• Title/Summary/Keyword: External Quality

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Accuracy analysis on the temperature measurement with thermistor (인공위성용 서미스터의 온도측정 정확도 분석)

  • Suk, Byong-Suk;Lee, Yun-Ki;Lee, Na-Young
    • Aerospace Engineering and Technology
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    • v.7 no.1
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    • pp.115-120
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    • 2008
  • The thermistors and AD590 are widely used for temperature measurement in space application. The resistance of thermistor will vary according to the temperature variation therefore the external voltage or current stimulus signal have to be provided to measure resistance variation. Recently high resolution electro optic camera system of satellite requires tight thermal control of the camera structure to minimize the thermal structural distortion which can affects the image quality. In order to achieve $1^{\circ}$(deg C) thermal control requirement, the accuracy of temperature measurement have to be higher than $0.3^{\circ}$(deg C). In this paper, the accuracy of temperature measurement using thermistors is estimated and analyzed.

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The Review of Clinical Studies Published in The Journal of Korean Medical Ophthalmology & Otolaryngology & Dermatology (한방안이비인후피부과학회지에 게재된 임상실험연구에 대한 고찰)

  • Kim, Chul-Yun;Seo, Hyung-Sik;Kim, Nam-Kwen;Lee, Dong-Jin;Kwon, Kang
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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    • v.27 no.4
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    • pp.1-15
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    • 2014
  • Objective : This study was carried out to analyze the quality and quantity of Clinical Trials that have been published in the journal of korean medical ophthalmology, otolaryngology, dermatology(JKOOD). Methods : We analyzed 25 clinical trials that published in JKOOD from 1988 to 2014. We excluded case reports, protocol and retrospective studies and classified searched papers into three categories; Randomized Clinical Trials(RCT), Non Randomized Clinical Trials(NRCT), Before After Study(BAS) by using study Design Algorithm for Medical literature of Intervention(DMAI). All articles were analyzed according to diagnosis, statistics program and intervention period. The bias of RCTs were evaluated by Cochrane Risk of Bias(RoB). Result : 1. The number of searched journals is 25 papers; 13 RCT, 2 NRCT, 10 BAS 2. Distribution of clinical trial; 'Atopic dermatitis' ranked the highest(44%) in disease, 'External application' raked the highest(71%) in treatment method. 3. 'allocation sequence' and 'prevention of allocated intervent to patients and therapists' are graded 'Low' but 'incomplete outcome date' and 'selective outcome' are graded 'Uncertain'. Conclusions : It is necessary to study more RCT. It will be helpful to study systematic reviews and meta analysis in JKOOD.

Characterization of microbiota diversity of engorged ticks collected from dogs in China

  • Wang, Seongjin;Hua, Xiuguo;Cui, Li
    • Journal of Veterinary Science
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    • v.22 no.3
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    • pp.37.1-37.14
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    • 2021
  • Background: Ticks are one of the most common external parasites in dogs, and are associated with the transmission of a number of major zoonoses, which result in serious harm to human health and even death. Also, the increasing number of pet dogs and pet owners in China has caused concern regarding human tick-borne illnesses. Accordingly, studies are needed to gain a complete understanding of the bacterial composition and diversity of the ticks that parasitize dogs. Objectives: To date, there have been relatively few reports on the analysis of the bacterial community structure and diversity in ticks that parasitize dogs. The objective of this study was to investigate the microbial composition and diversity of parasitic ticks of dogs, and assessed the effect of tick sex and geographical region on the bacterial composition in two tick genera collected from dogs in China. Methods: A total of 178 whole ticks were subjected to a 16S ribosomal RNA (rRNA) next generation sequencing analysis. The Illumina MiSeq platform targeting the V3-V4 region of the 16S rRNA gene was used to characterize the bacterial communities of the collected ticks. Sequence analysis and taxonomic assignment were performed using QIIME 2 and the GreenGene database, respectively. After clustering the sequences into taxonomic units, the sequences were quality-filtered and rarefied. Results: After pooling 24 tick samples, we identified a total of 2,081 operational taxonomic units, which were assigned to 23 phyla and 328 genera, revealing a diverse bacterial community profile. The high, moderate and low prevalent taxa include 46, 101, and 182 genera, respectively. Among them, dominant taxa include environmental bacterial genera, such as Psychrobacter and Burkholderia. Additionally, some known tick-associated endosymbionts were also detected, including Coxiella, Rickettsia, and Ricketssiella. Also, the potentially pathogenic genera Staphylococcus and Pseudomonas were detected in the tick pools. Moreover, our preliminary study found that the differences in microbial communities are more dependent on the sampling location than tick sex in the tick specimens collected from dogs. Conclusions: The findings of this study support the need for future research on the microbial population present in ticks collected from dogs in China.

