Search results for: J.H. Ha

Items from 1 to 20 out of 30 results

article

Associational analysis between sleep-related variables and sleep positional difference of apnea-hypopnea index in obstructive sleep apnea syndrome

J. Shin, D.H. Park, S.H. Ryu, J.H. Ha, more

European Neuropsychopharmacology > 2017 > 27 > S4 > S1036

article

Differences in quantitative electroencephalograms between two subtypes of attention deficit hyperactivity disorder

J.H. Ha, M.K. Song, D.H. Park

European Neuropsychopharmacology > 2017 > 27 > S4 > S1094-S1095

article

A Comparison of Preferences for the Benefits and Risks of Statins Among Korean Physicians and Patients Using a Discrete-Choice Experiment

J.H. Byun, S.H. Kwon, J.H. Ha, E.K. Lee

Value in Health > 2014 > 17 > 7 > A757

article

Eliciting the Relative Importance of Key Elements for Benefit-Risk Assessment: A Comparison Among General Population, Health Authority and Medical Doctors

J.H. Ha, H.S. Na, M.W. Chung, J.H. Byun, more

Value in Health > 2013 > 16 > 7 > A487

article

P.2.b.004 Improvement in subjective and objective neurocognitive functions in patients with major depressive disorder: tianeptine versus escitalopram

H.J. Jeon, J.M. Woo, S.H. Lee, E.J. Kim, more

European Neuropsychopharmacology > 2013 > 23 > Supplement 2 > S320-S321

article

P.2.a.002 Depressive state and personality trait as predictive factors for the suicide risk among the low-income general population

J.H. Ha, D.H. Park, D.H. Yoon

European Neuropsychopharmacology > 2012 > 22 > Supplement 2 > S225-S226

article

Production of bio-ethanol by simultaneous Saccharification and fermentation process using waste from beer fermentation broth

J.H. Ha, N. Shah, M. Ul-Islam, J.K. Park

Journal of Biotechnology > 2010 > 150 > Supplement > 147-148

article

The G12 family proteins upregulate matrix metalloproteinase-2 via p53 leading to human breast cell invasion

A. Moon, E.S. Kim, J.B. Jeong, S. Kim, more

Toxicology Letters > 2010 > 196 > Supplement > S174

article

Effects of Gonadotropins on In Vitro Maturation and of Electrical Stimulation on Parthenogenesis of Canine Oocytes

BS Kim, SR Lee, BH Hyun, MJ Shin, more

Reproduction in Domestic Animals > 45 > 1 > 13 - 18

The objective of this study was to determine the effects of gonadotropins on in vitro maturation (IVM) and electrical stimulation on the parthenogenesis of canine oocytes. In experiment I, cumulus oocyte complexes were collected from ovaries at a random phase of the oestrus cycle and cultured on maturation medium treated with hCG or eCG for 48 or 72 h. There were no significant differences in the...

article

P.7.a.003 Biogenetic temperament and character and attention deficit hyperactivity symptoms in Korean preschool children

J.H. Ha, D.H. Park, J.H. Yoo, S.H. Yu, more

European Neuropsychopharmacology > 2008 > 18 > Supplement 4 > S555-S556

article

Performance of a high-pressure xenon ionization chamber for environmental radiation monitoring

H.S. Kim, S.H. Park, J.H. Ha, Y.K. Kim, more

Radiation Measurements > 2008 > 43 > 2-6 > 659-663

High-pressure xenon (HPXe) ionization chambers are ideal for use in uncontrolled environments, as a detector's response has been shown to be uniform over large temperature ranges (20–170∘C). A cylindrical HPXe ionization chamber, which was configured with a shielding mesh to improve its energy resolution, was designed on the basis of an EGSnrc simulation code to extract an optimal density of Xe gas...

article

Annealing effect of the 6H-SiC semiconductor detector for alpha particles

J.H. HA, S.M. Kang, S.H. Park, H.S. Kim, more

Radiation Measurements > 2008 > 43 > 2-6 > 1140-1143

Alpha-particle detectors based on 6H-SiC semiconductor were fabricated and their electrical and radiation performances were measured. Detector structure was Au/Ni/6H-SiC/Ni/Au multi-layer structure. The current–voltage characteristics of the SiC detectors were measured and the radiation response was evaluated by ²³⁸ Pu with 5.5MeV alpha particles at room temperature in air. The 6H-SiC detectors...

article

Surface Passivation Effect on CZT-Metal Contact

S.H. Park, J.H. Ha, Y.H. Cho, H.S. Kim, more

IEEE Transactions on Nuclear Science > 2008 > 55 > 3-2 > 1547 - 1550

The process of cadmium zinc telluride (CZT) surface passivation is very important to reduce the leakage current of the detector and to improve the detector performance. NH₄/H₂O₂ solution was identified as an effective passivation agent for CZT. We fabricated a CZT planar detector and measured the detector performances before and after the NH₄/H₂O₂ passivation. For the first time, the passivation effect...

chapter

Thermal annealing of metal-semiconductor contact for CZT detectors

S.H. Park, J.H. Ha, J.H. Lee, H.S. Kim, more

2007 IEEE Nuclear Science Symposium Conference Record > 2 > 1521 - 1524

2007 IEEE Nuclear Science Symposium

CZT can be used for high-resolution X-ray and gamma-ray spectroscopy at room temperature. Previously the thermal annealing process has been studied to decrease the leakage current of the detector and obtain a stable detector performance. Because of its low work function, indium can be used as the metal contact for a CZT Schottky detector. The low temperature annealing effect on the In/CZT contact...

chapter

Development of InSb cryogenic detector for ultra high-resolution energy spectroscopy

