• 제목/요약/키워드: M-way below

검색결과 68건 처리시간 0.026초

Classifying Forest Species Using Hyperspectral Data in Balah Forest Reserve, Kelantan, Peninsular Malaysia

  • Zain, Ruhasmizan Mat;Ismail, Mohd Hasmadi;Zaki, Pakhriazad Hassan
    • Journal of Forest and Environmental Science
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    • 제29권2호
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    • pp.131-137
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    • 2013
  • This study attempts to classify forest species using hyperspectral data for supporting resources management. The primary dataset used was AISA sensor. The sensor was mounted onboard the NOMAD GAF-27 aircraft at 2,000 m altitude creating a 2 m spatial resolution on the ground. Pre-processing was carried out with CALIGEO software, which automatically corrects for both geometric and radiometric distortions of the raw image data. The radiance data set was then converted to at-sensor reflectance derived from the FODIS sensor. Spectral Angle Mapper (SAM) technique was used for image classification. The spectra libraries for tree species were established after confirming the appropriate match between field spectra and pixel spectra. Results showed that the highest spectral signature in NIR range were Kembang Semangkok (Scaphium macropodum), followed by Meranti Sarang Punai (Shorea parvifolia) and Chengal (Neobalanocarpus hemii). Meanwhile, the lowest spectral response were Kasai (Pometia pinnata), Kelat (Eugenia spp.) and Merawan (Hopea beccariana), respectively. The overall accuracy obtained was 79%. Although the accuracy of SAM techniques is below the expectation level, SAM classifier was able to classify tropical tree species. In future it is believe that the most effective way of ground data collection is to use the ground object that has the strongest response to sensor for more significant tree signatures.

여수해만의 어장학적 특성 - 정치망 어장을 중심으로 - (The Characteristics of a Fishing Ground at Yeosu Bay - Pound Net Fishing Ground -)

  • 김동수
    • 수산해양기술연구
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    • 제25권2호
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    • pp.44-53
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    • 1989
  • 여수해만의 어장학적 특성을 구명하기 위하여 정치망 어장에서의 해황과 어획율의 변동을 조사한 결과를 요약하면 다음과 같다. 1. 수온의 분포는 봄과 여름에 연안쪽에 높고 외해쪽이 낮았으며, 가을과 겨울에는 그 반대였다. 2. 염분의 분포는 봄과 겨울에 높고 여름과 가을에 낮았으며, 돌산연안에 저염분대가 형성되고 외해에는 고염분대가 형성되었다. 3. 돌산연안쪽 어장에서는 와류현상이 일어났고 여름철에는 수심 30~40m 사이에 수온약층 및 염분약층이 형성되었으며 가을과 겨울에는 거의 균등한 해수가 전해역에 분포하였다. 4. 정치망 어획량의 년변화는 1984년에 최대를 기록하였고 그 이후부터는 감소하였으며, 월별어획량의 변화는 6월에 최대치를 보였고 그 이후부터는 감소해가는 경향이었다. 5. 수온과 염분이 증가함에 따라 어획량은 증가하는 경향이었으며, 수온 21$^{\circ}C$~27$^{\circ}C$, 염분 32.80%~34.00%에서 가장 많이 어획되었다. 6. 어군의 전체조성비는 삼치 28.4%, 멸치 18.0%, 전갱이 19.5%, 정어리 21%, 갈치 7.2%, 고등어 1%, 방어 0.8%이고 꽁치, 게, 오징어는 0.7%이하였다. 7. 어종별 어획시기는 삼치, 갈치, 방어, 게등이 조업기간중 계속 어획되었으며 멸치와 정어리가 4~8월, 전갱이와 고등어가 5~11월, 쥐치, 꽁치, 복어는 4~10월, 오징어가 4~9월에 많이 어획되었다. 8. 어획량이 가장 많았던 6월과 8월에는 풍향이 주로 NE, SSW이고, 풍속은 2.9m/sec 미만이고, 1.008mb이하의 저기압성이었으며, 강수량이 가장 많았었다.

