Sengketa Pulau Dokdo antara Jepang dan Korea Selatan

Dokdo Island\u27s dispute is a territorial dispute involving Japan and South Korea in the fight over an island located in the Sea of ​​Japan. Government of Japan and South Korea based their claim over Dokdo Island ownership on historical evidence and geographical connectivity. Dokdo Island\u27s dispute impede the process of negotiating maritime delimitation zone in the Sea of ​​Japan. It is necessary to immediately resolve the Dokdo Island dispute by setting limits of maritime zones Japan and South Korea, as well as provide legal certainty on the status of ownership of Dokdo Island. Claims to sovereignty over Dokdo Island is a core issue that must be resolved first. In an attempt to resolve the dispute Dokdo Island, the Government of Japan and South Korea have done several rounds of negotiations and did not find any way of settlement. Dokdo Island\u27s dispute resolution solutions can be made through the Joint Development Agreement, the settlement through diplomatic channels and settlement through legal channels. In order to avoid the dispute dragged on, the Government of Japan and South Korea should immediately take back the diplomatic negotiations in order to resolve Dokdo Island\u27s dispute

Sistem Informasi Manajemen Laporan Kegiatan Belajar Mengajar pada STMIK Bina Insani - Bekasi

Teaching and Learning Activities is one of the important processes in education. Educational success is largely influenced by a good learning process, planned and directed. One element of evaluation in the learning process is a system that can monitor the process.In this case, we need a system to be able to evaluate the application in the form of teaching and learning activities in which there is information about faculty, courses, days, hours, rooms, number of students, the principal language, sub subject and others. With this application, the evaluation of teaching and learning can be done effectively and efficiently. Keywords: application, evaluation, learning, system

Automatic Transformation of Natural to Unified Modeling Language: A Systematic Review

Context: Processing Software Requirement Specifications (SRS) manually takes a much longer time for requirement analysts in software engineering. Researchers have been working on making an automatic approach to ease this task. Most of the existing approaches require some intervention from an analyst or are challenging to use. Some automatic and semi-automatic approaches were developed based on heuristic rules or machine learning algorithms. However, there are various constraints to the existing approaches of UML generation, such as restriction on ambiguity, length or structure, anaphora, incompleteness, atomicity of input text, requirements of domain ontology, etc. Objective: This study aims to better understand the effectiveness of existing systems and provide a conceptual framework with further improvement guidelines. Method: We performed a systematic literature review (SLR). We conducted our study selection into two phases and selected 70 papers. We conducted quantitative and qualitative analyses by manually extracting information, cross-checking, and validating our findings. Result: We described the existing approaches and revealed the issues observed in these works. We identified and clustered both the limitations and benefits of selected articles. Conclusion: This research upholds the necessity of a common dataset and evaluation framework to extend the research consistently. It also describes the significance of natural language processing obstacles researchers face. In addition, it creates a path forward for future research

Improvement of Machinability of Mild Steel during Turning Operation by Magnetic Cutting

This paper presents the details of improvement of machinability of mild steel using magnetic cutting during turning operation. Improvement of machinability was evaluated in terms of tool life, surface roughness and chip morphology. Machine tool chatter is a type of intensive self-excited vibrations of individual components of Machine-Tool-Fixture-Work (MTFW) system. Chatter causes unwanted excessive vibratory motion in between the tool and the work-piece causing adverse effects on the product quality and machine-tool and tool life. In addition to the damage of the work-piece surface due to chatter marks, the occurrence of severe chatter results in many adverse effects, which include poor dimensional accuracy of the work-piece, reduction of tool life, and damage to the machine. Chatter is formed as resonance phenomena during machining because of the instability of the closed-loop system formed by machine tool structure and metal-cutting process. In this study, magnets were used to avoid the chatter formation zone and its effect on machinability was investigated. Improvements in tool life and surface finish were observed during magnetic cutting of the mild steel. An obvious change in the chip behaviour was also present. These observations further enhance the possibility of using this magnetic cutting to eliminate the chatter formation zones and hence eliminate the adverse effect of chatter on machinability

