• Title/Summary/Keyword: screening technique

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First-Order Sensitivities for FACTS Devices using UPFC Ideal Transformer Model (UPFC 이상변압기 모델을 사용한 유연송전장치 일차민감도 해석)

  • Thomas W. Gedra;Seung-Won An
    • Journal of Advanced Marine Engineering and Technology
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    • v.28 no.5
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    • pp.837-846
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    • 2004
  • This paper presents a screening technique for greatly reducing the computation involved in determining the optimal location and types of Flexible AC Transmission System (FACTS) devices in a large power system. The first-order sensitivities of the generation cost for various FACTS devices are derived. This technique requires solving only one optimal power flow (OPF) to obtain sensitivities with respect to FACTS device control variables for every transmission line To implement a sensitivity-based screening technique, we used a new UPFC model, which consists of an ideal transformer with a complex turns ratio and a variable shunt admittance. A S-bus system based on the IEEE 14-bus system was used to illustrate the technique.

Effect of a Training Programme on Knowledge of Nurses from a Missionary Hospital in India Regarding Breast Cancer and its Screening

  • Khokhar, Anita
    • Asian Pacific Journal of Cancer Prevention
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    • v.13 no.12
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    • pp.5985-5987
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    • 2012
  • A cross-sectional study was conducted among nursing staff of a missionary hospital of Delhi in June 2009. All the nurses were invited to participate in the training programme on breast cancer and techniques of breast self examination (BSE). A questionnaire was administered to all 259 participants seeking information on their level of awareness regarding breast cancer and relevant screening guidelines. With the help of 5 training workshops all the nurses were imparted training regarding the most appropriate technique of doing breast self exams. The mean age of the participants was 35.8 years. Out of a total of 259 nursing staff members 77.2% correctly answered all the 10 questions regarding high risk factors for breast cancer and after the training programme this increased to 100% (p<0.05). Only 65.2% of the participants gave correct responses to all the 8 questions regarding correct technique of performing a BSE, which after the training programme increased to 99.3% (p<0.05). At the baseline only 56.8% knew all the three screening methods correctly and after the intervention 98.7% could correctly mark the responses regarding screening (p<0.05). The actual practice of following the screening guidelines amongst the nursing staff was poor. Only 26 (10.03%) had ever done a BSE, none performed it monthly, 58 (22.4%) had ever gone themselves for a CBE and 18 (6. 94%) had ever undergone mammography.

Screening for Resistance to Purple Seed Stain 'Cercospora kikuchii' by Seed Inoculation Technique. (종자접종법에 의한 대두 자반병 저항성 검정에 관한 연구)

  • Shin-Han Kwon;Jeong-Hae Oh
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.23 no.2
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    • pp.113-117
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    • 1978
  • An attempt was made to establish a mass-screening technique for resistance to purple seed stain .disease in soybean. Seeds sterilized in 1 : 10000 'mercuric chloride for 1 minute and transffered to Petridishes containing 20ml water agar plus 50ppm of the sodium salt of 2,4-D were inoculated by placing a small agar cube containing fungal mycelium on the seed coat of each seed. A positive correlation between natural infection of purple seed :stain and purple discoloration by seed inoculation technique was highly significant and by this technique, some native soybean collections and introduced varieties were tested for resistance to the disease. Most of the soybean varieties tested were susceptible except for the varieties Hill, Harosoy and Sac, resistant comparatively.

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Pre-screening technique for MT and GDS data processing based on the spectral power of Electromagnetic field (전자기장의 분광 에너지에 기반한 MT 및 GDS 자료의 전처리 기법 연구)

  • Yang, Jun-Mo;Kwon, Byung-Doo
    • 한국지구물리탐사학회:학술대회논문집
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    • 2006.06a
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    • pp.253-258
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    • 2006
  • The Korean peninsula has been known to be very difficult to acquire clean MT and GDS data due to its highly industrialization and civilization. In this environment, a pre-screening step selecting data segments with a proper S/N ration is an essential one. This study modified the automatic pre-screening step based on the spectral power of electromagnetic field (RMP) taking account of the situation of the Korean Peninsula. The modified RMP technique was applied to MT data measured at seven sites located in middle part of the peninsula. In the whole sense, the RMP technique considerably improved the connectivity of apparent resistivity and phase curves around the period of 10 sec. In addition, the results processed by the RMP technique showed a very little difference with those derived from manual editing, and the superior performance of it is found especially in the connectivity of apparent resistivity curve.

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On-line Trace Enrichment for the Determination of Insulin in Biological Samples Using Reversed-Phase High Performance Liquid Chromatography with Column Switching

  • Lee, Jung-Sook;Lee, Heeyong;Lee, Hye-Suk;Lee, Kang-Choon
    • Archives of Pharmacal Research
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    • v.17 no.5
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    • pp.360-363
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    • 1994
  • Column--swtiching technique with a reversed-phase high performance liquid chromatographic method has been developed for the routine analysis of radioiodinated insulin and its degadation products in biological fluids. The diluted biological samples were loaded onto a precolumn packed with LiChrosorb RP-8 $(25-40{\;}{\mu}m)$ using 0.1% trifuoroacetic acid (TFA) in water as a washing solvent. After valve switching, the concentrated insulins were eluted in the back-flush mode and separated by a W-Porex $C_{18}$ column with a gradient of 0.1% TFA in water and 0.1% TFA in acetonitrile as the mobile phase. The method showed good precision, accuracy and speed with the detection limit of 20 pg/ml. Total analysis time per sample was about 40 min and the coefficients of variation were less than 8, 2%.