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교사환경기준에 관한 연구 (A Study on Environmental Standards of School Building)

  • 홍석표;박영수
    • 한국학교ㆍ지역보건교육학회지
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    • 제1권1호
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    • pp.11-43
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    • 2000
  • The purpose of this study was, through analyzing the previous researches, to grasp the present status of environment of school building(ESB), research the sundry records of each element and, through comparative analysis of the standard of ESB in Korea, the United States, and Japan, select the normative standard of ESB, to clarify the point at issue presented in Regulation of Construction & facility Management for Elementary and and Secondary School in Korea, and to suggest an alternative preliminary standard of ESB. To carry out a research for this purpose, these were required: 1. to investigate the existing present status of ESB, 2. to make a comparative analysis of the standard of ESB in each country, 3. to suggest the normative standard of preliminary standard of ESB, 4. to analyze the controversial points of the standard of ESB in Korea, 5. to suggest an alternative preliminary standard of ESB. The conclusions were as follows: 1. Putting, through analyzing the previous researches, the existing present status of ESB together, it seemed that lighting environment, indoor air environment and noise environment were all in poor conditions. 2. In the result of a comparative analysis of the standard of ESB in Korea, Japan and the United States, in Korea the factors of each lighting and indoor air environment were not presented properly, in Japan, in lighting environment aspect, the standard on natural lighting and the factors on brightness were not presented., and in the USA the essential factors of each environment were throughly presented. In the comparison of the standards on each factor, Korea showed that the standard level presented was less properly prescribed than those of the USA and Japan but it also showed that the standard levels prescribed in the USA and in Japan were mostly similar to the standard levels in records investigated. 3. With the result of the normative standard selection on School Builiding environment factor of prescribed in this study, the controversial points of the standard of ESB in Korea were analyzed and the result was utilized to suggest new preliminary standard of ESB. 4. As the result of the analysis of the controversial points of the standard of ESB in Korea, it was found that the standard of ESB in Korea should be established on a basis of School Health Act and be concretely presented in School Health Regulation and School Health Rule. The factors of each environment was improperly presented in the existing standard of ESB in Korea. Moreover the standard of them was inferior to that of the records investigated and those of in the USA and in Japan and it also showed that the standard of it in Korea was improper to maintain Comfortable Learning Environment. 5. A suggested preliminary standard of ESB acquired through above study as follows: 1) In this study a new kind of preliminary standard of ESB is divided into lighting environment, indoor air environment, noise environment, odor environment and for above classification, reasonable factor and standard should be established and the controling way on each standard and countermeasures against it should be considered. 2) In lighting environment, the factors of natural lighting are divided into daylight rate, brightness, glare. In the standard on each factor, daylight rate should secure 5% of a mean daylight rate and 2% of a minimum daylight rate, brightness ratio of maximum illumination to minimum illumination should be under 10:1, and in glare there should not be an occurrence factor from a reflector outside of the classroom. And the factors of unnatural lighting are illumination, brightness, and glare. In the standard on each factor, illumination should be 750 lux or more, brightness ratio should be under 3 to 1, and glare should not occur. And Optimal reflection rate(%) of Colors and Facilities of Classroom which influences lighting environment should be considered. 3) In indoor air environment factors, thermal factors are divided into (1) room temperature, (2) relative humidity, (3) room air movement, (4) radiation heat, and harmful gases (5) CO, (6) $CO_2$ that are proceeded from using the heating fuel such as oval briquettes, firewood, charcoal being used in most of the classroom, and finally (7) dust. In the standard on each factor, the next are necessary; room temperature: $16^{\circ}C{\sim}26^{\circ}C$(summer : $E.T18.9{\sim}23.8^{\circ}C$, winter: $E.T16.7{\sim}21.7^{\circ}C$), relative humidity: $30{\sim}80%$, room air movement: under 0.5m/sec, radiation heat: under $5^{\circ}C$ gap between dry-bulb temperature and wet-bulb temperature, below 1000 ppm of ca and below 10ppm of $CO_2$, dust: below 0.10 $mg/m^3$ of Volume of dust in indoor air, and ventilation standard($CO_2$) for purification of indoor air : once/6 min.(about 7 times/40 min.) in an airtight classroom. 4) In the standard on noise environment, noise level should be under 40 dB(A) and the noise measuring way and the countermeasures against it should be considered. 5) In the standard on odor environment, odor level under Physical Method should be under 2 degrees, and the inspecting way and the countermeasures against it should be considered.

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PERFORMANCE TEST FOR A PDS MICRODENSITOMETER MODEL 1010GMS

  • Hong, S.S.;Paek, W.G.;Lee, S.G.
    • 천문학회지
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    • 제25권1호
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    • pp.23-46
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    • 1992
  • The electrical, mechanical and optical capabilities have been tested of the microdensitometer PDS 1010GMS at the Korea Astronomy Observatory. The highest stage of scan speed 255 csu (conventional speed unit) is measured to be 47 mm/s. At this speed the position is displaced by $4{\mu}m$ to the direction of scanning and the density is underestimated by $0.4{\sim}0.7D$. Standard deviation in the measured density is proportional to $A^{-0.46}$, where A is the area of scan aperture. The accuracy of position repeatability is ${\pm}1{\mu}m$, and that of density repeatability is ${\pm}(0.003{\sim}0.03)D$. Callier coefficient is determined to be 1.37; the semispecular density is directly proportional to the diffuse density up to 3.5D. Because the logarithmic amplifier has a finite response time, the densities measured at high scan speeds are underestimated to the degree that speeds higher than 200 csu are inadequate for making an accurate astronomical photometry. After power is on, an about 5 hour period of warming is required to stabilize the system electrically and mechanically as well. On the basis of this performance test, we have determined the followings as the optimum scan parameters for the astronomical photometry: For the scan aperture $10\;\sim\;20{\mu}m$ is optimal, and for the scan speed. $20\;{\sim}\;50$ csu is appropriate. These parameter values are chosen in such a way that they may keep the density repeatability within ${\pm}0.01D$, the position displacement under $1{\mu}m$, and the density underestimation below 0.1D even in high density regions.

