Jong Man Kim

Kyung Hee University, Sŏul, Seoul, South Korea

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Publications (67)138.28 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: The underwater applications of nanoenergetic materials (nEMs) could be extended by developing more convenient and reliable ignition methods. However, the underwater ignition of nEMs is a significant challenge because water perturbs the reactants prior to ignition and also quenches the subsequent combustion reaction of nEMs upon ignition. In this study, we developed flash-ignitable nEMs for underwater explosion. This was achieved by adding sea urchin-like carbon nanotubes (SUCNTs) as the optical igniter into an nEM matrix, composed of Al/CuO nanoparticles. The SUCNTs absorb the irradiated flash energy and rapidly convert it into thermal energy, and then the thermal energy is concentrated to ignite the core catalysts and neighboring nEMs. The maximum burn rate was achieved by adding 1 wt% SUCNTs into the nEM matrix. The burn rate significantly decreased with increasing amount of SUCNTs (⩾2 wt%), indicating that the remote flash ignition and controlled-explosion reactivity of nEMs are possible by incorporating an appropriate amount of SUCNTs.
    Combustion and Flame 12/2014; · 3.71 Impact Factor
  • Minkoo Kim, Jong‐Man Kim, Seung‐Woo Lee
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    ABSTRACT: Dimming technologies have been used in liquid crystal display (LCD) products, especially for mobile applications, to reduce power consumption. It is widely known that dimming technologies tend to degrade the color accuracy. This article, however, presents that color performance of a dimmed LCD is better than a conventional one. We show a max method, one of dimming methods, converting an input digital data into higher values that have less color shift phenomenon. We propose how to compare the color performance of original and dimmed colors based on a modified standard. The average value of measured Δu′v′ of 25 dimmed colors was 0.0040, whereas that of the original colors was 0.0190. In addition, the average value of measured Δ of 25 dimmed colors was 2.40, whereas that of the original colors was 9.24. The measured results prove that the dimming technology can make LCD better in not only power consumption but also color performance. This article is the world's first report that breaks the usual stereotype on dimming technologies. This work proposes a dimmed LCD as a standard color display. © 2013 Wiley Periodicals, Inc. Col Res Appl, 39, 480–485, 2014
    Color Research & Application 10/2014; 39(5). · 0.93 Impact Factor
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    ABSTRACT: J.‐M. Kim and co‐workers report on page 5186 a sensor film that allows colorimetric differentiation among saturated aliphatic hydrocarbons. The composite sensor undergoes a blue‐to‐red transition dependent on the chain length of the hydrocarbon target. The sensor film swells faster in shorter‐chain hydrocarbons, affording a faster blue‐to‐red change. In the image, the authors depict the color changes of the sensor film as a hydrocarbon marathon: the sensor film in the shorter hydrocarbon “runs” faster and displays a faster color change.
    Advanced Functional Materials 09/2014; 24(33). · 10.44 Impact Factor
  • Solar Energy 09/2014; 107:660-667. · 3.54 Impact Factor
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    ABSTRACT: Background & Aims: To evaluate the diagnostic performance of gadoxetic acid-enhanced magnetic resonance imaging (MRI) with and without additional diffusion weighted imaging (DWI) in the detection of hepatocellular carcinoma (HCC) in pre-transplant patients.Methods: We included 63 liver transplant patients (54 men, 9 women; mean age, 52 years) who underwent gadoxetic acid-enhanced MRI with DWI at 3.0-T within 90 days prior to transplantation. Two images sets were reviewed for HCC in two separate sessions by two independent observers: the gadoxetic acid set and the combined set (gadoxetic acid plus DWI). Sensitivity, specificity, positive predictive value and negative predictive value were calculated for each image set.Results: A total of 113 HCCs (size range, 0.5-7.8, mean, 2.0 ± 1.3) were identified in the 52 liver explants. The per-lesion sensitivity of the combined set (78.8% for both observers) was higher than that of the gadoxetic acid set (71.7%, p = 0.02 and 72.6%, p = 0.03 for each observer) with a trend of highest in Child-Pugh class A (94.4% and 97.2% for gadoxetic acid; 97.2% for combined), followed by class B (73.2% for gadoxetic acid; 82.9% for combined), and class C (47.2% for gadoxetic acid; 55.6% for combined; p = 0.01). The per-patient negative predictive value of the combined set was higher than that of the gadoxetic acid set for both observers (p = 0.046). There was no difference in specificity between the two image sets (p > 0.05).Conclusions: The addition of DWI to gadoxetic acid-enhanced MRI resulted in significantly higher sensitivity to detect HCC. However, sensitivity decreased with increasing cirrhosis severity for both imaging types. Liver Transpl , 2014. © 2014 AASLD.
