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Dynamic Difficulty Adjustment via Fast User Adaptation [article]

Hee-Seung Moon, Jiwon Seo
2020 arXiv   pre-print
Dynamic difficulty adjustment (DDA) is a technology that adapts a game's challenge to match the player's skill. It is a key element in game development that provides continuous motivation and immersion to the player. However, conventional DDA methods require tuning in-game parameters to generate the levels for various players. Recent DDA approaches based on deep learning can shorten the time-consuming tuning process, but require sufficient user demo data for adaptation. In this paper, we
more » ... a fast user adaptation method that can adjust the difficulty of the game for various players using only a small amount of demo data by applying a meta-learning algorithm. In the video game environment user test (n=9), our proposed DDA method outperformed a typical deep learning-based baseline method.
arXiv:2006.15545v1 fatcat:rcoookfnbncbdjwyxv3kfol2dm

Emergent Localization in Dodecagonal Bilayer Quasicrystals [article]

Moon Jip Park, Hee Seung Kim, SungBin Lee
2018 arXiv   pre-print
A new type of long-range ordering in the absence of translational symmetry gives rise to drastic revolution of our common knowledge in condensed matter physics. Quasicrystal, as such unconventional system, became a plethora to test our insights and to find exotic states of matter. In particular, electronic properties in quasicrystal have gotten lots of attention along with their experimental realization and controllability in twisted bilayer systems. In this work, we study how quasicrystalline
more » ... rder in bilayer systems can induce unique localization of electrons without any extrinsic disorders. We focus on dodecagonal quasicrystal that has been demonstrated in twisted bilayer graphene system in recent experiments. In the presence of small gap, we show the localization generically occurs due to non-periodic nature of quasicrystal, which is evidenced by the inverse participation ratio and the energy level statistics. We understand the origin of such localization by approximating the dodecagonal quasicrystals as an impurity scattering problem.
arXiv:1812.09170v1 fatcat:k5vlem3qhjghzjzblphsvjhlwu

Improved Feeder Flow Control Method for a Virtual Power Plant with Various Resources to Reduce Communication Dependency

Jae-Won Chang, Hee Seung Moon, Seung-Il Moon, Yong Tae Yoon, Mark B. Glick, Seung Wan Kim
2020 IEEE Access  
doi:10.1109/access.2020.3035867 fatcat:wp4y52fbhnc3vp7lxnsegqmpki

Assessment of Allergic Rhinitis Websites in Korea

Moon Young Chang, Doo Hee Han, Il Joon Moon, Seung-Tae Kim, Dong-Young Kim, Chul Hee Lee, Yang-Gi Min, Chae-Seo Rhee
2010 Clinical and Experimental Otorhinolaryngology  
There are many advantages to the internet such as easy accessibility and mutual communication, and so it has become an important source of information. In 2008, 1,600 million people world-wide and 35 million people in Korea were thought to have used the internet as an information resource (1, 2). There are currently over one million domains registered in Korea (2) and the number is increasing by the day. Likewise, the spread of medical information has been increasing through the internet. As a
more » ... esult, medical information that was previously difficult to access is now widely available to many people. However, the quality of the available medical information on these websites is still a matter of debate. As a result, web users have been warned of the possibility of receiving misleading or inaccurate medical information from websites (3). Indeed, many studies have been performed to assess the quality of the medical Objectives. The internet has become an important source of medical information and a great amount of information related to allergic rhinitis (AR) is available on the internet. However, the quality of this information is still a matter of debate. Therefore, this study was conducted to assess the AR-related information on Korean websites.
doi:10.3342/ceo.2010.3.1.32 pmid:20379400 pmcid:PMC2848316 fatcat:usagielxofe3fasm5sv523k64y