Effects of Light-Quality Control on the Plant Growth in a Plant Factory System of Artificial Light Type (인공광 식물공장내 광질 제어가 작물생육에 미치는 영향)

  • Heo, Jeong-Wook;Baek, Jeong-Hyun
    • Korean Journal of Environmental Agriculture
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    • v.40 no.4
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    • pp.270-278
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    • 2021
  • BACKGROUND: Horticultural plant growth under field and/or greenhouse conditions is affected by the climate changes (e.g., temperature, humidity, and rainfall). Therefore investigation of hydroponics on field horticultural crops is necessary for year-round production of the plants regardless of external environment changes under plant factory system with artificial light sources. METHODS AND RESULTS: Common sage (Salvia plebeia), nasturtium (Tropaeolum majus), and hooker chive (Allium hookeri) plants were hydroponically culturing in the plant factory with blue-red-white LEDs (Light-Emitting Diodes) and fluorescent lights (FLs). Leaf numbers of common sage under mixture LED and FL treatments were 134% and 98% greater, respectively than those in the greenhouse condition. In hooker chives, unfolded leaf numbers were 35% greater under the artificial lights and leaf elongation was inhibited by the conventional sunlight compared to the artificial light treatments. Absorption pattern of NO3-N composition in hydroponic solution was not affected by the different light qualities. CONCLUSION(S): Plant factory system with different light qualities could be applied for fresh-leaf production of common sage, nasturtium, and hooker chive plants culturing under field and/or greenhouse. Controlled light qualities in the system resulted in significantly higher hydroponic growth of the plants comparing to conventional greenhouse condition in present.

Herbal Medicine Treatment for Persistent Night Sweats in Soyangin Patients: A Retrospective Case Series (한약 단독 치료로 호전된 소양인 환자의 도한 : 후향적 증례보고 6례)

  • Lee, Min-jung;Lee, Jiyeon;Hwang, Min-woo
    • Journal of Sasang Constitutional Medicine
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    • v.33 no.3
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    • pp.146-160
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    • 2021
  • Introduction This study is the first to report a significant improvement of Soyangin patients with persistent night sweats through herbal medicine treatment. Methods We reviewed the total of 6 Soyangin patients with moderate to severe persistent night sweats who visited the outpatient clinic. The patients received herbal medicine treatment alone for 4 to 9 weeks. We evaluated the treatment outcome using Night Sweats Degree criteria, developed by Lea and Aber(1985), every other 2 to 4 weeks. In addition, we recorded the treatment period from the first visit to symptom alleviation. Results Persistent night sweats improved significantly in all 6 Soyangin patients, and 4 out of 6 patients had better sleep quality after the treatment. It took 1 to 3 weeks until the symptom alleviated from moderate or severe to mild, and 3 to 7 weeks until the patients have no sign of night sweating. The progression of persistent night sweats and treatment period until no sign of symptom varied according to the Soyangin External and Internal disease diagnosis. Discussion The Soyangin patients having persistent night sweats treated with herbal medicines showed a significant improvement in their symptoms. This result proposes the possibility of using herbal medicine in primary care patients experiencing persistent night sweats.