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칩과 안테나 사이 연결부 보호를 위한 RFID 태그 안테나의 광대역 설계 (Wide Bandwidth RFID Tag Antenna Design for Protection of Connection Part between Chip and Antenna)

  • 이지철;민경식
    • 한국전자파학회논문지
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    • 제20권2호
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    • pp.154-160
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    • 2009
  • 본 논문은 칩과 안테나 사이의 연결부 보호를 위한 RFID 태그 안테나의 광대역 설계에 대해서 기술한다. 제안된 태그 안테나의 크기, 공진 주파수 그리고 대역폭은 각각 $53{\times}10{\times}1\;mm$, 900 MHz이고, -10 dB 이하에서 800 MHz($500{\sim}1,200\;MHz$)이다. 폴리에틸렌, 유리 그리고 실리콘과 같은 다른 비유전율을 가지는 유전체 매질들이 제안된 안테나와 칩의 연결부 보호를 위해 전체 하우징과 부분 하우징으로 적용되었다. 측정된 반사 손실과 방사 패턴은 계산 결과와 비교하여 잘 일치하였다. 하우징을 하지 않은 제안된 태그 안테나의 인식거리와 3 mm 두께를 가진 실리콘에 의해 전체적으로 하우징된 태그 안테나의 인식거리는 각각 약 5 m와 4 m로 관측되었다.

Effects of Heavy Metal Contamination from an Abandoned Mine on Tomato Growth and Root-knot Nematode Development

  • Park, Byeong-Yong;Lee, Jae-Kook;Ro, Hee-Myong;Kim, Young-Ho
    • The Plant Pathology Journal
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    • 제27권3호
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    • pp.266-271
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    • 2011
  • Physicochemical characteristics and heavy metal content of soils located along the drainage way of an abandoned mine at Busan, Korea ($35^{\circ}31'N$, $129^{\circ}22'E$) (contaminated soil; CS) and uncontaminated soils (50-70 m apart from the drainage way) (NS) were examined. Growth of tomato plants (Solanum lycopersicom cv. Rutgers) in CS and NS, development of the root-knot nematode (Meloidogyne incognita) as root-knot gall formation on tomato plants, and non-parasitic nematode populations in soil were also examined. Growth of tomato plants, root-knot gall formation, and non-parasitic nematode populations were significantly reduced in CS with higher As content, lower pH, higher electrical conductivity (EC), and lower available phosphate (av. $P_2O_5$) than in NS. None of the other physicochemical characters examined differed significantly between CS and NS (low and no significance) and were above or below the critical levels detrimental to plant growth and nematode development, suggesting that As may be the primary hazardous heavy metal in CS. The toxicity of As might be enhanced at low pH in CS because exchangeable forms of some heavy metals increase with the decrease of soil pH. The heavy metals, especially As, may have contributed to increasing EC and decreasing av. $P_2O_5$. Therefore, the effects of mine drainage contamination from the abandoned mine were derived primarily from contamination by heavy metals such as As. These may have been enhanced in toxicity (solubility) by the lowered pH, increased soil salinity (EC) and decreased av. $P_2O_5$. Our results suggest synergistic adverse effects on the plant and the nematode by decreasing osmotic potential and nutrient availability.

Inductive Micro Displacement Detecting System with High Sensitivity and Low Linearity Error

  • Park, Dong-June;Park, In-Mook;Kim, Soo-Hyun
    • International Journal of Precision Engineering and Manufacturing
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    • 제2권3호
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    • pp.54-60
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    • 2001
  • A newly designed inductive micro displacement detecting system is presented. The proposed inductive system consists of driving coils, position-detecting coils, cores, and closed-loop formed magnetic blocks. The cores and magnetic blocks are made of Mn-Zn ferrite. When AC sine wave is applied to the driving coils, the time derivative flux is generated within the system, and then induced voltages arise in the position-detecting coils according to the core\`s position. Putting the cores to be moved proportionally to the input displacement, the induced voltage is proportional to input displacement. The parameters that affect the system characteristics are turn ratio, air-gap size, excitation frequency, overlap area, load resistance, capacitance effect, and so forth. Based on the experimental results, the system parameters are selected in such a way as to have high sensitivity ad stable responses. The sensitivity of the proposed inductive displacement-detecting system is greater than 2800mV.V-1mm-1 and the linearity error is below $\pm$0.10% in the range of $\pm$200㎛.

