Development of the Aerosol Mass Spectrometer with Various Heater Tip Configurations to Improve Collection Efficiency of Particles

Anna Liza Bais,Laarnie Tumolva,Heesung Kwak,Kihong Park 한국대기환경학회 2010 한국대기환경학회 학술대회논문집 Vol.2010 No.5월

Calculations of the human vitamin D exposure from UV spectral measurements at three European stations

Kazantzidis, Andreas,Bais, Alkiviadis F.,Zempila, Maria Melina,Kazadzis, Stelios,Den Outer, Peter N.,Koskela, Tapani,Slaper, Harry Korean Society of Photoscience 2009 Photochemical & photobiological sciences Vol.8 No.1

The health benefits of solar UVB and vitamin D in reducing the risk of cancer and several other diseases have been well documented in recent years. In this study, quality-checked spectral UV irradiance measurements from three European stations (Jokioinen, Finland; Bilthoven, The Netherlands; and Thessaloniki, Greece) are used and the vitamin D effective dose (VDED) is calculated. The maximum average daily VDED is measured during the second half of June and it is up to 250 times higher than the corresponding winter minimum value. At each site, a polynomial fit between the VDED and the erythemal dose rates is proposed. The average VDED rates at local noon exceed a detection threshold value for the cutaneous production of vitamin D at Thessaloniki and Bilthoven throughout the year. The proposed standard vitamin dose cannot be attained, even for skin types I-III and exposure time of 60 minutes around local noon, under physiological atmospheric conditions at Bilthoven and Jokioinen during 3 and 4 months respectively. The daily VDED values, using the CIE action spectrum, are higher from 2% and 8% during summer and winter respectively at all sites, compared with those derived by the action spectrum proposed by MacLaughlin et al. (Science, 1982, 216, 1001-1003). These differences are comparable with the uncertainty of spectral measurements.

Immunocompetence Status of White Plumage Naked Neck versus Normally Feathered Broilers in Tropical Climate

Patra, B.N.,Bais, R.K.S.,Sharma, D.,Singh, B.P.,Prasad, R.B.,Bhushan, B. Asian Australasian Association of Animal Productio 2004 Animal Bioscience Vol.17 No.4

The study was undertaken to evaluate the effect of naked neck gene on mortality, cell mediated and humoral immune response in white plumage broiler population. The mortality of homozygous naked neck (Na/Na) broilers (11.71%) was comparatively lower than that of heterozygous naked neck (Na/na) (12.28%) and normally feathered (na/na) (13.59%) broilers. The humoral immune response was measured against (1% v/v) sheep red blood cells (SRBC) for total haemagglutinin (HA) antibody, 2-mercaptoethanol resistance (MER) or (IgG) antibody and 2-mercaptoethanol sensitive (MES) or (IgM) antibody titre on 7 days post-immunization. The titre was expressed as log2 of the highest dilution which shows complete haemagglutination. Total HA titers of Na/Na and Na/na (11.05$\pm$0.53 and 11.09$\pm$0.38) were comparatively higher than that of na/na (10.26$\pm$0.42). The MES antibody titre of Na/Na (8.50$\pm$0.53) and Na/na (7.63$\pm$0.45) broilers were significantly higher as compared to na/na (6.11$\pm$0.32) broilers. The MER titre of na/na genetic group (4.15$\pm$0.42) was significantly higher than Na/Na (2.55$\pm$0.37) and comparatively higher than Na/na (3.45$\pm$0.38) broilers. In vivo cell response to phytohaemagglutinin-P (PHA-P), measured as Foot Index (FI) in mm expressed significantly higher response in Na/na (0.473$\pm$0.05) and Na/Na (0.413$\pm$0.04) broilers as compared to na/na (0.304$\pm$0.03) broilers. The result of present study suggested that white plumage naked neck broilers had better immune response as compared to normally feathered broilers.

Performance of Naked Neck versus Normally Feathered Coloured Broilers for Growth, Carcass Traits and Blood Biochemical Parameters in Tropical Climate

Patra, B.N.,Bais, R.K.S.,Prasad, R.B.,Singh, B.P. Asian Australasian Association of Animal Productio 2002 Animal Bioscience Vol.15 No.12

A population segregating for the naked neck (Na) gene was used to evaluate its effect on fast growing broilers at heat stress. An experimental stock comparable to those of modern broilers was established by backcrossing to colour synthetic male and female lines. Matings between heterozygous (Na/na) males and females produced normally feathered (na/na), heterozygous (Na/na) and homozygous (Na/Na) chicks for the present study. Day old to seven week old coloured broilers of three genotypes viz. normally feathered (na/na), heterozygous naked neck (Na/na) and homozygous naked neck (Na/Na) were compared for heat dissipation, growth performance, body conformation traits, blood biochemical parameters and carcass traits in tropical climate. In hot climate, naked neck broilers had significantly less body temperature and better heat dissipation capabilities as compared to normal broilers. The naked neck broilers had significantly higher body weight and better feed conversion ratio than na/na broilers. The Na/Na or Na/na broilers exhibited higher giblet yield, blood loss and lower feather mass compared to na/na broilers. The results indicated that the reduction in feather coverage in Na/Na and Na/na broilers facilitates better heat dissipation with lower body temperature, more body weight gain, better FCR and carcass traits compared to normal broilers.

