Jae Min Kim

Inha University Hospital, Sinhyeon, Gyeongsangnam-do, South Korea

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Publications (100)98.71 Total impact

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    ABSTRACT: Recent studies have shown that embedded DRAM (eDRAM) is a promising approach for 3D stacked last-level caches (LLCs) rather than SRAM due to its advantages over SRAM; (i) eDRAM occupies less area than SRAM due to its smaller bit cell size; and (ii) eDRAM has much less leakage power and access energy than SRAM, since it has much smaller number of transistors than SRAM. However, different from SRAM cells, eDRAM cells should be refreshed periodically in order to retain the data. Since refresh operations consume noticeable amount of energy, it is important to adopt appropriate refresh interval, which is highly dependent on the temperature. However, the conventional refresh method assumes the worst-case temperature for all eDRAM stacked cache banks, resulting in unnecessarily frequent refresh operations. In this paper, we propose a novel temperature-aware refresh scheme for 3D stacked eDRAM caches. Our proposed scheme dynamically changes refresh interval depending on the temperature of eDRAM stacked last-level cache (LLC). Compared to the conventional refresh method, our proposed scheme reduces the number of refresh operations of the eDRAM stacked LLC by 28.5% (on 32 MB eDRAM LLC), on average, with small area overhead. Consequently, our proposed scheme reduces the overall eDRAM LLC energy consumption by 12.5% (on 32 MB eDRAM LLC), on average.
    No preview · Article · Feb 2016 · Microprocessors and Microsystems
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    DESCRIPTION: J Neurosurg. 2001 Jun;94(6):1022-3. No abstract available. PMID: 11409509
    Full-text · Research · Dec 2015
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    Dae-Hyun Jang · Min-Wook Kim · Se-Jeong Oh · Jae Min Kim
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    ABSTRACT: Purpose: To evaluate the pathological effect of the duration of arm swelling on the shoulder pathology in patients with breast cancer-related lymphedema. Methods: Forty seven breast cancer patients with unilateral arm lymphedema were assessed. The duration of the arm swelling and shoulder pain were recorded. Ultrasound examination of the shoulder joint was performed in all patients to detect any lesions. Results: Abnormalities were detected by ultrasound in 41/47 (87.2%) study participants. Subacromial subdeltoid bursal thickening was found in 26/47 (55.3%) participants, distension of the biceps brachii tendon sheath was found in 14/47 (29.8%) and a supraspinatus tendon tear was found in 13/47 (27.7%). Patients with a supraspinatus tendon tear were found to have a significantly longer duration of lymphedema (1310 days vs. 398 days, p = 0.032). Conclusions: The duration of arm lymphedema has a progressive pathological effect on rotator cuff. Clinicians should adopt an early management approach of shoulder pain in patients with breast cancer-related lymphedema.
    Preview · Article · Nov 2015 · PLoS ONE
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    ABSTRACT: Myxomas are rare benign tumors that originate from mesenchymal tissue. They usually develop in the atrium of the heart, the skin, subcutaneous tissue, or bone. Involvement of the skull base with an intracranial extension is very rare and not well-described in the literature. We report a rare case of primary intracranial ossifying myxoma arising from the anterior skull base and mimicking a huge chondrosarcoma, and we review the relevant literature.
    Full-text · Article · Nov 2015 · Journal of Korean Neurosurgical Society
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    ABSTRACT: The present study evaluated the protective effect of Centella asiatica (gotu kola) leaf extract (CAE) against indomethacin (IND)-induced gastric mucosal injury in rats. Gastric mucosal injury was induced by the oral administration of IND to the rats after a 24 h fast. CAE (50 or 250 mg/kg) or lansoprazole (a reference drug) was orally administrated 30 min before the IND administration, and 5 h later, the stomachs were removed to quantify the lesions. Orally administered CAE significantly reduced IND-induced gastric injury. The histopathological observations (hematoxylin-eosin and Periodic acid-Schiff staining) confirmed the protection against gastric mucosal injury. Also, CAE decreased the malondialdehyde content compared to the control group. Moreover, pretreatment with CAE resulted in a significant reduction in the elevated expression of tumor necrosis factor, Cyclooxygenase (COX)-2, and inducible nitric oxide synthase. These results suggested that CAE possesses gastroprotective effects against IND-induced gastric mucosal injury, which could be attributed to its ability to inhibit lipid peroxidation and stimulate gastric mucus secretion in the rat gastric mucosa.
    No preview · Article · Oct 2015 · Journal of medicinal food
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    Full-text · Article · Oct 2015
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    ABSTRACT: Background: Because the method used for a suicide attempt is an important determinant of outcome, these methods should be explored. The present study was a nationwide investigation of suicide attempts and the characteristics of suicidal behavior. Aims: To compare the suicide methods used in attempted suicides with those used in completed suicides and to examine the factors associated with each phenomenon. Methods: The present study reviewed the medical charts of subjects who had attempted suicide and subsequently visited the emergency rooms of 17 medical centers from May 1, 2013 to November 7, 2013. All subjects completed a full psychiatric interview conducted by trained psychiatric residents. Suicide-attempt methods were divided into the following six categories: drug poisoning, pesticide poisoning, gassing, cutting, hanging, and others. The associations among demographic variables, related psychiatric variables, and suicide-attempt methods were analyzed using a multinomial regression analysis. Results: Of the 1359 suicide attempts or instrumental suicide-related behaviors with/without injuries and the 14,160 completed suicides, drug poisoning and cutting were the most common suicidal behaviors with/without injuries, but they were the least frequent method of completed suicides. In contrast, hanging and jumping from a height were less common among failed suicide attempts but resulted in a higher percentage of fatalities. Being male, age, and area of residence were associated with pesticide poisoning, whereas previous suicide attempts were associated with cutting, pesticide poisoning, and gassing. Conclusion: A previous suicide attempt is a risk factor for suicide; thus, assessing the characteristics of suicide attempts or instrumental suicide-related behaviors with/without injuries is necessary to prevent these attempts. The present findings showed that the methods of suicide used by individuals who only attempted suicide differed from those used by individuals who completed. Of the suicide methods, pesticide poisoning was related to age, residential area (urban), and a history of previous suicide attempts.