    Liver Transplantation 08/2014; · 3.79 Impact Factor
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    ABSTRACT: This paper proposes a new method to find out optimum overdrive (OD) values through visual inspection only. The method compares different OD values applied on a scrolling pattern. We found that the scrolling pattern with the height of 2° or smaller viewing angle is the best choice to find the optimum OD values. After only three trials performed by users, it is possible to estimate the OD values for all the transitions of the LCDs.
    SID Symposium Digest of Technical Papers. 06/2014; 45(1).
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    ABSTRACT: TiO2 nanofibers (NFs) were fabricated by an electrospinning process and were used as scattering layers in dye-sensitized solar cells (DSSCs). The NF-coated photoanodes of the DSSCs were prepared with a variety of scattering layer thicknesses. The thickness effect of the scattering layer on the double-layered TiO2 nanoparticle (NP)/TiO2 NF structure was investigated through structural, morphological, and optical measurements. In the double-layered photoanode, the TiO2 NP layer plays a major role in dye adsorption and light transmission, and the TiO2 NF scattering layer improves the absorption of visible light due to the light scattering effects. The scattering effect of TiO2 NFs layer was examined by the incident monochromatic photon-to-electron conversion efficiency (IPCE) and UV-Vis spectrometry. The conversion efficiency for the 12 μm-thick photoanode composed of a 2 μm-thick TiO2 NF layer and 10 μm-thick TiO2 NP layer was higher than that of DSSCs with only TiO2 NPs photoanode by approximately 33%.
    Current Applied Physics 06/2014; · 2.03 Impact Factor
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    ABSTRACT: Exceptional challenges have confronted the rational design of colorimetric sensors for saturated aliphatic hydrocarbons (SAHCs). The main reasons for this difficulty are the extremely nonpolar nature of these targets and their lack of functional groups that can interact with probes. By taking advantage of a mechanochromic conjugated polydiacetylene (PDA) and the hydrocarbon-induced swelling properties of polydimethylsiloxane (PDMS), a sensor film that enables simple, colorimetric differentiation between a variety of C5 to C14 aliphatic hydrocarbons is fabricated. The unprecedented PDA–PDMS composite sensor undergoes a blue-to-red colorimetric transition on a timescale that is dependent on the chain length of the hydrocarbon target. In addition, the development of the red color is directly proportional to the swelling ratio of the film. This straightforward approach enables naked-eye differentiation between n-pentane and n-heptane. The versatility of the sensor system is demonstrated by using it for the colorimetric determination of kerosene in adulterated diesel oil. Finally, the observation that a PDA microcrystal in the film undergoes significant expansion and tearing in concert with a blue-to-red colorimetric transition during the swelling process provides direct evidence for the mechanism for the mechanochromic behavior of the PDA.
    Advanced Functional Materials 05/2014; 24(33). · 10.44 Impact Factor
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    ABSTRACT: We demonstrated that the size and morphology of an oxidizer have strong effects on the propulsion forces of nano-Al-based propellants. Enhanced propulsion forces could be obtained through the creation and addition of various oxidizer nanoparticles and nanowires in nano-Al-based propellants.
    Journal of Nanoscience and Nanotechnology 10/2013; 13(10):7037-41. · 1.34 Impact Factor
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    ABSTRACT: The purpose of this study was to analyze the survival of patients with biliary atresia (BA) after Kasai operation and liver transplantation (LT) and to analyze the factors affecting survival. Seventy-two patients diagnosed with BA were operated on between April 1995 and December 2009 and retrospectively analyzed. Out of the 72 patients, 59 received Kasai operation and 13 received LT without prior Kasai operation. Twenty-seven patients received LT after Kasai operation. Survival with native liver was 39 % at 10 years. With the application of LT, overall 10-year survival for patients with BA was 94.9 %. Among patients alive with native livers after Kasai operation, 14 patients (58.3 %) have at least one complication associated with biliary cirrhosis and portal hypertension. Age at which Kasai operation was performed (60 days) and postoperative normalization of bilirubin were independent risk factors for survival with the native liver, according to multivariate analysis (HR 2.90, p = 0.033 and HR 9.89, p = 0.002). Survival of BA patients has greatly increased in the era of LT. However, many patients surviving with native livers after Kasai operation continue to have signs of biliary cirrhosis and abnormal liver function.