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Residual stresses measurement in the butt joint welded metals using FSW and TIG methods

  • Taheri-Behrooz, Fathollah;Aliha, Mohammad R.M.;Maroofi, Mahmood;Hadizadeh, Vahid
    • Steel and Composite Structures
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    • 제28권6호
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    • pp.759-766
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    • 2018
  • Friction Stir Welding (FSW) is a solid-state process, where the objects are joined together without reaching their melting point. It has been shown that this method is a suitable way to join dissimilar aluminium alloys. The current article employed hole drilling technique to measure the residual stress distribution experimentally in different zones of dissimilar aluminium alloys AA6061-T6 and AA7075-T6 Butt welded using FSW. Results are compared with those of similar AA6061-T6 plates joined using a conventional fusion welding method called tungsten inert gas (TIG). Also, the evolution of the residual stresses in the thickness direction was investigated, and it was found that the maximum residual stresses are below the yield strength of the material in the shoulder region. It was also revealed that the longitudinal residual stresses in the joint were much larger than the transverse residual stresses. Meanwhile, Vickers micro hardness measurements were performed in the cross-section of the samples. The largest hardness values were observed in the stir zone (SZ) adjacent to the advancing side whereas low hardness values were measured at the HAZ of both alloys and the SZ adjacent to the retreating side.

FEEDING OF BYPASS PROTEIN TO CROSS BRED COWS IN INDIA ON STRAW BASED RATION

  • Kunju, P.J.G.;Mehta, A.K.;Garg, M.R.
    • Asian-Australasian Journal of Animal Sciences
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    • 제5권1호
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    • pp.107-112
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    • 1992
  • Feeding of bypass protein to lactating animals have been suggested by many research scientists as a way to increase the nutrient supply at the intestinal level thereby enhance animal production in ruminant animals. A feeding trial with a formulated bypass protein feed on straw based ration was carried out by using lactating cross bred cows at the stage of 4th month of their lactation. Bypass protein feed was fed at 5 different levels. Urea Molasses Block was used as a nitrogen source to the rumen microflora. In order to reduce the heat increment straw intake was restricted to all the animals. Urea Molasses Block intake was noticed varying in proportion with the bypass protein feed intake. Milk production was observed increasing in accordance with the level of bypass protein feed intake. However, the maximum response was noticed in cows that were fed 3 kg bypass protein feed. The nutrient availability at this stage was below the NRC (1988) requirements. Other remarkable finding was that the cows maintained the persistency of milk production even after 3rd month of lactation when the ambient temperature was $40^{\circ}C$.

$18{\beta}$-Glycyrrhetinic Acid의 면역보조제효능에 의한 항 전신성캔디다증 효과 ($18{\beta}$-Glycyrrhetinic Acid Induces Protective Anti-Candida albicans Antibody by Its Immunoadjuvant Activity)

  • 한용문
    • 약학회지
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    • 제52권6호
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    • pp.494-499
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    • 2008
  • The role of antibody in the fungal infections is controversial. However, our previous reports showed a certain epitope in Candida albicans cell wall (CACW) induces protective antibody. A major problem is that the epitope isolation requires tremendous time with high cost. This aspect led us to investigate a simple way inducing protective antibodies against C. albicans. In the present study, we determined if $18{\beta}$-glycyrrhetinic acid ($18{\beta}$-GA) from Glabrae Radix (a family of Leguminosae) has immunoadjuvant activity. Data displayed that the $18{\beta}$-GA suppressed proliferations of both T- and Blymphocytes at high concentrations, whereas below 20 ${\mu}M$ concentration the compound supported the proliferations. These observations indicate that $18{\beta}$-GA has immunoregulatory activity. Based on this observation, an immunoadjuvant effect was examined at the low concentration. Results from animal experiments showed that CACW combined with or without $18{\beta}$-GA produced the anti-C. albicans antiserum in mice. Nevertheless, the CACW combined with $18{\beta}$-GA formula only protected mice against disseminated candidiasis (P<0.05). These data implicate that $18{\beta}$-GA has immunoadjuvant activity, which may provoke the CACW antigen to induce protective antibody. Currently, we are investigating possible mechanism of how the $18{\beta}$-GA provokes such protective immunity against the disseminated disease.