Performance assessment of Cu2SnS3 (CTS) based thin film solar cells by AMPS-1D

Ejarder Sabbir Hossain,Puvaneswaran Chelvanathan,Seyed Ahmad Shahahmadi,Kamaruzzaman Sopian,Badariah Bais,Nowshad Amin 한국물리학회 2018 Current Applied Physics Vol.18 No.1

A relative performance assessment of copper tin sulfide (CTS) thin film solar cells with different phases such as, cubic, tetragonal, and orthorhombic as an absorber layer has been carried out by AMPS-1D simulation software. Based on the proposed device architecture, the effects of thickness and carrier concentration for the absorber layer as well as the back metal contact with various work function are studied in order to improve the performance of CTS solar cell. It is found that 1018 cm3 and 2500 e3000 nm are optimum values for carrier concentration and thickness for all the investigated CTS absorber layer phases, respectively. On the other hand, back contact metal work function of 5.28 eV, 5.67 eV and 5.71 eV are identified to be the optimal values for cubic, tetragonal, and orthorhombic phases, respectively. We have analyzed in detail the output performance of CTS thin film solar cell with respect to its fabrication, which can serve a constructive research pathway for the thin film photovoltaic industry.

Characterization of TixZn(1−x)Al2O4 Thin Films by Sol-gel Method for GPS Patch antennae

Huda Abdullah,Wan Nasarudin Wan Jalal,Mohd Syafiq Zulfakar,Mohammad Tariqul Islam,Badariah Bais,Sahbudin Shaari 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.1

The need for miniaturization and weight reduction of a GPS patch antennae has forced scientiststo search for new microwave dielectric materials. The sol-gel method was used to prepareTixZn(1−x)Al2O4-based microwave dielectric ceramic thin films (x = 0.00, 0.10, 0.20 and 0.30) andto fabricate a GPS patch antennae. The phases of ZnAl2O4 and TiO2 co-exist with each otherand form a two-phase system, which is confirmed by the X-ray diffraction (XRD) patterns andthe Fourier-transform infrared (FTIR) spectra analysis. The addition of titanium dioxide (TiO2)increased the crystallite size, grain size, surface roughness and apparent density. A material witha higher density tends to increase the dielectric constant ("r), which is suitable for miniaturizationof a GPS patch antenna. As the TiO2 content increased, the "r values increased linearly. Finally,GPS patch antennae were successfully fabricated using the ZnAl2O4 and Ti0.30Zn0.70Al2O4 material. The performances and the operating frequencies of the GPS patch antennae were measuredusing a PNA series network analyzer. The result showed that both patch antennae resonated atfrequency of 1.570 GHz and gave a return loss less than −10 dB. The optimal performance of theGPS patch antennae was obtained from the specimen using Ti0.30Zn0.70Al2O4 ("r 14.57, widebandwidth of 240 MHz and low return loss of −34.5 dB), which meets the requirements of GPSapplications.

Comparison of atmospheric spectral radiance measurements from five independently calibrated systems

Pissulla, D.,Seckmeyer, G.,Cordero, R.R.,Blumthaler, M.,Schallhart, B.,Webb, A.,Kift, R.,Smedley, A.,Bais, A.F.,Kouremeti, N.,Cede, A.,Hermang, J.,Kowalewski, M. Korean Society of Photoscience 2009 Photochemical & photobiological sciences Vol.8 No.4

A variety of instruments have been developed over the past 50 years to measure spectral radiance in absolute units at UV and visible wavelengths with high spectral resolution. While there is considerable experience in the measurement of spectral irradiance, less emphasis has been given to the reliable measurement of spectral radiance from ground observations. We discuss the methodology and calibration procedures for five instruments capable of making such measurements. Four of these instruments are based on double monochromators that scan each wavelength in turn, and one is based on a single monochromator with a charged coupled device (CCD) allowing the recording of all wavelengths simultaneously. The measured spectral radiance deviates between 3% and about 35% depending on the instruments. The results are compared with radiative transfer calculations when the aerosol characteristics of the atmosphere are known.

