• 셀메드
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• 제11권4호
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• pp.18.1-18.8
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• 2021

Jawarishe Jalinoos (JJ) is an orally used formulation available in semisolid dosage form, prepared with powdered plant materials mixed in honey or sugar syrup. It has many admirable pharmacological effects and used in Unani medicine to treat various acute and chronic disorders since ancient times. The ICH Harmonised Tripartite Guideline stated that photostability testing should be an essential part of stability testing to confirm that light exposure does not result in an unacceptable change in drugs substance and finished products. To date, the effect of light on JJ is not studied, in this study photostability evaluation of JJ was carried out. The test sample was manufactured with genuine ingredients in the in-door pharmacy of the National Institute of Unani Medicine. JJ was packed in two transparent polyethylene terephthalate airtight containers. The first sample was analysed at zero-day and the second sample was placed in a stability chamber subjected to light challenge with an overall illumination of 1.2 million lux hours combined with near ultraviolet energy of 200-watt hours per square meter by using option 2, along with 30±2℃ temperature and relative humidity 70±5%. Analysis of both finished products showed no considerable changes in organoleptic characters. Less than 5% variation was observed in physicochemical parameters. HPTLC fingerprinting showed justifiable variation. Microbial load and specific counts were within the limit prescribed by WHO. As no unacceptable changes were noted in JJ subjecting to light challenge, it is concluded that JJ is a photostable Unani compound formulation.

• Smart Structures and Systems
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• 제30권3호
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• pp.327-332
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• 2022

In building envelope, transparent components play an important role. The structural glazing systems are the weak element of the casing in terms of mechanical resistance, thermal and acoustic insulation. In the present work, new structural glass panels with granular aerogel in interspace were investigated from different points of view. In particular, the mechanical characterization was carried out in order to assess the resistance to bending of the single glazing pane. To this end, a special instrument system was built to define an alternative configuration of the coaxial double ring test, able to predict the fracture strength of glass large samples (400 × 400 mm) without overpressure. The thermal and lighting performance of an innovative double-glazing façade with granular aerogel was evaluated. An experimental campaign at pilot scale was developed: it is composed of two boxes of about 1.60 × 2 m² and 2 m high together with an external weather station. The rooms, identical in terms of size, construction materials, and orientation, are equipped with a two-wing window in the south wall surface: the first one has a standard glazing solution (double glazing with air in interspace), the second room is equipped with the innovative double-glazing system with aerogel. The indoor mean air temperature and the surface temperature of the glass panes were monitored together with the illuminance data for the lighting characterization. Finally, a brief energy characterization of the performance of the material was carried out by means of dynamic simulation models when the proposed solution is applied to real case studies.

• Journal of the Korean Wood Science and Technology
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• 제44권5호
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• pp.743-749
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• 2016

균일한 품질의 방부처리 목재 생산을 위해서는 방부약액의 농도관리가 필요하다. 아직까지 목재방부처리 현장에서 농도관리를 위하여 간편하게 방부약액의 농도를 측정할 수 있는 방법은 개발되어 있지 않다. 본 연구에서는 ACQ 목재방부제를 대상으로 비교적 손쉽게 측정할 수 있는 탁도를 이용하여 농도를 예측할 수 있는 방법을 검토하였다. 탁도가 현저하게 작은 알칼리성의 ACQ 약액에 20%의 인산 용액을 첨가하면 백색의 현탁 물질이 생성되며 탁도가 증가한다. 인산 용액의 최적 첨가량은 약액의 탁도가 최고치에 도달하는 pH 7 수준이며, 첨가량이 많아지면 약액의 산성화와 함께 탁도가 급격하게 떨어지고 약액은 투명해진다. ACQ 약액의 농도와 탁도 간에는 정(正)의 상관을 가지며 고도의 유의성이 인정되었다. 농도와 탁도로부터 유도된 회귀방정식을 사용하여 산출한 현장 채취 약액의 예측 농도 값과 적정법으로 측정한 실측 농도 값 간의 농도 차이에는 t 검정 결과, 유의성이 인정되지 않았다. 따라서 탁도와 회귀방정식을 이용하여 ACQ 현장 약액의 농도 관리가 가능할 것으로 예상된다.

