Jisung Park

High Resolution Image Download MS PowerPoint Slide Electrochemical reduction of oxygen molecules can produce H 2 O 2, which is an important chemical for a green and sustainable society; therefore, the development of catalysts for this reaction is necessary. We propose mesoporous nitrogen-doped carbon prepared from (1-methyl-1H-pyrrole-2-yl)methanol in the presence of a mesoporous SiO 2 template (KIT-6). The nitrogen content of the resulting carbon can be controlled in the range of 0–10 at. % and

This article reviews the recent literature on the economics of exposure to temperature extremes. There is growing evidence from both micro and macro studies that in the short run, exposure to extreme temperature affects health, labor supply, and labor productivity, although empirical research on potential adaptive responses in the long run remains thin. We argue that, in addition to providing well-identified causal estimates of heat-related damages, environmental economics has an important role

This study draws on costly signaling theory (CST) and explores the hidden motive of proactive knowledge sharing. We theorize that the need for status drives employees to generously share their tacit knowledge and special expertise to obtain social recognition and status as conferred by supervisory appraisal. We tested our hypotheses based on the moderated mediation model using a sample of 146 supervisor–subordinate dyads that were collected from South Korean organizations. The present analysis s

Does temperature affect economic performance? Has temperature always affected social welfare through its impact on physical and cognitive function? While many economic studies have explored the indirect links between climate and welfare (e.g. agriculture, conflict, sea-level rise), few address the possibility of direct impacts operating through physiology, despite a deep medical literature documenting the temperature sensitivity of human task performance. This paper attempts a synthesis of these

These findings are only suggestive and should not be generalized to a larger population. However, this study supports the importance of DSE and social support in the life of elderly Korean immigrants as a way to alleviate depression. Mental health professionals may consider facilitating social network when elderly Korean immigrants suffer from depression.

Bulk bitwise operations, i. e., bitwise operations on large bit vectors, are prevalent in a wide range of important application domains, including databases, graph processing, genome analysis, cryptography, and hyper-dimensional computing. In conventional systems, the performance and energy efficiency of bulk bitwise operations are bottlenecked by data movement between the compute units (e.g., CPUs and GPUs) and the memory hierarchy. In-flash processing (i. e., processing data inside NAND flash

We review recent literature on the effect of temperature stress on economic activity, operating through basic human physiology. There is growing evidence from both micro and macro studies of causal impacts of extreme temperature on health, labor supply, and labor productivity, driven in large part by extreme heat stress. There is also a suggestion of an optimal temperature zone for economic activity, though empirical research on potential adaptive responses remains thin. This emerging literature

This paper describes a new approach to implement Dynamically Allocated Multi-Queue (DAMQ) switching elements using a technique called buffers. This technique is efficient in that the amount of hardware required to manage the buffers is relatively small; it offers high performance since it is an implementation of a DAMQ. The first part of this paper describes the self-compacting buffer architecture in detail, and compares it against a competing DAMQ switch design. The second part presents extensi

The present study aimed to explore the use of meaning-making coping (existential, spiritual, and religious coping) among cancer patients in Korea and to investigate the impact of culture on their choice of coping methods. Thirty-three participants with various kinds of cancer were interviewed. Four different kinds of coping resources emerged from analyses of the interview transcripts: (1) belief in the healing power of nature; (2) mind-body connection; (3) relying on transcendent power; and (4)

We propose a new system-level solution that improves both the performance and lifetime of NAND storage systems by exploiting the performance asymmetry of NAND devices. At the device level, we propose a new program sequence, called relaxed program sequence (RPS), which allows more flexible page allocations in a block without compromising NAND reliability. By combining RPS with per-block parity pages, we can improve the write bandwidth and eliminate expensive paired page backup operations. Experim

We present a low-overhead ransomware-proof SSD, called RansomBlocker (RBlocker). RBlocker provides 100% full protections against all possible ransomware attacks by delaying every data deletion until no attack is guaranteed. To reduce storage overheads of the delayed deletion, RBlocker employs a time-out based backup policy. Based on the fact that ransomware must store encrypted version of target files, early deletions of obsolete data are allowed if no encrypted write was detected for a short in

The present study compared meaning-making coping among cancer patients in Sweden and South Korea, with a focus on the sociocultural context. Semi-structured interviews were conducted with 51 Swedes and 33 Koreans. The results showed significant differences between the two countries as well as similarities in existential, spiritual, and religious coping. For example, Swedes primarily used meaning-making coping as a means of meditation or relaxation, whereas Koreans relied on coping with prayer an

The paper describes a new approach to implement dynamically allocated multi-queue (DAMQ) switching elements using a technique called "self-compacting buffers". This technique is efficient in that the amount of hardware required to manage the buffers is relatively small; it offers high performance since it is an implementation of a DAMQ. The paper describes the self-compacting buffer architecture in detail, and compares it against a competing DAMQ switch design. It presents extensive simulation r