    Full-text · Article · Sep 2015 · Journal of Affective Disorders
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    ABSTRACT: Neurological deficits after brain surgery are not uncommon, and correct and prompt differential diagnosis is essential to initiate appropriate treatment. We describe a patient suffering from loss of consciousness due to hyperammonemia, following valproic acid treatment after surgery for an unruptured cerebral aneurysm. A 57-year-old female patient underwent successful aneurysmal neck clipping to correct an unruptured aneurysm. Her postoperative course was good, and she received anti-epileptic therapy (valproic acid) and a soft diet. Within a few days the patient experienced mental deterioration. Her serum valproic acid reached toxic levels (149.40 mg/L), and serum ammonia was fifteen times the upper normal limit (553 mmol/L; normal range, 9-33 mmol/L). After discontinuation of valproic acid and with conservative treatment, the patient recovered without any complications. Valproate-induced hyperammonemic encephalopathy is an unusual but serious neurosurgical complication, and should not be disregarded as a possible cause of neurological deficits after neurovascular surgery. Early diagnosis is crucial, as discontinuation of valproic acid therapy can prevent serious complications, including death.
    Preview · Article · Sep 2015 · Journal of Korean Neurosurgical Society
  • Jun Ho Lee · Jae Min Kim · Ji Geun Jang
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    ABSTRACT: Four kinds of red phosphorescent organic light-emitting devices were fabricated and compared to investigate the effect of interfacial layers for hole transport and electron injection. 1 nm-thick LiF in the device A and C and 1 nm-thick Cs2CO3 in the device B and D were deposited as an electron injection layer between the anode and the electron transport layer, and 5 nm-thick layer of dipyrazion[2,3-f:2′,2′-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile[HATCN] was inserted as a hole transport interfacial layer between the hole injection layer and the hole transport layer only in the device C and D. Under a luminance of 1000 cd/m2, the power efficiencies were 7.6 lm/W and 8.5 lm/W in the device A and B, and 8.6 lm/W and 13.4 lm/W in the device C and D. The quantum efficiency of the device D was 15.8% under 1000 cd/m2 which was somewhat lower than those of the device A and C, but a little higher than that of the device B. The luminance of the device D was much higher than those of the other devices at a given votage. The luminance of the device D at 7 V was 23,710 cd/m2, which was 13.0, 3.4, and 4.0 times higher than those of the device A, B, and C at the same voltage, respectively.
    No preview · Article · Sep 2015 · Molecular Crystals and Liquid Crystals
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    ABSTRACT: Copeptin, the C-terminal part of provasopressin, has emerged as a novel prognostic marker after hemorrhagic or ischemic stroke. The aim of this study was to quantitatively assess the prognostic significance of plasma copeptin level on functional outcome and mortality in patients with acute stroke using a meta-analysis of the available evidence. Thirteen relevant studies from 2,746 patients were finally included in our study. An elevated plasma copeptin level was associated with an increased risk of unfavorable outcome and mortality after stroke (OR 1.77; 95% CI, 1.44-2.19 and OR 3.90; 95% CI 3.07-4.95, respectively). The result of the pooled measure on standardized mean difference (SMD) was that plasma copeptin levels were found to be significantly higher in patients who died compared to survivors (SMD 1.70; 95% CI, 1.36-2.03). A stratified analysis by study region showed significant differences in SMD of copeptin, and the heterogeneity among studies was significantly decreased. However, the positive association of copeptin with poor prognosis after stroke was consistent in each stratified analysis. The present meta-analysis suggests that early measurement of plasma copeptin could provide better prognostic information about functional outcome and mortality in patients with acute stroke.
    Full-text · Article · Jun 2015 · Scientific Reports
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    ABSTRACT: Hemorrhagic metastatic brain tumors of hepatocellular carcinoma (HCC) are rare and have been mostly presented as intracranial hemorrhage (ICH). A 51-year-old male patient presented with sudden altered level of consciousness. He suffered from HCC since 2010 and transarterial chemoembolization was performed three times for HCC. The brain computed tomography (CT) scans revealed subdural hematoma (SDH) in the right fronto-temporal area and 6.0×3.5 cm sized ICH in the right parieto-occipital lobe. Brain angiographic CT scans demonstrated that the hemorrhagic lesions did not include any enhancing lesions and vascular abnormalities. We undertook a decompressive craniectomy and evacuation of the acute SDH and ICH. During evacuation of ICH, the yellowish mass was observed in the cortical surface of the right occipital lobe. Pathological examination displayed the findings of metastatic brain tumor from HCC. Metastatic brain tumors should be considered in the differential diagnosis as a cause of spontaneous SDH with ICH.
    Full-text · Article · Apr 2015
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    ABSTRACT: Resorption of autologous bone flap grafts is a known long-term complication of cranioplasty following decompressive craniectomy (DC). We analyzed our data to identify risk factors for bone flap resorption (BFR) following cranioplasty.
    Full-text · Article · Jan 2015