• 한국결정성장학회지
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• 제23권4호
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• pp.180-188
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• 2013

삼척도계지역의 탄광에서 석탄채굴시에 부산물로 발생되는 사암계 석탄폐석을 원료로 사용하여 E-glass fiber 조성의 유리를 제조하였다. 본 연구에서는 카본함량이 비교적 적은 실리카-알루미나질의 사암계 석탄폐석을 사용하였으며, 폐석의 투입량을 0~35 %까지 변화시켰다. 서로 다른 석탄폐석 투입량을 갖는 배치원료를 $1550^{\circ}C$에서 2시간 용융하여 E-glass조성을 갖는 투명하고 맑은 유리가 얻어졌고, 81~84 %의 높은 가시광투과율, $5.39{\sim}5.61{\times}10^{-6}/^{\circ}C$의 열팽창계수, 851~$860^{\circ}C$의 연화점을 나타내었다. 유리섬유 시편은 $1150^{\circ}C$에서 섬유인상장치를 통해 얻어졌고, 복합재료의 보강용 유리섬유로서 내화학성 시험과 기계적 특성평가를 위한 인장강도를 측정하였다. 그 결과 석탄폐석을 사용한 E-glass fiber의 특성이 석탄폐석을 사용하지 않은 보통 E-glass 섬유에 비해 충분히 양호한 특성을 나타내어 E-glass 섬유용 원료로서 석탄폐석의 활용가능성을 확인할 수 있었다.

• 한국세라믹학회지
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• 제39권10호
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• pp.935-942
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• 2002

Ga 첨가된 ZnO(GZO) 박막을 5.7 wt%의 $Ga_2O_3$를 ZnO에 첨가된 세라믹 GZO 타켓을 사용하여 직류 마그넷 스퍼터에 의해 실온의 유리 기판위에 제작했다. 각각 질량이 서로 다른 Ne, Ar, Kr 가스의 다양한 전압(total gas pressure)에서 제작한 GZO 박막에 대하여, 타켓의 에로젼 영역(B영역)과 비에로젼 영역(A영역)에 대향하는 박막 영역의 전기적 특성을 조사했다. 가스 종류와 관계없이 B 영역의 대향부분은 비에로젼 영역과 비교해서, 홀 이동도와 캐리어 밀도의 감소에 의해 상대적으로 높은 비저항값을 보였다. Ne 가스를 사용한 경우, GZO 박막은 가장 높은 비저항값을 나타낸 반면, Kr 가스를 사용하여 제작한 GZO 박막은 상대적으로 가장 낮은 비저항값을 보였다. GZO 박막의 전기적 특성은 박막의 결정성에 크게 의존하고 있음을 알았으며 박막의 전기적 특성과 결정성의 저하를 일으키는 인자로서 성장중의 박막의 결정성에 크게 의존하고 있음을 알았으며 박막의 전기적 특성과 결정성의 저하를 일으키는 인자로서 성장중의 박막표면에 충돌하여 박막에 손상을 입히는 고에너지 입자를 들 수 있다. Ne, Ar, Kr 가스의 반사 중성 원자들의 에너지를 Monete Carlo simulation에 의한 계산한 결과는 실험 결과와 잘 일치함을 알 수 있었다.

• 한국실내디자인학회논문집
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• 제12호
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• pp.57-66
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• 1997

This study was carried out to find out some similarities and differences of the ornamental technique and motifs in folk furniture between Denmark and Korea which had quite different background of development of folk furniture as one of a cross-cultural study. Furniture made and used in the 18th and 19th century was investigated in order to eliminate the influence of internationalism in the design area in the 20th century. This study was fulfilled by many study trips all over the districts in Denmark to identify Danish folk furniture as well as literature study. Study trips to folk museums. Insa-dong, Janghanpyung furniture market were done for Korean folk furniture. Characteristics of ornament in Danish folk furniture were as followings; Main materials of the Danish folk furniture were conifers, especially pine tree, as pine was very common and easy to get from their surroundings. The most popular and unique types of decoration in Danish folk furniture was painting. Colors used in painted furniture were very bright and vivid. This might be a reaction to the long and dark winter of Scandinavian countries. Motifs used in Danish folk furniture had been chosen to reflect their surroundings. Flowers, six-angular stars, animals, human figures and Biblical motifs were popular sources of decoration for Danish folk furniture. Characteristics of Korean folk furniture were as followings; Main materials of Korean folk furniture were broad-leaved trees as well as conifers, because of their beautiful wood grain. The Korean ways of decoration were different from Danish ones. The method of painting with bright from Danish ones. The method of painting with bright colors was hardly ever used in Korea, except only in lacquering. The most popular decoration method for Korean folk furniture was revealing the natural wood grain with transparent vegetable oil finish, instead of painting. Metal ornament was unique to Korean folk furniture. therefore a lot of metal ornaments were attached on the furniture. Motifs used in Korean folk furniture were more like symbolic than Danish ones. Korean people tried to express their longings and norms through the motifs, such as longevity, prosperity, good luck, and many sons, etc. Therefore, it was natural for Korean motifs to have special symbolic meanings.

