ASEAN, COVID-19 and Myanmar crisis: Dealing with critical juncture

Wicaksana I Gede Wahyu,Nauvarian Demas,Pramudia Putu Shangrina 한국외국어대학교 국제지역연구센터 2023 International Area Studies Review Vol.26 No.1

Explaining how international institutions develop is the significant contribution of historical institutionalism (HI) to the study of contemporary world politics. HI offers two important concepts, critical juncture and path dependence, demonstrating dynamics within the institution, leading towards continuity and change. The case of the Association of Southeast Asian Nations (ASEAN) during the COVID-19 pandemic and the Myanmar democratic crisis tells us about the impact of the crucial moments on the regional organisation and its responses. Yet, ASEAN is resistant to change. What makes it possible is the question that cannot be answered by using the HI approach. Hence, we explain by employing a theoretical framework founded upon the link between diplomatic culture and institutional legitimacy, adopted from the English School (ES) theory of International Relations (IR). This article argues that ASEAN's diplomatic culture ensures member countrie’s compliance with the Association's code of conduct and prevents external power intrusion into Southeast Asian affairs and interests. Therefore, ASEAN's institutional legitimacy can be maintained. The Association deals with the critical juncture without undertaking any fundamental change.

Mechanical behaviour of rock subjected to uniaxial compression at intermediate strain rate

Wicaksana Yudhidya,전석원 한국자원공학회 2020 Geosystem engineering Vol.23 No.5

This paper presents a study of the mechanical behaviour of rock under dynamic compression loading at intermediate strain rate (ISR). A series of laboratory tests were carried out to obtain dynamic uniaxial compressive strength by using a non-explosive powder reaction loading apparatus that was able to generate loading in the ISR range. It was found that the strength of granite and sandstone specimens increases at the ISR range. The results were discussed with a comparison with other findings from multiple references. In general, strength increases linearly at the lower rates and rises significantly at higher rates. Within the ISR range, the tendency is not consistent. Further understanding of rock behaviour within the ISR range needs to be extensively explored. This paper might be useful to understand phenomena involving a dynamic process such as mechanical excavation in which rock experiences a loading lower than high strain rate, i.e., explosive blasting, and higher than static loading.

Decode-and-Forward Two-Path Half-Duplex Relaying: Diversity-Multiplexing Tradeoff Analysis

Wicaksana, H.,Ting, S. H.,Guan, Y. L.,Xia, X.-G IEEE 2011 IEEE TRANSACTIONS ON COMMUNICATIONS Vol.59 No.7

<P>Two-path or successive relaying has recently emerged as a promising cooperative communication protocol to improve spectral efficiency in half-duplex relaying networks. In this paper, we consider decode-and-forward (DF) version of the two-path relaying protocol. We analyze the fundamental performance of this protocol in terms of the diversity-multiplexing tradeoff (DMT). We first derive the DMT for this protocol, where perfect decoding at the relays is assumed, and show that it approaches the 3 x 1 multiple-input single-output (MISO) DMT. We then remove the assumption of perfect decoding at the relays and derive the closed-form expression of the achievable DMT based on the relative distances between nodes. Specifically, we found that for sufficiently long transmission length, if the average source-relay SNR is at least 2.5 times (measured in dB) of other links, the 3 x 1 MISO DMT is achieved. Successive interference cancellation at the relays is also proposed to further improve the performance of the DMT.</P>

Hybrid Multi–System-on-Chip Architecture as a Rapid Development Approach for a High-Flexibility System

Rachmad Vidya Wicaksana Putra,Trio Adiono 대한전자공학회 2016 IEIE Transactions on Smart Processing & Computing Vol.5 No.1

In this paper, we propose a hybrid multi–system-on-chip (H-MSoC) architecture that provides a high-flexibility system in a rapid development time. The H-MSoC approach provides a flexible system-on-chip (SoC) architecture that is easy to configure for physical- and applicationlayer development. The physical- and application-layer aspects are dynamically designed and modified; hence, it is important to consider a design methodology that supports rapid SoC development. Physical layer development refers to intellectual property cores or other modular hardware (HW) development, while application layer development refers to user interface or application software (SW) development. H-MSoC is built from multi-SoC architectures in which each SoC is localized and specified based on its development focus, either physical or application (hybrid). Physical HW development SoC is referred to as physical-SoC (Phy-SoC) and application SW development SoC is referred to as application-SoC (App-SoC). Phy-SoC and App-SoC are connected to each other via Ethernet. Ethernet was chosen because of its flexibility, high speed, and easy configuration. For prototyping, we used a LEON3 SoC as the Phy-SoC and a ZYNQ-7000 SoC as the App-SoC. The proposed design was proven in real-time tests and achieved good performance.