    Pediatric Surgery International 08/2013; 29(12). · 1.06 Impact Factor
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    ABSTRACT: ABO-incompatible liver transplantation is usually contraindicated because of the risk of antibody-mediated humoral rejection of the graft. We describe 22 successful cases of patients who had living donor liver transplantation (LDLT) from ABO-incompatible donors. The immunosuppressive protocol consisted of rituximab and plasmapheresis prior to LDLT. Plasmapheresis was planned for up to 2 weeks after LDLT aiming at maintaining levels of anti-ABO titers below 1:32. The median age of recipients was 54 years and the median MELD score was 13. The initial range of isoagglutinin IgM and IgG titers were 1:8 - 1:1024 and 1:2 - 1:1024, respectively. Preoperative isoagglutinin IgM and IgG titers were achieved less than or equal to 1:8 by performing therapeutic plasma exchange (PTE). While the median number of TPE was 4 (range, 2-18) in all patients, it was 4 (range 2-8) in initial low titer group (<1:256) and was 8 (range 6-18) in the high titer group (⩾1:256). There were no statistically significant differences for liver functions tests in the first 2 weeks after transplantation between the groups having high MELD score (⩾20) vs. low MELD score (<20), local graft infusion vs. systemic infusion, or high initial isoagglutinin titer (⩾1:256) vs. low initial isoagglutinin titer (<1:256). Patient and graft survival was 100% and there was no acute humoral rejection in recipients at a mean follow-up of 10 months (range, 3-21). ABO-incompatible LDLT can be safely performed when rituximab and TPE are used, and may be proposed when ABO-compatible donors are not available.
    Journal of Hepatology 08/2013; · 9.86 Impact Factor
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    ABSTRACT: The size and morphology of the fuel and oxidizer and the pellet density are important factors influencing the burn characteristics of energetic-material (EM) pellets. Here, we demonstrate that designed structures of energetic oxidizers with various interfacial contact areas for fuel nanoparticles (NPs) can enhance the explosive reactivities of ignited EM pellets. The measured burn rates and pressurization rates for specific samples of Al NP/porous CuO nanowire (NW) composite pellets were found to be much higher than those for Al NP/CuO NP and Al NP/CuO microparticle (MP) composite pellets. In addition, the explosive reactivities of the EM pellets decreased linearly with increasing pellet density for all compositions of Al NPs/CuO MPs, Al NPs/CuO NPs, and Al NPs/CuO NWs. This suggests that the size and morphology of the oxidizer structures (from solid MPs to porous NWs) and the pellet density of the resulting EM pellets have a synergistic effect, significantly changing the interfacial contact area with the fuel NPs so that the explosive reactivity of the resulting EM pellets can be controlled precisely.
    Powder Technology 06/2013; 241:67–73. · 2.27 Impact Factor
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    ABSTRACT: We propose a novel method to drive ultra-large size and high resolution LCD TV with a single-bank data driver scheme without severe image degradation. We could achieve a maximum luminance and uniformity to be 98cd/m2 and 86%, respectively when gray 128 is displayed. This confirms excellent performance because the conventional dual-bank driver scheme achieves the counterparts to be 90cd/m2 and 93%.
    SID Symposium Digest of Technical Papers. 06/2013; 44(1).
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    ABSTRACT: BACKGROUND: Hepatocellular carcinoma (HCC) has a high predilection for portal vein invasion, and the prognosis of HCC with malignant portal vein invasion is extremely poor. The objective of this study was to investigate the outcomes and the prognostic factor of recurrence in HCC patients with malignant portal vein invasion. METHODS: We retrospectively reviewed the clinicopathologic data and outcomes of 83 HCC patients with malignant portal vein invasion and 1,056 patients without portal vein invasion who underwent liver resection. RESULTS: Increased serum alkaline phosphatase (ALP) levels, increased maximum tumor size, and intrahepatic metastasis were predisposing factors for malignant portal vein invasion by multivariate analysis. The median disease-free survival and overall survival of HCC patients with malignant portal vein invasion was 4.5 months and 25 months, respectively. The 1-year, 2-year, and 3-year disease-free survival rates were 30.6%, 26.1%, and 21.2%, respectively, and the overall survival rates for HCC patients with malignant portal vein invasion were 68.6%, 54.2%, and 41.6%, respectively. The initial detection site was the lung in HCC patients with portal vein invasion and the liver in HCC patients without portal vein invasion. C-reactive protein (CRP) was a significant independent predictor of tumor recurrence in HCC with malignant portal vein invasion after surgery. CONCLUSIONS: Increased ALP levels, increased maximum tumor size, and intrahepatic metastasis were independent predictors of malignant portal vein invasion in HCC. CRP level was closely associated with the predisposing factor of tumor recurrence in HCC patients with malignant portal vein invasion after a surgical resection, and lung metastasis was common.