• 한국작물학회지
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• 제46권2호
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• pp.150-156
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• 2001

To explore the feasibility of recycled paper mulching in spring-grown potato the changes of soil environments and the growth and yield of potato under non-mulched control and three mulching treatments of recycled paper (RPM), transparent polyethylene film (TPFM), and black polyethylene film (BPFM) were examined over two spring seasons in 1998 and 1999 at Suwon, Korea. The mulching materials were a recycled mulch paper with 110 g/$m^2$ and a thickness of 0.1mm, which was manufactured from old corrugated containers for this experiment and the commercial polyethylene films with a thickness of 0.01mm. RPM lowered the average soil temperature at 5-cm depth during the potato growing period by 03$^{\circ}C$ compared with the control, whereas TPFM and BPFM raised it by 2.$0^{\circ}C$, and 1.8$^{\circ}C$, respectively. On a sunny day during sprout emergence, RPM reduced the maximum soil temperature by about 5$^{\circ}C$, while TPFM and BPFM enhanced it by about 11$^{\circ}C$ and 6.$0^{\circ}C$, respectively. The temperature difference between the control and the mulching treatments decreased with the development of canopy. All the mulching treatments had an advantage in preserving the soil moisture over the control. RPM and BPFM resulted in the effective control of weed by obstructing light transmission onto soil surface, but TPFM had no control effect of weed. Sprout emergence started two to three days earlier in TPFM and BPFM, but one day later in RPM than in the control due to the altered soil temperature by the mulching treatments. However, the final percentage of emergence was notably lower in TPFM than that in the control because of too high soil temperature during daytime, but was not different among the control, RPM, and BPFM. During the early stage of potato growth, the shoot and root growth under RPM was lower compared with the control, but afterwards, RPM outpaced the control. In 1998 experiment, the tuber yield under RPM and BPFM were significantly higher than those of the control and TPFM. In 1999 experiment, there was no significant difference in tuber yield between RPM and the control.

• 한국의류학회지
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• 제40권5호
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• pp.830-843
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• 2016

The world wide increase of obesity and demands for various plus-size fashion are expanding the global plus-size fashion market. This study is to understand the market status of the US (the biggest plus-size fashion market) as well as analyze women's fashion shown in power blogs on the plus-size fashion trend. For research methods, photos from the top 10 globally ranked plus-size power blogs on Alexa.com were collected and divided into 5 plus-size body types based on: design factors, style, color, item, and texture. Pants with tops or completed outfits including pants, tops, and outer were the most common for casual styles; in addition, a tendency to pursue comfortable and naturally fitted clothes was also indicated. As for colors, the most common were blue colors and white or pastel toned colors; in addition, soft, hard, and transparent were all evenly used for materials. One-piece items were the most popular formal style that were mostly a one-tone color made with hard materials indicated by the pursuit of the fanciness and formality of a dress for a formal occasion. Black was the most common color, and the color variation was less diverse compared to that of casual styles. The most common for semi-formal styles were outfits with movability and more fanciness such as wearing a casual outer on top of a formal one-piece. When examining the fashion in plus-size blogs, there are differences in the frequency of design factors due to the diversity of body-types; in addition, different items were shown to be preferred in accordance with styles. The results of this study will help fashion companies who want to enter the global plus-size women's fashion market (including the US market); in addition, research on plus-size fashion that is changing the fashion and aesthetic paradigm is expected to contribute to academia.

