One-Hot LSTM Pooling with IDF Attention for Information Filtering

Saly Sin(신사리),Seung-Hoon Na(나승훈) 한국정보과학회 2017 한국정보과학회 학술발표논문집 Vol.2017 No.06

Psychological Stress and Atopic Dermatitis: A Focus Group Study

Louise Lönndahl,Saly Abdelhadi,Mikael Holst,Sol-Britt Lonne-Rahm,Klas Nordlind,Björn Johansson 대한피부과학회 2023 Annals of Dermatology Vol.35 No.5

Background: Atopic dermatitis (AD) is a chronic inflammatory skin disorder. It is often reported to be worsened by psychological stress. Objective: To explore the role of psychological stress and related triggers in AD, and its connection to worsening of this disease, focusing on patients’ perspectives. Methods: In total, 28 patients with AD were included in focus groups. Topics regarding psychological stress and psychological triggers were discussed. Results: The hypothesis that psychological stress may have impact on eczema and its pruritus was supported by all of the patients. Distinguishing the worsening effect of psychological stress from effects of physiological triggers, such as infection, climate and allergic factors, was claimed to be difficult by many patients. Most of the patients thought that chronic stress affected the AD more when compared to acute stress. Family problems, financial problems, work overload, school exam periods, lack of structure at work, and unforeseen events were identified as important psychological triggers. Conventional treatment/therapy with topical corticosteroids and emollients, UV light treatment, were suggested as possible treatments, as well as psychological intervention and physical exercise. Conclusion: Psychological stress is an important factor to consider in the management of patients with AD. In particular, chronic stress tends to worsen AD. The type of stress can possibly also affect the quality of the pruritus experienced by the patients. Unforeseen events and decision making were frequently mentioned as important triggers. Furthermore, physical exercise was reported to provide beneficial effects.

Abandoned, Lost and Discarded Fishing Gear from the Fishing Sector of Kerala, India

Damaris Benny Daniel,Saly N. Thomas 한국해양과학기술원 2022 Ocean science journal Vol.57 No.3

Abandoned, lost or otherwise discarded fishing gear (ALDFG) is rapidly becoming a major global environmental problem. In the present study, a survey of 390 fishermen operating ten different types of fishing gear was conducted, to get a quantitative estimate of ALDFG generated in the fishing intense coastal state of India (Kerala). On average, the total gear loss from 10 selected marine fishing gears operated in Kerala was estimated to be 167.5 ± 251.7 kg.vessel−1 year−1. Fishing crews reported that each year, 11.6% of the total gear used is lost, 7.5% is abandoned, and 2.3% is discarded. There was significant variation in the ALDFG incurred regarding different types of fishing gears. Motorized large mesh ring seine recorded the highest gear loss (35.5%), followed by motorized small mesh ring seine (29.7%), mini trawl (27.4%), trammel net (24.4%), motorized gillnet (18.75%), non-motorized gillnet (16.3%), small trawl (14.6%), large trawl (12.07%), medium trawl (11.25%) and shore seine (0.32%). The ALDFG estimates and associated trends worked out in the current study can assist filling in data gaps about fishing gear loss and aid in the design of strategies to manage marine debris from the fishing industry.

A Modified Charge Balancing Scheme for Cascaded H-Bridge Multilevel Inverter

Nithin Raj,Jagadanand G,Saly George 전력전자학회 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.6

Cascaded H-bridge multilevel inverters are currently used because it enables the integration of various sources, such as batteries, ultracapacitors, photovoltaic array and fuel cells in a single system. Conventional modulation schemes for multilevel inverters have concentrated mainly on the generation of a low harmonic output voltage, which results in less effective utilization of connected sources. Less effective utilization leads to a difference in the charging/discharging of sources, causing unsteady voltages over a long period of operation and a reduction in the lifetime of the sources. Hence, a charge balance control scheme has to be incorporated along with the modulation scheme to overcome these issues. In this paper, a new approach for charge balancing in symmetric cascaded H-bridge multilevel inverter that enables almost 100% charge balancing of sources is presented. The proposed method achieves charge balancing without any additional stages or complex circuit or considerable computational requirement. The validity of the proposed method is verified through simulation and experiments.