Indonesia s maritime connectivity development domestic and international challenges

Gede Wahyu Wicaksana 서울대학교행정대학원 2017 Asian Journal of Political Science Vol.25 No.2

This study considers the political aspects of the Joko Widodo government’s megaproject to build an integrated marine logistic system known as the tol laut. Expanding the existing literature which gives details about the contextual obstacles faced by and the prospects for the Indonesian government to pursue its infrastructure ambitions, the study argues that notwithstanding the relevance of the tol laut for advancing the Indonesian economy, it is inevitably entangled with dynamic internal and external environments which can unfavourably distort the construction processes. This is the way of understanding the political economy of Indonesia’s development issues which allows for the juxtaposition of domestic political and international relations factors as its framework of analysis. The discussion is divided into four sections. Section one explains the conceptual and methodological foundation of the study. Section two outlines the importance of the tol laut to Indonesian national economic development. Section three looks at how the current domestic political settings pose structural hurdles to Widodo’s tol laut, and section four observes the effect of international relations of powerful regional actors and Jakarta’s diplomatic capacity to the on-going tol laut. The concluding section summarizes the findings of the study

Psychometric Testing of the Indonesian Version of Dietary SodiumRestriction Questionnaire Among Patients with Hypertension

Anggi Lukman Wicaksana,Shan-Tair Wangang 한국간호과학회 2018 Asian Nursing Research Vol.12 No.4

Purpose: The purpose of this research was to test the validity and reliability of the Indonesian version of the Dietary Sodium Restriction Questionnaire (DSRQ-I) among patients with hypertension. Methods: The cross-sectional study enrolled hypertensive patients from a cardiac outpatient department in Indonesia using convenience sampling. Eligible patients received a demographic questionnaire and DSRQ-I during a one-month period of data collection. Content and construct analysis examined the validity, whereas internal consistency assessment checked reliability. Participation required 10-15 minutes on average. Results: One hundred thirty-five patients participated: mostly females (54.1%) and married (82.9%) with mean age of 58.18 ± 10.44 years. The item of content validity index was .97, and subscale content validity index was .81 for DSRQ-I. The KaisereMeyereOlkin test gave a value of .83, indicating adequate sampling, and the Bartlett's test of sphericity reached significant result (p < .001). The principal component analysis indicated three components, with 64.2% explaining variance, including perceived behavioral control (35.5%), attitude (19.3%), and subjective norm (9.4%). Confirmatory factor analysis produced a parsimonious model on the three-factor outcome by removing a single item. The indices of good fit model was achieved at x2/df = 2.17, goodness fit index = .85, root mean square error of approximation = .09, standardized root mean square means = .07, and Bentler comparative fit index = .90 (p < .001). Cronbach's alpha coefficients for attitude, subjective norm, and perceived behavioral control were .85, .87, and .85, respectively. All interitem and item-total correlations indicated adequate outcome and acceptable result. Consequently, 15 items were determined reliable measurement and included in the final version of DSRQ-I. Conclusion: The DSRQ-I is a valid and reliable instrument to measure facilitators and barrier of sodium restriction among hypertensive patients in Indonesia.

The family state: a non-realist approach to understanding Indonesia’s foreign policy

I Gede Wahyu Wicaksana 서울대학교행정대학원 2019 Asian Journal of Political Science Vol.27 No.3

The existing literature on Indonesia’s foreign policy has excluded the state from the category of an agent which shapes the country’s external affairs. This trend certainly ignores the notion that foreign policy is a unique state activity taking place in the interface between domestic and international politics. To fill the gap, this article explores the idea about the family state and looks at its influence on the conduct of Indonesia’s international relations. The argument is that the family state pursues order in international society in which sovereignty can be maintained. Indonesia plays the role of an order-maker in Southeast Asia through the Association of South East Asian Nations (ASEAN). The order-oriented actions are displayed by Jakarta’s diplomacy to resolve border disputes with neighbouring countries in the region.