S.H. Park, T.Y. Song, H.S. Kim, J.H. Ha, more

2007 IEEE Nuclear Science Symposium Conference Record > 2 > 1587 - 1589

2007 IEEE Nuclear Science Symposium

High-resolution X-ray spectroscopy is required in research and application areas such as neutrino mass measurement, X-ray astronomy, semiconductor device technology and material analysis. The conventional detectors such as Si or Ge do not have enough energy resolution to meet the requirements from the various fields. Compound semiconductor with small band gap can be possible candidate detector to...

article

Properties of semiconductor scintillator ZnSe:O

Y.K. Kim, J.K. Kim, W.G. Lee, S.Y. Kim, more

Nuclear Inst. and Methods in Physics Research, A > 2007 > 580 > 1 > 258-261

Zinc selenide (ZnSe:O) single crystals doped with 2wt% of oxygen were grown by Bridgman–Stockbarger technique and annealed under excess Zn conditions. The lattice constants of the ZnSe single crystals were obtained from X-ray diffractometer (XRD) data. It is found that, after annealing at 1290K under excess Zn conditions, the lattice constant decreases but it increases with oxygen impurity. From the...

article

Schottky barrier heights of semi-insulating 6H-SiC irradiated by high-dose γ-rays

J.H. Ha, S.M. Kang, Y.H. Cho, S.H. Park, more

Nuclear Inst. and Methods in Physics Research, A > 2007 > 580 > 1 > 416-418

The 6H-SiC radiation detector samples were irradiated by ⁶⁰ Co γ-rays. The irradiation was performed with dose rates of 5 and 15kGy/h for 8hours, respectively. Metal/semiconductor contacts on the surface were fabricated by using a thermal evaporator in a high vacuum condition. The 6H-SiC detectors have metal contacts of Au(200nm)/Ni(30nm) at Si-face and of Au(200nm)/Ti(30nm) at C-face. I–V...

article

Study of the current–voltage characteristics of a SiC radiation detector irradiated by Co-60 gamma-rays

S.M. Kang, J.H. Ha, S.H. Park, H.S. Kim, more

Nuclear Inst. and Methods in Physics Research, A > 2007 > 579 > 1 > 145-147

The SiC semiconductor has recently emerged as an attractive material for an ionization radiation detection. A wide bandgap (3.03eV) and high radiation damage resistance allow for the fabrication of detectors capable of operating at a high-temperature and in high radiation fields. The major aim of our study is to develop a robust detector which will be applied to harsh radiation environments. In this...

article

Characteristics of the saturation curve of the ionization chambers in overlapping pulsed beams

S.H. Park, Y.K. Kim, H.S. Kim, S.M. Kang, more

Nuclear Inst. and Methods in Physics Research, A > 2006 > 566 > 2 > 706-712

When a pulsed radiation is incident on an air-filled ionization chamber wherein the primary electrons are rapidly absorbed to become negative ions, it is known that the reciprocal of the ionizing current is linearly proportional to the reciprocal of the polarization voltage in the near saturation region. However, the relationship between the reciprocal of the ionizing current and the reciprocal of...

article

Determination of the sub-threshold contribution in the ¹ ³ C(α,n) ¹ ⁶ O reaction for the neutrons of s-process

S. Kato, K. Abe, S. Kubono, T. Teranishi, more

Nuclear Physics, Section A > 2003 > 718 > Complete > 189-192

A large enhancement of the ¹ ³ C(α,n) ¹ ⁶ O reaction cross section at low energy limit due to the sub-threshold state in ¹ ⁷ O has been predicted, explaining the neutron source of s-process nucleosynthesis. By the ¹ ³ C( ⁶ Li,d) ¹ ⁷ O transfer reaction, we had deduced the resonance strength of the state. Contrary to the predictions,...

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Search results for: J.H. Ha

Associational analysis between sleep-related variables and sleep positional difference of apnea-hypopnea index in obstructive sleep apnea syndrome

Differences in quantitative electroencephalograms between two subtypes of attention deficit hyperactivity disorder

A Comparison of Preferences for the Benefits and Risks of Statins Among Korean Physicians and Patients Using a Discrete-Choice Experiment

Eliciting the Relative Importance of Key Elements for Benefit-Risk Assessment: A Comparison Among General Population, Health Authority and Medical Doctors

P.2.b.004 Improvement in subjective and objective neurocognitive functions in patients with major depressive disorder: tianeptine versus escitalopram

P.2.a.002 Depressive state and personality trait as predictive factors for the suicide risk among the low-income general population

Production of bio-ethanol by simultaneous Saccharification and fermentation process using waste from beer fermentation broth

The G12 family proteins upregulate matrix metalloproteinase-2 via p53 leading to human breast cell invasion

Effects of Gonadotropins on In Vitro Maturation and of Electrical Stimulation on Parthenogenesis of Canine Oocytes

P.7.a.003 Biogenetic temperament and character and attention deficit hyperactivity symptoms in Korean preschool children

Performance of a high-pressure xenon ionization chamber for environmental radiation monitoring

Annealing effect of the 6H-SiC semiconductor detector for alpha particles

Surface Passivation Effect on CZT-Metal Contact

Thermal annealing of metal-semiconductor contact for CZT detectors

Development of InSb cryogenic detector for ultra high-resolution energy spectroscopy

Properties of semiconductor scintillator ZnSe:O

Schottky barrier heights of semi-insulating 6H-SiC irradiated by high-dose γ-rays

Study of the current–voltage characteristics of a SiC radiation detector irradiated by Co-60 gamma-rays

Characteristics of the saturation curve of the ionization chambers in overlapping pulsed beams

Determination of the sub-threshold contribution in the ¹ ³ C(α,n) ¹ ⁶ O reaction for the neutrons of s-process

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