Stepwise Current Increment Sintering of Silver Nanoparticle Structures

Dongkeun Kim, Arif Hussain, Hee-Lak Lee, Yoon-Jae Moon, Junyoung Hwang, Seung-Jae Moon
2021 Crystals  
Owing to its unique properties, silver (Ag) in the form of nanoparticle (NP) ink promises to play a vital role in the development of printed and flexible electronics. Once printed, metal NP inks require a thermal treatment process called sintering to render them conductive. Among the various methods, electrical sintering is a highly selective and rapid sintering method. Here, we studied the electrical sintering of inkjet-printed Ag NP lines via a stepwise current increment sintering (SCIS)
more » ... ique. In the SCIS technique, the supplied electric current was gradually increased in multiple steps from low electric currents to higher electric currents to avoid thermal damage to the printed Ag NP ink lines. In less than 0.15 s, a line resistivity as low as 6.8 μΩcm was obtained which was comparable with furnace sintered line resistivity of 6.13 μΩcm obtained at 250 °C in 600 s. Furthermore, a numerical model was developed for the SCIS process temperature estimation. The results enabled us to elaborate on the relationship between the Ag NP line resistivity and the process temperature under various electric currents. Under the applied SCIS technique, a stable sintering process was carried out avoiding the conductive ink line and substrate damage.
doi:10.3390/cryst11101264 fatcat:qy636leawjgh7b5ryu5lkecmpe

Thrombocytopenia in Systemic Lupus Erythematosus

Jin-Hee Jung, Moon-Seung Soh, Young-Hwan Ahn, Yoo-Jin Um, Ju-Yang Jung, Chang-Hee Suh, Hyoun-Ah Kim
2016 Medicine  
The aim of the study was to examine the clinical characteristics and prognosis according to severity of thrombocytopenia and response to treatment for thrombocytopenia in patients with systemic lupus erythematosus (SLE). We retrospectively evaluated 230 SLE patients with thrombocytopenia, and reviewed their clinical data and laboratory findings. Thrombocytopenia was defined as platelet counts under 100,000/mm 3 , and patients were divided into 3 thrombocytopenia groups according to severity:
more » ... d (platelet counts >50,000/mm 3 ), moderate (>20,000/ mm 3 , 50,000/mm 3 ), and severe ( 20,000/mm 3 ). Clinical characteristics, treatments, and prognoses were compared among the groups. Furthermore, complete remission of thrombocytopenia was defined as platelet counts >100,000/mm 3 after treatment. There was no significant difference in clinical or laboratory findings among the groups according to severity of thrombocytopenia. However, hemorrhagic complications were more frequent in severe thrombocytopenia (P < 0.001) and mortality was also higher (P ¼ 0.001). Complete remission was achieved in 85.2% of patients. The clinical characteristics and modality of treatment did not differ between the patients with and without complete remission. Mortality in patients with complete remission (1.5%) was significantly lower than in those without complete remission (29.4%, P < 0.001). Survival was significantly higher in patients with complete remission from thrombocytopenia (odds ratio ¼ 0.049, 95% confidence interval: 0.013-0.191, P < 0.001). The severity of thrombocytopenia in SLE patients can be a useful independent prognostic factor to predict survival. Moreover, complete remission of thrombocytopenia after treatment is an important prognostic factor. The severity of thrombocytopenia and response to treatment should be closely monitored to predict prognosis in SLE patients. (Medicine 95(6):e2818) Abbreviations: ACR = American College of Rheumatology, ANA = antinuclear antibodies, anti-dsDNA = anti-double-stranded DNA, C3 = complement 3, C4 = complement 4, CI = confidence interval, SLE = Systemic lupus erythematosus, SLEDAI = systemic lupus erythematosus disease activity index. Editor: Worawit Louthrenoo.
doi:10.1097/md.0000000000002818 pmid:26871854 pmcid:PMC4753950 fatcat:cazn7d73k5hs5k2nt4adyktjva

Sample-Efficient Training of Robotic Guide Using Human Path Prediction Network [article]

Hee-Seung Moon, Jiwon Seo
2020 arXiv   pre-print
Training a robot that engages with people is challenging, because it is expensive to involve people in a robot training process requiring numerous data samples. This paper proposes a human path prediction network (HPPN) and an evolution strategy-based robot training method using virtual human movements generated by the HPPN, which compensates for this sample inefficiency problem. We applied the proposed method to the training of a robotic guide for visually impaired people, which was designed
more » ... collect multimodal human response data and reflect such data when selecting the robot's actions. We collected 1,507 real-world episodes for training the HPPN and then generated over 100,000 virtual episodes for training the robot policy. User test results indicate that our trained robot accurately guides blindfolded participants along a goal path. In addition, by the designed reward to pursue both guidance accuracy and human comfort during the robot policy training process, our robot leads to improved smoothness in human motion while maintaining the accuracy of the guidance. This sample-efficient training method is expected to be widely applicable to all robots and computing machinery that physically interact with humans.
arXiv:2008.05054v1 fatcat:skzlgyjo7za2pakbqhs7zmqqnm