    World Journal of Surgical Oncology 04/2013; 11(1):92. · 1.20 Impact Factor
  • Hepato-gastroenterology 04/2013; 60(128). · 0.91 Impact Factor
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    ABSTRACT: BACKGROUND: The degree of steatosis is an important factor that determines the graft function in the recipient and the recovery of the remnant liver in the living donor. To date, there is no consensus regarding how to assess steatosis among potential living liver donors. We evaluate the prevalence and risk factors for steatosis in living liver donors with normal serum aminotransferase levels and without fatty liver on ultrasonography (US-negative). METHODS: The degree of steatosis was assessed for a total of 492 US-negative living liver donors with normal aminotransferase levels (age 30.1±9.9; male 301 [61.2%]). Total steatosis was defined by adding the degree of macrosteatosis and microsteatosis. RESULTS: No liver donor had a severe degree (≥60%) of macrosteatosis or microsteatosis. A moderate degree (30-59%) of macrosteatosis and microsteatosis was seen in 4 (0.8%) and 26 (5.3%) subjects, respectively. Severe and moderate degrees of total steatosis were seen in 3 (0.6%) and 53 (10.8%) subjects, respectively. Body mass index and serum triglyceride levels were independent factors associated with the moderate or greater degree of total steatosis. CONCLUSIONS: Noninvasive preoperative assessment for liver steatosis (US-negative with normal aminotransferase level) was sufficient to exclude severe macrosteatosis or microsteatosis and moderate macrosteatosis but not sufficient to exclude moderate microsteatosis or total steatosis in living liver donors.
    Transplantation 03/2013; · 3.78 Impact Factor
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    ABSTRACT: BACKGROUND: At the time of transplantation, a recipient's serum is tested against the prospective donor's lymphocytes to identify specific reactivity and to look for a donor-specific crossmatch (CXM). Here, we investigated the relationship between the pretransplantation lymphocytotoxic CXM results and the long-term outcome of liver transplantation at a single center. METHODS: From October 1998 to April 2011, medical records, laboratory data, and pretransplantation lymphocytotoxic CXM results were collected from 1133 consecutive liver transplant recipients. RESULTS: We performed liver transplantations on 80 (7.1%) patients after a true-positive CXM (t+CXM). The t+CXM group exhibited higher initial aminotransferase levels immediately after transplantation compared with a negative CXM group. However, no significant differences in rejection, biliary or vascular complications, viral disease recurrence, or de novo malignancies were found. Although overall graft and patient survival did not differ between the groups, liver-specific graft survival was inferior in the t+CXM group. It was also found that, in 42 (3.7%) recipients, initially positive results converted to final negative results after the elimination of immunoglobulin M autoantibodies. We defined this subpopulation as a false-positive CXM. Significantly decreased posttransplantation aminotransferase levels with a higher incidence of de novo malignancies were observed in this group compared with negative controls. CONCLUSION: Our findings demonstrate that t+CXM transplants show increased aspartate aminotransferase and alanine aminotransferase peak immediately after transplantation, which influences liver-specific graft outcomes. Additionally, the presence of circulating immunoglobulin M autoantibodies against recipients' own antigens may be protective in liver grafts. However, this may be a predisposing factor for de novo malignancies.
    Transplantation 03/2013; · 3.78 Impact Factor
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    ABSTRACT: BACKGROUND: Hepatocellular carcinoma (HCC) <2 cm in diameter has a favorable prognosis. Therefore surgical resection of small HCC is associated with good outcomes. However, the predisposing factors of prognosis following resection of HCC remain ill-defined. The aims of the present study were to identify the clinicopathologic characteristics and outcomes of patients with small HCC and analyze the predisposing factors for tumor recurrence after surgery. METHODS: We retrospectively reviewed 180 patients with small HCC who underwent hepatectomy between 2006 and 2010. Independent predictors of tumor recurrence were identified with Cox regression analysis. RESULTS: The 1-year, 3-year, and 5-year disease-free survival rates and overall survival rates were 83.7, 68.0, 65.3, and 98.9, 96.5, 92.7 %, respectively. Multivariate analysis reported that protein induced by the vitamin K antagonist-II (PIVKA-II) ≥200 mAU/mL, alkaline phosphatase (ALP) ≥80 IU/mL, and microvascular invasion were important predisposing factors for tumor recurrence. Elevated serum PIVKA-II level was associated with microvascular invasion in small HCC, which was a powerful predisposing factor. CONCLUSIONS: Although small HCC is generally associated with a good prognosis, serum PIVKA-II level ≥200 mAU/mL, ALP ≥ 80 IU/L, and microvascular invasion were predisposing factors for tumor recurrence. These factors can be used to stratify patients with respect to recurrence after resection. Elevated PIVKA-II was closely associated with microvascular invasion in small HCC. These data emphasize the importance of PIVKA-II in small HCC.