Correlation between the Oswestry Disability Index, Berg Balance Scale, and Kinematic Data during Gait Analysis in Elderly People with Chronic Back Pain (만성 허리 통증 노인의 오스웨스트리 장애지수, 버그 균형 척도, 보행 시 운동학적 움직임과의 상관관계)

  • Hwang, Young-In;Kim, Ki-Song
    • Journal of the Korean Society of Physical Medicine
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    • v.16 no.2
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    • pp.71-79
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    • 2021
  • PURPOSE: Chronic low back pain is one of the main factors that affect the quality of life and cause problems of gait and balance in elderly people. This study investigated the correlation between the Oswestry disability index (ODI), Berg balance scale (BBS), and kinematic data measured while analyzing the gait of elderly people with chronic back pain. METHODS: A total of 29 subjects participated in this study. The ODI, BBS, and kinematic data of lower extremities were measured while walking. All data were analyzed using Pearson's correlation coefficients and the significance was measured at .05. RESULTS: ODI had a significant correlation with 1, 13, and 14 items of BBS (p < .05), and left hip external rotation and right ankle abduction respectively in the stance and swing phase of gait (p < .01). 13 items of BBS had a significant correlation with the right ankle abduction in the stance phase of gait (p < .01). In addition, 14 items of BBS had a significant correlation with right and left ankle abduction in the stance and swing phase of gait (p < .01). CONCLUSION: While attempting to predict chronic low back pain and balance issues, it may be useful to check the right ankle abduction in the stance and swing phase of gait. In the future, it would be helpful if some simple tests could be designed to assess balance in elderly people with chronic low back pain.

Effect of Chestnut Flour on the Rheology of Dough and Processing Adaptability of White Pan Bread (밤가루 첨가가 밀가루 반죽의 물성과 제빵 적성에 미치는 영향)

  • Oh, Chul-Hwan;Kim, Yong-Moon;Han, Min-Su;Oh, Nam-Soon
    • Food Engineering Progress
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    • v.15 no.1
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    • pp.15-21
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    • 2011
  • The effects of replacement of wheat flour with 10, 20, and 30% chestnut flour on the bread-making properties and quality characteristics of bread were evaluated. Among the physical characteristics of the dough, the development time in the farinogram decreased with increasing amounts of chestnut flour, and the dough stability and durability were reduced. In the amylogram, there was a slight increase in the gelatinization starting temperature when compared to the control flour, but the maximum viscosity gradually decreased in response to increasing amounts of chestnut flour. The expansion ratio did not increase in the dough containing 20 or 30% chestnut flour. Moreover, the loaf volume and specific volume of bread containing 20 and 30% chestnut flour were smaller than those of the control and the 10% treatment. The hardness of bread containing 10% chestnut flour($700g/cm^2$) was lower than that of the other treatments($1413-1,627g/cm^2$). Furthermore, bread containing 10% chestnut flour had denser porous structures than the other treatments. The sensory evaluation tests revealed that the 10% treatment had higher sensory scores for the internal and external qualities of bread than the other treatments.

Conceptual Understanding of Thought-Action Fusion and Cognitive Fusion : Focus on Obsessive-Compulsive Symptoms (사고-행동 융합과 인지적 융합의 개념적 이해 : 강박증을 중심으로)