구동형 언더커팅 디스크의 절삭효율 평가

정호영,Yudhidya Wicaksana,김세훈,전석원 사단법인 한국터널지하공간학회 2021 한국터널지하공간학회논문집 Vol.23 No.3

Alternative methods of rock cutting have been introduced to substitute and to improve the traditional mechanical rock excavation methods (e.g., TBM and roadheader). Undercutting methods have been recently studied in some countries. In undercutting, several additional cutting parameters are involved in its cutting process compared tothe traditional rock-cutting. As a fundamental study, this paper introduces the concept of undercutting method with actuated disc, lab-scaled testing system, and testing procedures of undercutting by the system. Also, we present the calculation methods of cutter forces and specific energy, and discuss the results of undercutting tests compared to those of traditional rock-cutting methods. TBM과 로드헤더로 대표되는 기존의 기계화 암반굴착방식을 보완하고 대체하기 위한 새로운 개념의 암석절삭기법들이 연구되어오고 있다. 이러한 기법들 중 언더커팅 방식은 최근에 연구가 수행되고 있는 방식이다. 언더커팅에서는 기존의 전통적인 암석절삭 방식과 비교하여 보다 많은 절삭변수들이 암석의 절삭메커니즘에 관여한다. 본 논문은 이에 대한 기초연구로 수행되었으며, 언더커팅이 적용된 구동형 디스크, 실험실 스케일의 절삭시험시스템, 시험 방법에 대하여 소개하였다. 또한 본 논문에서 소개된 절삭시험시스템을 이용하여 구동형 언더커팅 디스크의 절삭력을 통해 비에너지를 계산하는 방법을 소개하였으며, 그 결과를 전통적인 암석절삭방식과 비교하여 분석하였다.

Modification of a Density-Based Spatial Clustering Algorithm for Applications with Noise for Data Reduction in Intrusion Detection Systems

Wiharto,Aditya K. Wicaksana,Denis E. Cahyani 한국지능시스템학회 2021 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.21 No.2

Monitoring activity in computer networks is required to detect anomalous activities. This monitoring model is known as an intrusion detection system (IDS). Most IDS model developments are based on machine learning. The development of this model requires activity data in the network, either normal or anomalous, in sufficient amounts. The amount of available data also has an impact on the slow learning process in the IDS system, with the resulting performance sometimes not being proportional to the amount of data. This study proposes an IDS model that combines DBSCAN modification with the CART algorithm. DBSCAN modification is performed to reduce data by adding a MinNeighborhood parameter, which is used to determine the distance of the density to the cluster center point, which will then be marked for deletion. The test results, using the Kaggle and KDDCup99 datasets, show that the proposed system model is able to maintain a classification accuracy above 90% for 80% data reduction. This performance was also followed by a decrease in computation time, for the Kaggle dataset from 91.8 ms to 31.1 ms, while for the KDDCup99 dataset from 5.535 seconds to 1.120 seconds.

Influence of Hold Time and Stress Ratio on Cyclic Creep Properties Under Controlled Tension Loading Cycles of Grade 91 Steel

김우곤,박재영,I Made Wicaksana Ekaputra,김선진,장진성 한국원자력학회 2017 Nuclear Engineering and Technology Vol.49 No.3

Influences of hold time and stress ratio on cyclic creep properties of Grade 91 steel were systemically investigated using a wide range of cyclic creep tests, which were performed with hold times (HTs) of 1 minute, 3 minutes, 5 minutes, 10 minutes, 20 minutes, and 30 minutes and stress ratios (R) of 0.5, 0.8, 0.85, 0.90, and 0.95 under tension loading cycles at 600℃. Under the influence of HT, the rupture time increased to HT = 5 minutes at R = 0.90 and R = 0.95, but there was no influence at R = 0.50, 0.80, and 0.85. The creep rate was constant regardless of an increase in the HT, except for the case of HT = 5 minutes at R = 0.90 and R = 0.95. Under the influence of stress ratio, the rupture time increased with an increase in the stress ratio, but the creep rate decreased. The cyclic creep led to a reduction in the rupture time and an acceleration in the creep rate compared with the case of monotonic creep. Cyclic creep was found to depend dominantly on the stress ratio rather than on the HT. Fracture surfaces displayed transgranular fractures resulting from microvoid coalescence, and the amount of microvoids increased with an increase in the stress ratio. Enhanced coarsening of the precipitates in the cyclic creep test specimens was found under all conditions.