    World Journal of Surgery 02/2013; 37(6). · 2.35 Impact Factor
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    ABSTRACT: BACKGROUND: Hepatectomy is the standard treatment for HCC. However, large HCC poses a difficult challenge because of the technical complexity of surgical resection and the fear of postoperative hepatic decompensation. We analyzed the outcome and prognostic factors in patients with large hepatocellular carcinoma (HCC >=10 cm) after surgery. METHODS: We retrospectively investigated the medical records of 91 patients who had undergone hepatectomy between January 2006 and June 2010. A survival analysis was performed utilizing the Kaplan-Meier method and prognostic factors were evaluated using Cox regression analysis. RESULTS: Of the 91 patients evaluated, most tumors were associated with hepatitis B virus (HBV). The median tumor size was 12.3 cm (range, 10 to 21 cm), with microvascular invasion present in most patients. The postoperative mortality rate was 2.2%. The median disease-free survival and overall survival were six months and 41 months. The one-year, two-year, and three-year disease-free survival rates were 33.5%, 29.3%, and 18.8%, respectively. The one-year, two-year, and three-year overall survival rates were 73.9%, 63.7%, and 54.8%, respectively. Of the 89 surviving patients, 69 patients (77.5%) developed HCC recurrence during the mean follow-up period of 23.4 +/- 15.9 months. On multivariate analysis, the statistically significant factors that predicted HCC recurrence were ALP >= 80 IU/mL (P = 0.009) and intrahepatic metastases (P = 0.013). CONCLUSIONS: Our study suggests that preoperative ALP levels (>= 80 IU/L) and intrahepatic metastases could be utilized to monitor and predict recurrence in HCC patients.
    World Journal of Surgical Oncology 02/2013; 11(1):40. · 1.20 Impact Factor
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    ABSTRACT: Pediatric liver transplantation is the standard of care for treatment of liver failure in children. The aim of this study was to identify the characteristics of pediatric liver transplantation in centers located in Korea and determine factors that influence outcomes. This retrospective study was performed using data from between 1988 and 2010 and included all recipients 18 yr old and younger who underwent pediatric liver transplantation in Korea during that period. Our data sources were hospital medical records and the outcome measure was overall patient survival. Univariate and multivariate statistical analyses were undertaken using the Cox proportional hazards model. Five hundred and thirty-four pediatric liver transplantations were performed in 502 children. Median age and average pediatric end-stage liver disease (PELD) score were 20 months and 18 point, respectively. Biliary atresia (57.7%, 308/534) was the most common cause of liver disease. Eighty-two (15.3%) were deceased donor liver transplantations and 454 (84.7%) were living donor liver transplantations. Retransplantation was performed in 32 cases (6%). Overall, 1-, 5-, and 10-yr patient survival rates were 87.8%, 82.2%, and 78.1%, respectively. In multivariate analysis, independent significant predictors of poor patient survival were chronic rejection and retransplantation. This study presents the epidemiologic data for nearly all pediatric liver transplantation in Korea and shows that the independent prognostic factors in patient survival are chronic rejection and retransplantation.
    Journal of Korean medical science 01/2013; 28(1):42-7. · 0.84 Impact Factor

Publication Stats

302 Citations
138.28 Total Impact Points


  • 2011–2014
    • Kyung Hee University
      • • Advanced Display Research Center
      • • Department of Information Display
      Sŏul, Seoul, South Korea
    • Pusan National University
      • • College of Nanoscience and Nanotechnology
      • • Department of Nanomechatronics Engineering
      Tsau-liang-hai, Busan, South Korea
    • Ulsan University Hospital
      Urusan, Ulsan, South Korea
  • 2010–2014
    • Sungkyunkwan University
      • Department of Surgery
      Sŏul, Seoul, South Korea
  • 2003–2014
    • Hanyang University
      • • Division of Chemical Engineering and Bioengineering
      • • Major in Biochemistry & Molecular Biology
      Sŏul, Seoul, South Korea
    • Chonnam National University
      • Hormone Research Center
      Gwangju, Gwangju, South Korea