  • Lee, Sang Won;Lee, Kyung-Uk;Choi, Mina;Lee, Seung Jae
    • Anxiety and mood
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    • v.15 no.1
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    • pp.1-12
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    • 2019
  • Thought-action fusion (TAF) is a tendency to blindly assume causal relations between their thoughts and external reality. On the other hand, cognitive fusion (CF) is a tendency to take internal experiences, such as thoughts and feeling, literally rather than view them as random events. However, these two terms are often confusedly used and, in fact, have conceptual overlaps. Therefore, this study aimed to identify their distinctive features through a comprehensive review of the definition, origin, measurements and clinical implications especially on the understanding of obsessive-compulsive symptoms. The cognitive-behavioral concept of TAF is confined to erroneous and maladaptive beliefs about the connection between thoughts and behaviors. The CF is a broader construct that entails taking thoughts and feelings as facts and engaging or struggling with them such that the quality of life is lowered. They also have different theoretical backgrounds, developing processes and therapeutic approaches. From the perspective of the obsessive-compulsive disorder, both concepts have been studied as mid-structures for this illness. Recently, the effectiveness of psychological therapies related to these concepts such as defusion therapy has been tested. However, it is yet still in its infancy. In the future, complementary advances between the two concepts with studies on biological substrates is needed.

A study on the friction head loss in flat aluminum micro multi tubes with nonazeotropic refrigerant mixtures R-410A (비공비 혼합냉매 R-410A를 적용한 납작한 알루미늄 마이크로 멀티 튜브에서의 마찰손실에 관한 연구)

  • Lee, Jeong-Kun;Min, Kyung-Ho
    • Design & Manufacturing
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    • v.13 no.2
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    • pp.37-43
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    • 2019
  • This study conducted a research as to condensation heat transfer friction loss headby using three types of flat micro multi-channel tubes with different processing of micro-fin and number of channels inside the pipes and different sizes of appearances. In addition, identical studies were conducted by using smoothing circular tubes with 5mm external diameter to study heat enhancement factor and pressure drop penalty factor. 1) The friction head loss showed an increase as the vapor quality and mass flux increased. In case of saturation temperature, it shows an increase as it gets lower. These factors are the reason occurring as the lower the saturation temperature is, the higher the density of refrigerant vapor gets. The influence of heat flux is similar as the dryness is low, but as it gets higher, it lowers in heat flux, and as the high temperature of high heat flux, it is a factor that occurs as the density gets lower. 2) RMS error of the in case of friction head loss, it showed to be predicted as 0.45~0.67 by Chisholm, Friedel, Lockhart and Martinelli. 3) As forfriction head loss penalty factor, the smaller the aspect ratio is, the larger the penalty factor gets, and as for the effect of micro-fin, the penalty factor increased because it decreases to the gas fluid the way groove for the refrigerant's flow.

Reminiscence Reflecting Cultural Background in Korean Older Adults with Dementia: A Concept Analysis (한국치매노인의 문화를 반영하는 회상: 개념분석)

  • Jung, Gi-Jung;Park, Jong-Min;Lee, Guk-Geun;Chong, Mi-Kyong;Sim, Hye-Been;Lee, Jia;Han, Heeyoung
    • Journal of East-West Nursing Research
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    • v.24 no.2
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    • pp.110-118
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    • 2018
  • Purpose: Reminiscence therapy is a widely used intervention for older adults and those with dementia. However, the attributes of the concept of reminiscence is not clearly proposed. The aim of this study was to clarify the concept of reminiscence in Korean older adults with dementia. Methods: The study applied the concept analysis method of Walker and Avant. The literature review included the previous studies of reminiscence from philosophy, literature, art, neuroscience, medicine, psychology, sociology, and nursing. Results: A total of 43 Korean or international papers were analyzed in this study. Attributes of reminiscence in Korean older adults with dementia were regeneration of memories, internal and external communications, expression of suppressed emotions, and recognition of ego identity. The suppressed emotions and ego identity may result from Korean cultural characteristics based on the suppressed environments of many wars and dictatorships in the past. The consequences of reminiscence in Korean older adults with dementia are cognitive enhancement, relief of depression, and improvements of social interactions, ego integrity, and quality of life. Conclusion: The results of this study suggest that the historical and cultural characteristics should be considered to develop effective nursing interventions including reminiscence for Korean older adults with dementia.