Torque Estimation using Kalman Filter and Extended Kalman Filter Algorithms for a sensorless Direct Torque Controlled BLDC Motor drive: A Comparative Study

Nair Deepthi S,Jagadanand G.,George Saly 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.5

Torque estimation for Direct Torque Controlled BLDC motor drive using Kalman Filter and Extended Kalman Filter are described in this paper. In conventional direct torque control method, the torque estimation is done based on the position information, which in turn requires position sensors for accurate estimation. In this paper, torque is directly estimated using Kalman fi lter and Extended Kalman Filter algorithms without the aid of any feedback information, and a comparison is made between the two. Both the algorithms are perceptive to follow the actual torque; the error between the actual and reference is used for the selection of appropriate voltage vector for inverter switching. The refl ection of load changes in the control algorithm is also a part of the interest in this work. The potential of Extended Kalman Filter to follow exactly the changes in the load torque is utilized here and Extended Kalman Filter based sensorless drive is proposed for the torque estimation in Direct Torque Controlled BLDC motor. The performance parameters, viz. computational eff ort, torque ripple reduction are found to be superior with the Extended Kalman Filter algorithm, which is validated.

A Modified Charge Balancing Scheme for Cascaded H-Bridge Multilevel Inverter

Raj, Nithin,G, Jagadanand,George, Saly The Korean Institute of Power Electronics 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.6

Cascaded H-bridge multilevel inverters are currently used because it enables the integration of various sources, such as batteries, ultracapacitors, photovoltaic array and fuel cells in a single system. Conventional modulation schemes for multilevel inverters have concentrated mainly on the generation of a low harmonic output voltage, which results in less effective utilization of connected sources. Less effective utilization leads to a difference in the charging/discharging of sources, causing unsteady voltages over a long period of operation and a reduction in the lifetime of the sources. Hence, a charge balance control scheme has to be incorporated along with the modulation scheme to overcome these issues. In this paper, a new approach for charge balancing in symmetric cascaded H-bridge multilevel inverter that enables almost 100% charge balancing of sources is presented. The proposed method achieves charge balancing without any additional stages or complex circuit or considerable computational requirement. The validity of the proposed method is verified through simulation and experiments.

One cycle controlled three input three output DC to DC converter

P. Hema Rani,Arun Kumar Behera,Syam S. Sundar,Saly George,S. Ashok 전력전자학회 2022 JOURNAL OF POWER ELECTRONICS Vol.22 No.1

A single renewable source is insufficient for providing a reliable and continuous power supply. The multi-input DC to DC converter (MIDC) provides for the hybridization of different energy sources with a single output. Various grid voltages exist and different applications require different DC voltages. If the MIDC provides multiple outputs, it becomes a multi-input multi-output (MIMO) converter. In this paper, a triple input triple output (TITO) DC–DC buck-boost converter is proposed for voltage regulation and power management. It combines the feature of multi-input and multi-output. The proposed converter consists of only one inductor, which reduces the number of active elements. A control circuit with a one-cycle control strategy is proposed to achieve this objective. A fixed ratio power management strategy is proposed for power management. The rising edge synchronization PWM method is realized as a suitable switching strategy for the converter. To design the compensator for the converter control system, a small signal model of the converter is developed. A PI controller is used to regulate the output voltage and the one cycle control (OCC) technique is used for current control. The operating characteristics of the proposed converters are validated by hardware results obtained from an Opal-RT real-time simulator.

