    • 2017
  • Increasing concerns on radioactive wastes have drawn much attention on the development of remediation technologies. Massive amounts of radioactive wastes generated from hospital and nuclear power plants were exposed to our environment. Although physicochemical removal methods were developed, an eco-friendly remediation method has not yet been demonstrated. Recently, an extremophilic bacterium has received much attention due to their extraordinary characteristics. Among them, Deinococcus radiodurans (D. radiodurans) strain was regarded as the best host organism for the removal of radioactive heavy metals and radionuclides, because of their superb characteristics like tolerance against the high level of radioactivity. In this article, we briefly introduced the extraordinary nature of D. radiodurans and also discussed the potential use of D. radiodurans strain for the removal of radioactive wastes.

SOP (Search of Omics Pathway): A Web-based Tool for Visualization of KEGG Pathway Diagrams of Omics Data

  • Kim, Jun-Sub;Yeom, Hye-Jung;Kim, Seung-Jun;Kim, Ji-Hoon;Park, Hye-Won;Oh, Moon-Ju;Hwang, Seung-Yong
    • Molecular & Cellular Toxicology
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    • v.3 no.3
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    • pp.208-213
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    • 2007
  • With the help of a development and popularization of microarray technology that enable to us to simultaneously investigate the expression pattern of thousands of genes, the toxicogenomics experimenters can interpret the genome-scale interaction between genes exposed in toxicant or toxicant-related environment. The ultimate and primary goal of toxicogenomics identifies functional context among the group of genes that are differentially or similarly coexpressed under the specific toxic substance. On the other side, public reference databases with transcriptom, proteom, and biological pathway information are needed for the analysis of these complex omics data. However, due to the heterogeneous and independent nature of these databases, it is hard to individually analyze a large omics annotations and their pathway information. Fortunately, several web sites of the public database provide information linked to other. Nevertheless it involves not only approriate information but also unnecessary information to users. Therefore, the systematically integrated database that is suitable to a demand of experimenters is needed. For these reasons, we propose SOP (Search of Omics Pathway) database system which is constructed as the integrated biological database converting heterogeneous feature of public databases into combined feature. In addition, SOP offers user-friendly web interfaces which enable users to submit gene queries for biological interpretation of gene lists derived from omics experiments. Outputs of SOP web interface are supported as the omics annotation table and the visualized pathway maps of KEGG PATHWAY database. We believe that SOP will appear as a helpful tool to perform biological interpretation of genes or proteins traced to omics experiments, lead to new discoveries from their pathway analysis, and design new hypothesis for a next toxicogenomics experiments.

A Study on Nursing Students' Volunteer Experience in Visiting Ambulatory Bathing Service (간호대학생의 방문이동목욕 봉사경험 연구)

  • Hwang, Seung-Sook
    • Research in Community and Public Health Nursing
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    • v.15 no.2
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    • pp.308-322
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    • 2004
  • Purpose: 'The purpose of the present study was to understand students' experiences from their standpoint, to identify relevant variables and to examine into their relations by analyzing and describing what phenomenon 'nursing students' visiting ambulatory bathing service' is, what are the reasons for the phenomenon, and what interactions are in the phenomenon. Method: The subjects were thirteen students. Data were collected through in-depth interviews and analyzed by Strauss and Corbin's analysis method. Result: With regard to ambulatory bathing service, participants responded 'lack of education', 'inexperienced personal relations' and 'disappointment with recipients families'. They recognized 'burden' and 'compassion'. The intensity of generated 'burden' and 'compassion' was determined by volunteering persons, the degree of health care service, recipients' response and interaction of climate. When 'burden' and 'compassion' were generated, participants selected their own coping strategies. Strategies in the situation of 'burden' and 'compassion' were significantly influenced by 'burden' and 'compassion' and structural situation - 'mutual relation structure,' 'volunteers' capability,' 'the degree of volunteering guidance,' 'community participation,' 'recipients' environment,' 'information sharing,' 'special vehicle equipment' and 'economical burden.' Strategies include' service training,' 'receiving volunteering training,' 'preliminary service preparation,' 'volunteering.' 'connection to local medical center,' 'intention,' 'information sharing,' 'passive response to recipients' appreciation' and 'the understanding of publicity'. The results of selected 'burden' and 'compassion' are described with 'worthiness' and 'cohesion' as follows. Conclusion: This study is significantly meaningful in that it examined bathing service welfare in its initial stage. There are not much outcome from previous studies. However. it is meaningful that this study intended to develop theories on the nature of experiences and the relations among concepts derived from the visiting ambulatory bathing service process of nursing students. Professors who taught social volunteering in universities understood the experience of nursing students who did the visiting ambulatory bathing service. Consequently, professors will provide an effective instruction to enable these students to carry out visiting ambulatory bathing services efficiently in order to meet demands when they conduct the services. For the volunteering service activity in major-related fields among college students' social volunteering activities, they recognized the necessity of systematic education and preparation.

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