Female Sterilization by Minilaparotomy using BAI'S Uterine Elevator

Bai, Byoung Choo 中央醫學社 1997 中央醫學 Vol.62 No.3

This is the clinical data on 2,000 women's voluntary sterilized by interval minilaparotomy procedures using author's uterine elevator in Seoul, Korea. From 1976 to 1990, 2000 outpatients minilaparotomy sterilization using the uterine elevator, devised by author, were performed mainly(97 %) under the local anesthesia. The minilaparotomy technique, using standard operating room equipment and Bai's elevator is described. Access to the Fallopian tubes were achieved by elevating the uterus with uterine elevator. Elevator is mentioned and its usefulness pointed out in relation to practice in developing countries. Ninety seven percent of the procedures were performed with local anesthesia, the modified pomeroy technique were used for tubas legation. The mean operating time was 9.8 minutes and the minor complication rate was 1.1 % and postoperative complication rate was 0.8%. The mean time of the postoperative hospital stay was 4 hours, however the postoperative intra uterine pregnancies and tubal pregnancies have been occurred in 2 cases respectively. None of the patient in this study group required readmission to the hospital and there was no death. The result of this study suggest that tubal legation via Bai's minilaparotomy is practical, safe, simple, effective and inexpensive.

女性不姙術에 關한 硏究 : 腹式小切開卵管不姙術

裵炳胄 대한적십자사 1976 적십자병원지 Vol.3 No.1

Minilaparotomy 불임술(不妊術)과 복강경불임술(腹腔鏡不妊術)에 관(關)한 비교연구(比較硏究)

배병주,Bai, Byoung-Choo 대한생식의학회 1977 Clinical and Experimental Reproductive Medicine Vol.4 No.1

Anderson(1937), Power and Barnes(1941) reported a study concerning a method of tubal sterilization in association with peritoneoscopy or laparoscopy in which they cauterized the tubes. There appears to have been a hiatus of interest in sterilization (cold or hot) associated with laparoscopy until reintroduction by Palmer(1963), Frangenheim(1964) and Steptoe(1967). On the other hand, for interval female sterilization, however, minilaparotomy is relatively new. By Saunder and Munsick(1972), John Lyle(1974), Frank Stubb(1974), Vitoon(1973) and B.C. Bai(1975), their own technique for interval female sterilization requires 2.0 to 2.5cm, incision at the margin of the mons pubis. In Korea, female sterilization by means of minilaparotomy firstly reported by B.C. Bai using Bai's uterine elevator, of his own device, early in 1975. Recently inteval female sterilization by laparoscopy and minilaparotomy are widely accepted throughout the world especially in Asian countries. Minilaparotomy is carried out from 1974, laparoscopic sterilization from 1976, and in this study each of 250 cases of those were analysed and discussed for the comparison at Seoul Red Cross Hospital. (1) In the age distribution, numerous clients were in their age of $31{\sim}35$ in laparoscopy as well as minilaparotomy. Average 33.7 years in L and 33.2 years in M. (M=minilaparotomy, L=laparoscopic sterilization) (2) As regarding living children, women having 3 children represented the greatest number, 113 cases out of 250 in M group and 102 cases out of 250 in L group. Average No. of child are 2.9 in Land 3.1 in M. (3) Concidering the operation day in the menstrml cycle, the greatest number of cases, those who underwent tubal sterilization during the days of $26{\sim}$, next during the $6{\sim}10$ days of the cycle in both group. (4) Concidering the operation time, 188 cases by laparoscopy were performed in $6{\sim}10$ minutes, 33 cases within 5 minutes and 24 cases in $11{\sim}15$ minutes. Maximum 50 minutes, minimum 4 minutes and average 8.3 minutes. The majority of cases (154 cases) by minilaparotomy required $6{\sim}10$ minutes and 67 cases $11{\sim}15$ minutes, 6 cases within 5 minutes. Maximum 30 minutes, minimum 4 minutes and average 10.4, minutes. In both groups, most of the reasons for the extra length were surgical difficulties such as thick abdominal wall, pelvic adhesion, less cooperation of patients in early period of this study. (5) Hospital stay after operation in L group required $3{\sim}4$ hours in 125 cases, $2{\sim}3$ hours in 41 cases, $4{\sim}5$ hours in 32 cases out of 250. Maximum 8 hours, minimum 1 hour and average 3.8 hours. In M group hospital stay required $6{\sim}7$ hours in 100 cases, over 7 hours in 85 cases, $5{\sim}6$ hours in 46 cases and so on. Maximum 14 hours, minimum 2 hours and average 6.5 hours. (6) The time between operation and gas passing in the majority cases of both groups, were $12{\sim}36$ hours. A veragetime 20.3 hours in L and 27.2 in M. (7) Laparoscopic sterilization coincident with induced abortion were carried out in 27 cases, laparoscopy with minilaparotomy to control for mesosalpingeal hemorrhage in 1 case. Minilaparotomy coincident with induced abortion were performed in 65 cases, D and C whit polypectomy, menstrual regulatian, and remaval of IUD in 1 case respectively. (8) In L group, 1 case of mesosalpingeal hemorrhage, 1 case of abdominal wall infection were complicated during operation. In M group, 1 case of uterine perfaration, 1 case of abdominal wall infection, 1 case of hemorrhage from omentum and 1 case of bloody vaginal discharge were complicated. No intensive medical treatment was required for those minor complications in both groups. (9) No failure has been recognized and these two sterilization techniques might be the simple, safe and the most effective method fo