  • No preview · Article · Jan 2015
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    ABSTRACT: Disturbance in self-experience has been considered to be a core feature of schizophrenia. Evidence from mirror face-recognition tasks supports the connection between self-face recognition and self-awareness which is a part of self-experience. The aim of this study was to investigate the self-other boundary recognition using morphed face pictures in patients with schizophrenia.
    Full-text · Article · Jan 2015
  • Sang-Uk Lee · Min-Wook Kim · Jae Min Kim

    No preview · Article · Jan 2015 · Journal of Korean Neurosurgical Society
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    ABSTRACT: We aimed to examine internalized stigma of patients with mental illness in Korea and identify the contributing factors to internalized stigma among socio-demographic, clinical, and psychosocial variables using a cross-sectional study design. A total of 160 patients were recruited from a university mental hospital. We collected socio-demographic data, clinical variables and administered self-report scales to measure internalized stigma and levels of self-esteem, hopelessness, social support, and social conflict. Internalized stigma was identified in 8.1% of patients in our sample. High internalized stigma was independently predicted by low self-esteem, high hopelessness, and high social conflict among the psychosocial variables. Our finding suggests that simple psychoeducation only for insight gaining cannot improve internalized stigma. To manage internalized stigma in mentally ill patients, it is needed to promote hope and self-esteem. We also suggest that a relevant psychosocial intervention, such as developing coping skills for social conflict with family, can help patients overcome their internalized stigma. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.
    No preview · Article · Dec 2014 · Psychiatry Research
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    ABSTRACT: This study is to investigate the actual using patterns and clinical effects of topiramate in patients with neurosurgical disease as antiepileptic drugs (AEDs) in 94 korean multicenters. A total of 7,152 patients who had taken topiramate for at least 3 months between August 2008 and February 2009 were eligible to participate in this study. We evaluated demographic data, disease entities, duration of topiramate administration, initial and subsequent dosage adjustment, concomitant AEDs, the frequency of seizure reduction, and adverse events. Topiramate was commonly prescribed in stroke (38%) and head trauma group (36%). In the dosage of topiramate, the mean initial dosage was 65 mg/day, and the mean maintenance dosage was adjusted into 105 mg/day. The mean duration of the initial dosage for topiramate administration was 24 days, and the mean duration of the maintenance dosage was 125 days, respectively. Among groups with prophylactic administration, 98% did not develop convulsion and among groups with therapeutic administration, 2% was ineffective to control seizure. After taking topiramate, 2% patients showed adverse events, that sensory aberration was the most common. These results suggest that topiramate prescribe widely in diverse neurosurgical disorders, and effective in reduction of seizure frequency, and does not cause serious adverse effects comparable with old AEDs.
    Full-text · Article · Dec 2014
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    Chang Hoon Oh · Nam Su Park · Jae Min Kim · Min Wook Kim
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    ABSTRACT: To determine an ideal stimulation site of the medial antebrachial cutaneous nerve (MACN) using ultrasound measurement and to compare the efficiency of the new stimulation site with the conventional stimulation site on the nerve conduction study. Both arms of 15 healthy participants were measured using ultrasound. The MACN was identified in the transverse view at each 0, 2, 4, 6, and 8 cm proximal sites from the medial epicondyle, and the distances to the median nerve and to the skin from the MACN were measured. The ideal stimulation site should be located at the level which can give the shortest distance from the skin and the longest distance from the median nerve in terms of volume conduction. To confirm the efficiency of the ideal site, we measured the amplitude of the MACN conduction study at the ideal site against one at the 4 cm proximal to the medial epicondyle (conventional site). The ultrasound showed the ideal stimulation site for the MACN could be the elbow crease line. However, the nerve conduction study revealed that the amplitudes of the MACN were significantly larger at the 4 cm proximal to the medial epicondyle compared with ones at the ideal site. The ideal stimulation site based on the ultrasound did not permit better stimulation site for the nerve conduction study of the MACN compared with the conventional site. Careful adjustment of the stimulation site on the basis of this study would contribute to an accurate conduction study of the MACN.
    Preview · Article · Dec 2014 · Annals of Rehabilitation Medicine
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    ABSTRACT: The aim of this study was to investigate the potential of using phase-contrast radiography to detect early changes in articular cartilage in a mouse model of osteoarthritis. An iodoacetate-induced mouse model of osteoarthritis was used. Mice with iodoacetate-induced osteoarthritis were euthanized at 1 and 2 wks after injection. Specimens were obtained by sectioning mouse tissue into 5-mm-thick slices. Sections were examined using synchrotron x-rays from the 7B2 beamline at the Pohang Light Source. Magnified microradiographic images, obtained by phase-contrast radiography, were used to identify changes in articular cartilage and the subchondral bone. Refraction-enhanced phase-contrast radiography enabled detailed microscopic and macroscopic observation of articular cartilage by a noninvasive technique. Detailed microscopic images revealed partially damaged articular cartilage, containing an irregular trilaminar zone, at 1 wk after injection. At 2 wks after injection, a necrotic cleft was clearly visible, along with collapse of the trilaminar zones. Shrunken chondrocytes and chondrocyte clusters of variable sizes were also observed. Phase-contrast radiography is a feasible technique for the early detection of osteoarthritis and is capable of detecting microstructural changes in articular cartilage.
    No preview · Article · Nov 2014 · American journal of physical medicine & rehabilitation / Association of Academic Physiatrists
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    ABSTRACT: Accurate modelling of a chip is a very important factor when analysing and predicting radio-frequency (RF) receiver sensitivity. Chip modelling based on the tangential electromagnetic (EM) field from the near-field measurement just above the top surface of the chip is introduced, and a methodology utilising three-dimensional (3D) EM simulation, for predicting receiver sensitivity generated by the chip-noise of a mobile phone, is suggested. It is worth noting here that the calculation of absolute coupling values between a noise source and an antenna is possible by using the real measured data source to obtain reliable results.
    No preview · Article · Nov 2014 · Electronics Letters