• 유통과학연구
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• 제8권3호
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• pp.5-15
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• 2010

Business corporations have become specialized and on the basis of various interests try to strengthen their competitiveness through a cooperative system of purchase, distribution, service and IT technology. And an advanced Internet-based electronic commerce has witnessed explosive growth and a business-to-business (B2B) electronic commerce. Through E-marketplace. business corporations achieve such diverse utilities as expenditure curtailment, process reduction and prime cost reduction. And with business depression worldwide and soaring prices of materials, many business corporations consider the introduction of comprehensive purchase of MRO (maintenance, repair and operation) materials. The Purpose of this study was to examine the definition of B2B E-marketplace and the utilities of MRO commerce correctly focusing on an empirical analysis of cases of MRO supply and purchase business corporations. The indications acquired from this research results are as follows. Firstly, as for MRO integrated purchase under the characteristics of the market environment, it had to use the supplier obligatorily through the integrated purchase on the level of CEO's decision-making or the group rather than the voluntary will of the purchasing department or the procurement department. Secondly, as for the present B2B E-marketplace MRO purchase, the purchasing agency business has formed the mainstream, but it is aiming at the diversification of the benefit by supplementing/correcting the business model such as category type, mediation business type, MRO-type advancing in the store inclusive of the purchasing agency business, keeping pace with the potential market of MRO. Thirdly, as for analysis of the products, the purchaser wants more various products and assortment of goods than those of the present time, and also to be provided with the precise product information. Especially, as the importance of the product sourcing becomes high, the whole energy has been bestowed on acquirement of the excellent suppliers. Fourth, as for use of B2B E-marketplace MRO integrated purchasing system, there are the purchasing companies complaining the inconvenience even until now, and there is the demerit spending the long time during the image move and the process treatment. It shall try to shorten the searching time and the process treatment time as the system is centered on the purchaser. In order to enhance the efficiency of MRO E-marketplace purchase, followings must be considered: First, because the importance of product sources ever increases, an excellent supplier must be secured earnestly. Second, the time of process must be reduced focusing on purchasers. B2B E-marketplace will increase and diversify electronic commerce continuously. Through MRO E-marketplace, business corporations will reduce expenditure, achieve a transparent and speedy trade, and purchase products of fine quality, thus establishing a most effective market. In addition, in this study the investigator brings focus into MRO which has not been clearly discussed in the academic and business world so far and intensively highlights an indirect material-oriented expenditure curtailment effect. By taking all the aspects of supplier, purchaser and practical economical value into account, the investigator presents a strategic direction for the successful comprehensive purchase of B2B MRO.

• 한국산업보건학회지
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• 제7권2호
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• pp.209-222
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• 1997

Authors surveyed the ground water near the waste disposed from a fiberglass production factory to confirm the presence of glassfiber in the water and to determine the effect of sampling conditions and storage on the recovery of fibrous materials in the ground water. Sample was collected at every 4 hours for 48 hours consecutively. After finishing the 48 hours sample, water sampling was done from each tap after repeated turning on and off the water for 30 seconds at each time. Sample was collected in the two 1.5 liter polyethylene bottle after vigorously shaking the bottle with the same water several times with the flowing tap water. At each paired sample, one bottle was stored stand still at room temperature, and the other sample was filtered immediately after sampling. Water was filtered on the Mixed Cellulose Ester filter with negative pressure. Each sample was divided into upper and lower layer. The other bottle was stored at room temperature standstill for 7 days and filtered in the same fashion as the other pair of sample did. Each MCE filter was divided into 4 pieces and one piece was treated with acetone to make it transparent. Each prepared sample was observed by two researchers under the light and polarizing microscopy, scanning electron microscopy and energy dispersive X-ra microanalysis. Fibers were classified by the morphology and polarizing pattern under the polarizing microscope, and count was done. 1. There was a significant fluctuation in number of the fibers, but there was no specific demonstrable pattern. 2. Non-polarizing fibers frequently disappeared after 7 days's storage. But cluster of fibers were found at the wall of the same container by scratching technique. 3. Polarizing fibers were usually found in between the filter and the manicure pasted area. Possible explanations for this phenomenon will be that either these fibers are very light or have electronic polarity. Hence, these fibers are not able to be attached on the surface of slide glass. 4. Under the scanning electron microscopic examination, the fibers which are not refractive under the light microscopy were identified as glassfiber. Other fibers which is refractive under the polarizing microscopy were identified as magnesium silicate fibers. It is strongly suggested that development of standardized method of sample collection and measurement of fibrous material in the water is needed.