Factors Influencing on Sexual Assertiveness of College Students

Young Hee Kim, Seung Tae Moon, Hee Sun Kang
2013 Yeoseong Geon-gang Ganho Hakoeji  
Purpose: The purpose of this study was to identify the factors influencing sexual assertiveness in dating college students. Methods: With a cross-sectional survey design, 468 college students who have had dating experiences were recruited and answered questionnaires. Data were analyzed using t-test, ANOVA with Scheffe? test, Pearson's correlation coefficients, and multiple regression. Results: The sexual assertiveness of college students showed significant results: positive correlations with
more » ... f-assertiveness and negative correlations with traditional sexual attitude, gender role stereotypes. Significant predictors of sexual assertiveness were traditional sexual attitude, gender role stereotypes, and self-assertiveness. These variables explained 37% of the variance in sexual assertiveness. Conclusion: Findings suggest that it is important to identify and improve communication patterns in relation to sexual assertiveness. There is a need for sex education programs for college students that are relevant and effective.
doi:10.4069/kjwhn.2013.19.3.166 fatcat:np3eteinejabbl6own3s7spvxa

MRI of Intraspinal Cysticercosis

Seung Cheol Kim, Moon Hee Han, Kee Hyun Chang, Gi Seok Han, Hee Young Hwang
1995 Journal of the Korean Radiological Society  
Purpose ; To describethe MR features of intraspinal cysticercosis. Materials and Methods ; Medical records and MR images of four cases of intraspinal cysticercosis were retrospectively reviewed. The MR findings were described with regard to the location and signal intensity of the lesions, contrast enhancement, presence or absence of associated intracranial cysticerci , and otherfindings. Results ; There were three cases of subarachnoidal form and one case of intramedullary form. Cysticerci of
more » ... ubarachnoidal form in three cases were located i n retromedu lI ary space at C2 level, anterior to cord at C1 -C6 levels, and lumbosacral area , respectively. The signal intensities of the lesions were same as those of CSF. Localized arachnoidal enhancement wasfound in all three cases.ln one case there was a large area of high signal intensity with i n the spinal cord on T2 -weighted image suggesting either ischemia secondary to vascular compromise or inflammatory edema . AII of these three cases accompanied intracranial cysticercosis . lntramedullary cysticercosis in onecase wasshown as a single 1 cm cystic lesion at C2 level, which showed hypointense signal on T1 -weighted image, hyperintense signal on T2 -weighted image, and signet -ring -like enhancement. This lesion did not accompany intracranial cysticerci. Conclusion; Intraspinal cysticercosis manifested as single or multiple cysts within either spinal cord or subarachnoid space, and were frequently associated with arachnoiditis.
doi:10.3348/jkrs.1995.32.1.33 fatcat:6yex4mn4sfa35mmjr4vsjjok2q

Effects of Voluntary Running Wheel Exercise-Induced Extracellular Vesicles on Anxiety

Kyeong Jin Yoon, Suhong Park, Seung Hee Kwak, Hyo Youl Moon, Hyo Youl Moon, Hyo Youl Moon
2021 Frontiers in Molecular Neuroscience  
Also, Exerciseinduced extracellular derivatives enhanced neural maturation (Moon et al., 2020) .  ...  Two weeks of treadmill exercise changed the EVs miRNA profile to favor neural maturation (Moon et al., 2020) .  ... 
doi:10.3389/fnmol.2021.665800 doaj:6b62fb480d734d0a8694bbc91652b7df fatcat:cythyaptvfdzzcryfuwpderxnq

Cellular Inhibitor of Apoptosis Protein 1 (cIAP1) Stability Contributes to YM155 Resistance in Human Gastric Cancer Cells