Publication Stats

741 Citations
98.71 Total Impact Points

Institutions

  • 2015
    • Inha University Hospital
      Sinhyeon, Gyeongsangnam-do, South Korea
  • 2013-2015
    • Dankook University
      • • Department of Electronic Engineering
      • • Department of Electrical Engineering
      Eidō, Chungcheongbuk-do, South Korea
    • Inha University
      Incheon, Incheon, South Korea
    • Seoul National University Bundang Hospital
      • Department of Ophthalmology
      Sŏul, Seoul, South Korea
  • 2006-2015
    • Hanyang University Medical Center
      Sŏul, Seoul, South Korea
  • 2000-2015
    • Hanyang University
      • College of Medicine
      Sŏul, Seoul, South Korea
  • 2014
    • Yonsei University
      • Department of Psychiatry
      Sŏul, Seoul, South Korea
    • Incheon St. Mary’s Hospital, Catholic Medical Center
      Bucheon, Gyeonggi-do, South Korea
  • 2011-2014
    • Seoul National University
      • Department of Ophthalmology
      Sŏul, Seoul, South Korea
    • Korea University
      • Department of Computer Science and Radio Communications Engineering
      Sŏul, Seoul, South Korea
  • 2007-2014
    • Catholic University of Korea
      • • Department of Rehabilitation Medicine
      • • College of Medicine
      Sŏul, Seoul, South Korea
  • 2004-2014
    • Chonnam National University
      • • Department of Psychiatry
      • • Department of Aquaculture
      Gwangju, Gwangju, South Korea
    • Pusan National University
      Tsau-liang-hai, Busan, South Korea
  • 2010-2013
    • Seoul National University Hospital
      • Department of Ophthalmology
      Seoul, Seoul, South Korea
    • Korea Institute of Industrial Technology
      안산시, Gyeonggi-do, South Korea
  • 2008
    • Kyung Hee University
      • Advanced Display Research Center
      Sŏul, Seoul, South Korea
  • 2005
    • Chonnam National University Hospital
      Sŏul, Seoul, South Korea