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Electrical Impedance Tomography as a Primary Screening Technique for Breast Cancer Detection

  • Akhtari-Zavare, Mehrnoosh;Latiff, Latiffah A
    • Asian Pacific Journal of Cancer Prevention
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    • v.16 no.14
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    • pp.5595-5597
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    • 2015
  • Electrical impedance tomography (EIT) is a new non-invasive, mobile screening method which does not use ionizing radiation to the human breast. It is based on the theory that cancer cells display altered local dielectric properties, thus demonstrating measurably higher conductivity values. This article reviews the utilisation of EIT in breast cancer detection. It could be used as an adjunct to mammography and ultrasonography for breast cancer screening.

Screening of Rayleigh Waves by Composite Barriers (복합방진벽에 의한 Rayleigh파의 차단)

  • 이종세
    • Proceedings of the Earthquake Engineering Society of Korea Conference
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    • 1997.10a
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    • pp.133-140
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    • 1997
  • Based on the Green's function technique, an analytical approach is developed to examine the surface wave screening effectiveness of composite wave barriers. The composite barrier consists of a high velocity layer sandwiched between two thin layers of low shear velocity materials. The high velocity layer is represented by differential matrix operators which relate the wave fields on each side of the layer. The low velocity layers are modeled by non-rigid contact conditions which allow partial sliding at the interfaces. Screening ratio of barriers with various combination of material, geometric, and non-rigidness parameters are compared and discussed in some detail.

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An innovative vibration barrier by intermittent geofoam - A numerical study

  • Majumder, Mainak;Ghosh, Priyanka;Sathiyamoorthy, Rajesh
    • Geomechanics and Engineering
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    • v.13 no.2
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    • pp.269-284
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    • 2017
  • A new technique is proposed to obtain more effective screening efficiency against the ground vibration using intermittent geofoam (IF) in-filled trench. The numerical analysis is performed by employing two-dimensional finite element method under dynamic condition. Vertically oscillated strip foundation is considered as the vibration source. In presence of the ground vibration, the vertical displacements at different locations (pick-up points) along the ground surface are captured to determine the amplitude reduction factor (ARF), which helps to assess the efficiency of the vibration screening technique. The efficiency of IF over continuous geofoam (CF) in-filled vibration barriers is assessed by varying the geofoam density, the location of trench and the frequency of excitation. The results from this study indicate that a significant reduction in ARF can be achieved by using intermittent geofoam as compared to continuous geofoam. Further, it is noticed that the efficiency of IF increases with an increase in the frequency of the vibrating source. These encouraging results put forward the potential of utilising intermittent geofoam as a vibration screening material.

Atom Number and Bounding Sphere Based Search Speedup Technique for Similar Proteins Screening (원자개수와 경계구에 기반한 유사 단백질 스크리닝을 위한 검색 가속 기법)

  • Lee, Jaeho;Park, JoonYoung
    • Korean Journal of Computational Design and Engineering
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    • v.20 no.4
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    • pp.321-327
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    • 2015
  • In the protein database search, 3D structural shape comparison for protein screening plays a important role. Protein databases have big size and have been grown rapidly. Exhaustive search methods cannot provide a satisfactory performance. As protein is composed of a set of spheres, the similarity calculation of two set of spheres is very expensive. Thus, a reasonable filtering method could be an answer for the speedup of protein screening. In this paper, we suggest a speedup method for protein screening with atom number and bounding sphere. We also show some experimental results for the validity of our method.

Comparison of Cervical Cell Morphology Using Two Different Cytology Techniques for Early Detection of Pre-Cancerous Lesions

  • Moosa, Najla Yussuf;Khattak, Nuzhat;Alam, Muhammad Irfan;Sher, Alam;Shah, Walayat;Mobashar, Shumaila;Alam, Muhammad Imran;Javid, Asima
    • Asian Pacific Journal of Cancer Prevention
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    • v.15 no.2
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    • pp.975-981
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    • 2014
  • Cervical cancer is an issue of foremost importance globally, specifically affecting the developing nations. Significant advances have taken place with regard to diagnosis of cervical cancer, especially with screening. Appropriate screening measures can thus reduce the incidence of cervical cancer. The most desirable screening technique should be less invasive, easy to perform, cost-effective and cover a wide range of diagnostic icons. Manual liquid based cytology (MLBC) can be considered as one of the suitable technique for screening with the above-mentioned benefits. The aim of the current study was to compare two cervical screening techniques on the basis of different morphological parameters and staining parameters by using modified acetic acid Pap staining to see the possibility of reducing time economy involved in conventional Pap staining (CPS). The study was conducted on a total 88 cases and all were analyzed with both MLBC and CPS. Forty eight cases that were regarded as satisfactory on the basis of Bethesda system by both methods were further recruited for investigation. Their morphological parameters and staining quality were compared and scored according to a scoring system defined in the study. Quality indices was calculated for both staining procedures and smear techniques.