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95 results on '"Han, D.J."'

77. Strain-space plasticity formulation for hardening-softening materials with elastoplastic coupling

Author

Han, D.J. and Chen, W.F.

Abstract

Engineering materials such as concretes, rocks and soils exhibit a strong strain-softening behavior in the post-failure range, showing a significant elastoplastic coupling for the degradation of elastic modulus with increasing plastic deformation. Stress-space formulation of plasticity based on Drucker’s stability postulate for these materials encounters difficulties in modeling the softening/elastoplastic coupling behavior; strain-space formulation is therefore necessary for further progress. In this article we first introduce a general form of strain-space plasticity formulation which is somewhat similar to that developed previously by Yoder and Iwan. To account for the elastoplastic coupling effect, the conventional plasticity theory is combined with the fracturing theory of Dougill to give a more general form of strain-space formulation. Attempt is then made to apply the general theory to model the softening behavior of a concrete element failed in a mixed crushing/cracking mode.

Published
1986
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84. Measurements of source coupled logic "exclusive or" circuit and ring oscillator of SOI Si vertical dual carrier field effect transistor with effective channel length of 5-30nm

Author

Tang, Z.M., primary, Li, G.H., additional, Ying, R., additional, Xu, Y.Z., additional, Yang, Y.H., additional, Huang, D.H., additional, Xu, P., additional, Shen, S.G., additional, Lin, C.L., additional, Yan, F.Z., additional, Han, D.J., additional, Tien, X.N., additional, Ji, Y.Z., additional, Du, D.S., additional, and Huang, C., additional

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89. Real Renal Function After Renal Autotransplantation Through the Analysis of Solitary Kidney Autotransplantation Cases.

Author

Gwon, J.G., Kim, Y.H., and Han, D.J.

Subjects
*AUTOTRANSPLANTATION, *KIDNEY function tests, *CREATININE, *GLOMERULAR filtration rate, *SURGICAL complications
Abstract

Introduction Previous studies of the safety of renal autotransplantation (RAT) have been limited by a lack of evidence. Because of the influence of the opposite kidney, it is difficult to evaluate actual renal function. This study evaluated the actual results of RAT by collecting only cases involving a solitary kidney. Methods Between September 1, 1999, and November 30, 2015, 9 RAT procedures were performed in 9 patients with a solitary kidney. We retrospectively evaluated medical data collected prospectively. Renal function was evaluated using the creatinine level and the estimated glomerular filtration rate (eGFR). Results The indications for RAT differed among the nin9e study patients. Five patients had complex renovascular problems, 2 were treated for partial nephrectomy, 1 was had a radically resected ureter due to ureteral cancer, 1 patient underwent RAT for the preservation of renal function during suprarenal-type abdominal aortic aneurysm repair. The mean cold ischemic time was 116.66 minutes (range, 21–256), and the mean follow-up duration was 54.2 months (range, 1 to 184). There were no significant decreases in eGFR until 12 months except 1 patient who underwent RAT with partial nephrectomy due to renal cell cancer. Conclusions We report stable renal function after RAT in patients with solitary kidney. Postoperative complications were rare. This is evidence for the safety of RAT. [ABSTRACT FROM AUTHOR]

Published
2017
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94. State of Korea's petrochemical industry by 2000 and beyond.

Author

Han, D.J.

Subjects
*PETROLEUM chemicals industry, *FORECASTING
Abstract

Presents forecasts on the South Korean petrochemical industry. Growth in the industry; Ethylene capacity; Factors affecting its profitability; Expansion projects for petrochemical downstream products.

Published
1996

95. An inexact fuzzy two-stage stochastic model for quantifying the efficiency of nonpoint source effluent trading under uncertainty

Author

Luo, B., Maqsood, I., Huang, G.H., Yin, Y.Y., and Han, D.J.

Subjects
*SEWAGE, *AGRICULTURAL pollution, *WATER pollution, *POLLUTION
Abstract

Abstract: Reduction of nonpoint source (NPS) pollution from agricultural lands is a major concern in most countries. One method to reduce NPS pollution is through land retirement programs. This method, however, may result in enormous economic costs especially when large sums of croplands need to be retired. To reduce the cost, effluent trading can be employed to couple with land retirement programs. However, the trading efforts can also become inefficient due to various uncertainties existing in stochastic, interval, and fuzzy formats in agricultural systems. Thus, it is desired to develop improved methods to effectively quantify the efficiency of potential trading efforts by considering those uncertainties. In this respect, this paper presents an inexact fuzzy two-stage stochastic programming model to tackle such problems. The proposed model can facilitate decision-making to implement trading efforts for agricultural NPS pollution reduction through land retirement programs. The applicability of the model is demonstrated through a hypothetical effluent trading program within a subcatchment of the Lake Tai Basin in China. The study results indicate that the efficiency of the trading program is significantly influenced by precipitation amount, agricultural activities, and level of discharge limits of pollutants. The results also show that the trading program will be more effective for low precipitation years and with stricter discharge limits. [Copyright &y& Elsevier]

Published
2005
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