Soo-A Jung, Yong-Man Park, Seung-Woo Hong, Jai-Hee Moon, Jae-Sik Shin, Ha-Reum Lee, Seung-Hee Ha, Dae-Hee Lee, Jeong Hee Kim, Seung-Mi Kim, Jeong Eun Kim, Kyu-pyo Kim (+5 others)
2015 Journal of Biological Chemistry  
YM155, a survivin suppressant, has been shown anticancer efficacy in various cancer cells. Results: Human gastric cancer cells differentially displayed the sensitivity to YM155 dependent to degradation of cIAP1. Conclusion: Cellular inhibitor of apoptosis protein 1 (cIAP1) interacts with survivin to control their mutual stability and determine sensitivity to YM155. Significance: The regulation of cIAP1 enhances the efficacy for YM155 treatment in gastric cancer. Downloaded from 4 The
more » ... ns used are: cIAP1, cellular inhibitor of apoptosis protein 1; IAP, inhibitor of apoptosis protein; BIR, baculovirus IAP repeat; XIAP, X-linked inhibitor of apoptosis.
doi:10.1074/jbc.m114.600874 pmid:25635055 pmcid:PMC4400372 fatcat:hwcwtiwrzneyll2c4lxpe27txy

Cerebral aspergillosis in immunologically competent patients

Dong Gyu Kim, Seung Chyul Hong, Hyun Jib Kim, Je G. Chi, Moon Hee Han, Kil Soo Choi, Dae Hee Han
1993 Surgical Neurology  
Aspergillosis of the central nervous system is a rare disease, especially if the patient's immune system is not compromised . The authors report three cases of cerebral aspergillosis in the immunocompetent state : a rhinocerebral form in a diabetic patient, a direct extension from chronic As-pergiRus otitis media, and a postoperative AspergiUus brain abscess after brain tumor surgery . In spite of the poor prognosis of cerebral aspergillosis, two of the patients survived . The pathogenesis,
more » ... isposing factors, radiologic findings including magnetic resonance image, and the outcome are presented . The pertinent literature of cerebral aspergillosis is also reviewed .
doi:10.1016/0090-3019(93)90145-q pmid:8211644 fatcat:zxklb35rtza35irsthshrpkh4q

Vein of Galen Aneurysmal Malformation : Endovascular Management of 6 Cases in a Single Institute

Jung Hyeon Moon, Won-Sang Cho, Hyun-Seung Kang, Jeong Eun Kim, Seung Jin Lee, Moon Hee Han
2011 Journal of Korean Neurosurgical Society  
doi:10.3340/jkns.2011.50.3.191 pmid:22102947 pmcid:PMC3218176 fatcat:k2co7ie4drao5kntesl2qfin44

Retinal Hemorrhage in Plasmodium vivax Malaria

Ji Hwan Lee, Moon-Hyun Chung, Hee Seung Chin, Yeon Sook Moon
2010 American Journal of Tropical Medicine and Hygiene  
Case Report: Retinal Hemorrhage in Plasmodium vivax Malaria Ji Hwan Lee , Hee Seung Chin , * Moon-Hyun Chung , and Yeon Sook Moon Department of Ophthalmology, Yonsei University College of Medicine, Seoul  ... 
doi:10.4269/ajtmh.2010.09-0439 pmid:20133995 pmcid:PMC2813160 fatcat:rn3ol5ysnbf3ri2cakkv65ydvq

A Study Of Efficiency And Prioritize Of Eurasian Logistics Network

Ji-Young Song, Moon-Shuk Song, Hee-Seung Na
2011 Zenodo  
Song, Hee-Seung Na A Study of Efficiency and Prioritize of Eurasian Logistics Network M World Academy of Science, Engineering and Technology International Journal of Economics and Management Engineering  ...  Import 39,808 47,532 51,072 62,578 70,742 76,898 Total 135,42 173,90 208,95 253,73 300,30 323,24 Source : Korea International Trade Association Unit: million € Ji-Young Song, Moon-Shuk  ... 
doi:10.5281/zenodo.1071684 fatcat:srqwwwh7qndbxnkiri5qu5qdvy
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