Raskols and Crime in Lae, Papua New Guinea, Thwarting Sustainable Development

Sali, Garry 아시아교정포럼 2015 교정담론 Vol.9 No.2

이 논문은 파푸아뉴기니의 레이시(市)의 범죄와 ‘라스콜(raskol)’ 갱단의 활동 2012년에서 2013년까지 분석하였다. 이 논문은 레이시(市)에서 라스콜에 의해 발생한 범죄를 연구하였다. 총 68명의 라스콜 단원이 눈덩이표집(snowball sampling method)을 사용하여 선정되었다. 수집된 데이터에 따르면 라스콜 단원들은 젊고 학업수준이 낮은 단원만 있는 것이 아닌, 중·고등교육을 받은 성인단원도 있었다. 조사된 라스콜 단원들은 레이시(市) 전 지역에 분포하여 살인, 성폭행, 무장 강도 등 다양한 범죄를 저지르고 있었다. 흥미로운 점은 라스콜 단원들이 소수의 현직 경찰관들의 도움을 받고 있으며 심지어 권총도 지원을 받고 있었다. 이는 라스콜 단원들이 일반 시민들처럼 지역사회에 기반을 두는 소외된 사람들이고 어쩔 수 없이 범죄를 저지르고 있음을 나타낸다. 따라서 레이시(市)의 범죄율을 줄이기 위해서는 가난, 실직, 형사사법부의 무능과 부정부패를 치료해야할 필요가 있다. 파푸아뉴기니 정부가 이러한 문제점들에 대해 적극적으로 대응하지 않는 한, 인구 148,000이 넘는 레이시(市)의 미래는 지속가능하지 못할 것이다. This study on ‘raskols’ (rascals) and crime in Lae, Papua New Guinea (PNG) was conducted between 2012 and 2013. The aim of the study is to examine the occurrences of crime in Lae committed by the raskols. There were a total of 68 raskols who participated in this research (identified through a snowball sampling method). The data collected was analyzed and it revealed that these raskols are not only young and lowly educated, but also adults who have completed secondary and tertiary education in PNG. Both demographics belong to raskol groups which are widely spread over the entire city of Lae; they have been responsible for committing all range of serious crimes including murder, rape, and armed robberies. Ironically, it is interesting to note that these raskols and their criminal activities in Lae are being supported by a minority of law officers, a few of whom even supply firearms to equip and aid the thugs’ criminal acts. It is concluded that the raskols are from the same community that law abiding citizens dwell within, but because of socio-economic hardship, they are marginalized and forced to commit crime. Therefore, it is important to properly deal with dysfunctional issues like poverty, unemployment, ineffective criminal justice system, and corruption in our efforts to minimize crime in Lae. Unless the PNG Government makes rigorous and committed efforts to seriously address these dysfunctional issues appropriately, raskol and crime problems in Lae will continue to thwart sustainable development in this key city with over 148,000 people.

Identity, Conflict and Multiculturalism: Living Together in Cultural Freedom

Augustine Sali 서강대학교 생명문화연구소 2011 생명연구 Vol.21 No.-

A strong‐ and exclusive‐sense of belonging to one group can in many ways carry with it the perception of distance and divergence from other group. Many contemporary political and social issues revolve around conflicting claims of disparate identities involving different groups, since the conception of identity influences in many different ways, our thoughts and actions. As a result of intensifying global migrations, the world becomes increasingly a place of multi‐ethnic states, with up to 30% of the population coming from other societies, western liberal democracies started describing themselves as multicultural societies. Even counties which had traditionally been known as fiercely homogeneous, such as Korea and Japan, could no longer avoid acknowledging the ethnic and racial diversification of their populations. On the other hand culturally diverse societies are trying to emphasize a strong national identity. In this context, looking into the experience of India’s cultural nationalism, state multiculturalism of Europe, this paper tries to reflect on the concept of ‘solitarist belittling’ of human identity and its far‐reaching consequences and the need of an ‘inter and intra cultural civic engagement’, to cultivate an idea of ‘collectivity of humans’.

Papua New Guinea State University Students in Conflict with Social Morality and the Rule of Law

Garry Sali 아시아교정포럼 2017 교정담론 Vol.11 No.1

This paper examines the students’ criminal and deviant behaviors including violence at the Papua New Guinea (PNG) state universities, and attempts to connect how young students are usually in conflict with both the social morals and the criminal laws of PNG. Using the author’s own observations of campus crime and deviance as a student for six years (1987-1992) at the University of Papua New Guinea (UPNG) and then as an academic for 15 years at both UPNG (1997-2001) and Papua New Guinea University of Technology (PNGUoT) (2007–current) plus relevant literature reviews and anecdotal evidences available through the various media channels, this paper presents an explicit accounts of the occurrence, character and magnitude of the student conflicts at the PNG state universities. In the discussion, the paper carefully draws attention to how the students at the state universities break social mores and state and university laws. The paper maintains that the student conflicts at the state universities are not only an isolated university problem but a product of a broader and complex socio-economic, cultural, and political dynamics in a rapidly evolving society. The state universities should learn to accept that student conflicts have existed on their campuses for many years and these problems cannot be eradicated overnight. However, the key point maintained throughout this discussion is that because human behaviors are flexible, students are capable and have the ability of changing their attitudes (mindsets) and behaviors responding to sets of strong rules and incentives. It is, therefore, concluded that the state universities need to carefully work towards developing a clear road-map that targets not only students’ behavioral problems but establish capacities that help students to change and shift their mindsets as well. At the core of this drive, a long-term positive institutional culture based on the key virtues of respect, tolerance, responsibility, and obedience to legitimate authority, is to be harnessed through collective, committed, and sustained efforts.