ANALISIS PENYEBAB TERJADINYA KEBOCORAN PADA ECONOMIZER SIDE DI COMPOSITE BOILER TYPE MV. PAN GLOBAL

ABSTRAKSI Arif Budi Utama, 2019, NIT : 52155704.T, “Analisis Penyebab Terjadinya Kebocoran Pada Economizer Side di Composite Boiler Type Mv. Pan Global”, skripsi Program Studi Teknika, Progran Diploma IV, Politeknik Ilmu Pelayaran Semarang, Pembimbing I: Abdi Seno, M.Si., M.Mar.E. dan Pembimbing II: Yustina Sapan S.ST., M.M. Economizer di composite boiler adalah suatu pesawat bantu diatas kapal yang berfungsi untuk memproduksi uap panas dengan tekanan lebih dari 1 bar atau 1 atmosfir yang digunakan untuk media pemanas bahan bakar, minyak lumas dan akomodasi lainnya di atas kapal. Economizer memanfaatkan panas dari gas buang mesin induk dalam proses produksi uap untuk menghemat penggunaan bahan bakar. Kebocoran pada economizer side di composite boiler menyebabkan gangguan pada proses produksi uap di atas kapal. Jenis metode penelitian yang penulis gunakan dalam penyusunan skripsi ini adalah deskriptif kualitaf dengan menggunakan pendekatan fault tree analysis (FTA) untuk mempermudah dalam teknik analisis data. Penulis juga menggunakan metode pengumpulan data yang penulis lakukan adalah dengan cara observasi, dokumentasi dan wawancara untuk memperkuat dalam analisis data. Tujuan dari penelitian ini adalah untuk mengetahui faktor penyebab kebocoran pada economizer side di composite boiler type, dampak dari faktor penyebab kebocoran pada economizer side di composite boiler type dan upaya yang dilakukan untuk mencegah faktor penyebab kebocoran pada economizer side di composite boiler type Mv. Pan Global. Berdasarkan hasil penelitian penulis, dapat disimpulkan bahwa faktor penyebab kebocoran pada economizer side di composite boiler type MV. Pan Global adalah, 1) Kandungan air economizer boiler kurang sesuai yang dapat disebabkan oleh kondisi air keruh/kotor, tingginya kandungan chloride/klorida dan rendahnya nilai pH. 2) Lamanya usia pipa economizer boiler. 3) Tekanan uap berlebih pada economizer boiler. Dampak yang ditimbulkan adalah 1) Endapan kotoran pada economizer boiler, kerak/scale pada economizer tube dan korosi pada economizer boiler. 2) Melemahnya konstruksi economizer boiler. 3) Pressure stress pada economizer boiler. Untuk mencegah faktor-faktor penyebab kebocoran economizer upaya yang harus dilakukan adalah dengan, 1) Penggantian cascade filter. 2) Pemberian BWT (Boiler Water Treatment). 3) Chemical treatment dan rutin melakukan blowdown. ABSTRACT Arif Budi Utama, 2019, NIT: 52155704.T, "Analysis the Causes of Leakage at Economizer Side at Composite Boiler Type MV. Pan Global", Thesis Study Program, Diploma IV Program, Semarang Shipping Science Polytechnic, Advisor I: Abdi Seno, M.Sc., M.Mar.E. and Advisor II: Yustina Sapan S.ST., M.M. Economizer in a composite boiler is an auxiliary engine on a ship that functions to produce high temperature steam with a pressure of more than 1 bar or 1 atmosphere that is used for fuel heating media, lubricating oil and other accommodations on board. Economizer utilizes heat from the main engine exhaust gas in the steam production process to save fuel use. The economizer side leak in the composite boiler caused a disruption in the steam production process on the ship. The type of research method that the author uses in the preparation of this thesis is descriptive qualitative using a fault tree analysis (FTA) approach to simplify data analysis techniques. The author also uses data collection methods that the author does is by way of observation, documentation and interviews to strengthen the data analysis. The purpose of this study was to find out the causes of leakage on the economizer side in the composite boiler type, the impact of the leakage factors on the economizer side on the composite boiler type and efforts were made to prevent the leakage factor on the economizer side in the composite boiler type Mv. Pan Global. Based on the results of the author's research, it can be concluded that the leakage factor in the economizer side in the composite boiler type MV. Pan Global is, 1) The water content of the boiler economizer is not suitable which can be caused by turbid / dirty water conditions, high content of chloride and low pH value. 2) The age of the pipe economizer boiler. 3) Excess steam pressure on the boiler economizer. The impact is 1) Dirt deposits on the boiler economizer, scale on the economizer tube and corrosion on the boiler economizer. 2) Weakening the construction of the economizer boiler. 3) Pressure stress on the boiler economizer. To prevent the economic factors causing leakage efforts to be done is, 1) Replace the cascade filter. 2) Give BWT (Boiler Water Treatment). 3) Chemical treatment and routinely blow down

Polyfluorene as a model system for space-charge-limited conduction

Ethyl-hexyl substituted polyfluorene (PF) with its high level of molecular disorder can be described very well by one-carrier space-charge-limited conduction for a discrete set of trap levels with energy $\sim$ 0.5 eV above the valence band edge. Sweeping the bias above the trap-filling limit in the as-is polymer generates a new set of exponential traps, which is clearly seen in the density of states calculations. The trapped charges in the new set of traps have very long lifetimes and can be detrapped by photoexcitation. Thermal cycling the PF film to a crystalline phase prevents creation of additional traps at higher voltages.Comment: 13 pages, 4 figures. Physical Review B (accepted, 2007

Implementasi Voip Server Berbasis IPV6 dengan Raspberry PI

Voice over Internet Protocol (VoIP) is a telecommunications technology that is able to pass the communication service in Internet Protocol networks so as to allow communicating between users in an IP network. However VoIP technology still has weakness in the Quality of Service (QoS). VOPI weaknesses is affected by the selection of the physical servers used. In this research, VoIP is configured on Linux operating system with Asterisk as VoIP application server and integrated on a Raspberry Pi by using wired and wireless network as the transmission medium. Because of depletion of IPv4 capacity that can be used on the network, it needs to be applied to VoIP system using the IPv6 network protocol with supports devices. The test results by using a wired transmission medium that has obtained are the average delay is 117.851 ms, jitter is 5.796 ms, packet loss is 0.38%, throughput is 962.861 kbps, 8.33% of CPU USAge and 59.33% of memory USAge. The analysis shows that the wired transmission media is better than the wireless transmission media and wireless-wired

Security of Graph Data: Hashing Schemes and Definitions

Use of graph-structured data models is on the rise - in graph databases, in representing biological and healthcare data as well as geographical data. In order to secure graph-structured data, and develop cryptographically secure schemes for graph databases, it is essential to formally define and develop suitable collision resistant one-way hashing schemes and show them they are efficient. The widely used Merkle hash technique is not suitable as it is, because graphs may be directed acyclic ones or cyclic ones. In this paper, we are addressing this problem. Our contributions are: (1) define the practical and formal security model of hashing schemes for graphs, (2) define the formal security model of perfectly secure hashing schemes, (3) describe constructions of hashing and perfectly secure hashing of graphs, and (4) performance results for the constructions. Our constructions use graph traversal techniques, and are highly efficient for hashing, redaction, and verification of hashes graphs. We have implemented the proposed schemes, and our performance analysis on both real and synthetic graph data sets support our claims