Mitigation of False Brinelling in A Roller Bearing: A Case Study of 4 Types of Greases

Four commercial greases with various thickeners and base oils were experimentally examined to compare their false brinelling wear resistance in a test rig simulating roller bearings during rail/sea transportation for the first time. Greases containing zinc dialkyl dithiophosphates (ZDDP) showed superior false brinelling reduction, evidenced by no visible wear mark in the raceways. The mechanism for false brinelling mitigation was shown to be from a ZDDP-induced tribofilm which decreases the friction and wear coefficient in the contact area. Surface chemical analysis showed that for grease lubricated fretting contacts, ZDDP-derived tribofilms can be generated in the presence of micro-sliding motions and energy dissipation at the contact interface at low frequency (i.e. 4-8 Hz), due to the mechanochemical reactions. For greases without ZDDP, false brinelling wear was reduced by 97% when using grease with a more abundant and less viscous oil, which bleeds readily from an open structured thickener. The results highlight the ability of ZDDP as an additive in grease to better protect roller bearings against false brinelling during rail/sea transportation.

Ship building design of general cargo vessel using comparator ship method in port route of Jakarta-Makassar-Manokwari

Marine-based industrial development includes several sectors including Sea Transportation Services, Ferry Services, Capture Fisheries, Offshore Oil & Gas, Marine Biological Resources, Marine Tourism, and Energy Conversion, which in general both management and operations require supporting facilities, namely ships. with certain types that can serve these interests. During the current economic recovery period, there need to be concrete and more innovative steps that must be pursued by all parties, both government and private, in order to reduce the time needed to improve the state’s economic condition. Hence, the role of marine potential is very vital to be further developed in the future. The optimization results of the comparison ship obtained the main dimensions of the design vessel, namely: Lbp = 81.19 m, B = 15.00 m, T = 5.50 m, H = 7.00 m, Cb = 0.75, Cm = 0.99, Cw = 0.84 Cpv = 0.89, Cph = 0.76, Fb = 1.50 m, Fn = 0.22, Displacement = 5280.91 tons, Volume = 5131.583 m3, GRT = 3910 tons, Vs = 12 knots, Lwl = 83.22 m. This comparator ship method makes it easy for ship designers with accurate results.

The application of energy saving to the Kali Adem Muara Angke Port design

The level of sea transportation use in Indonesia is getting higher and higher, so it must be balanced with the improvement in the quality of port supporting infrastructure. The Provincial Government of DKI Jakarta will revitalize Kali Adem Port, which will also be assisted by the Thousand Islands Regency Government, considering that Kali Adem Port is one of the gateways to the Thousand Islands. Kali Adem Port is a passenger port located on Jalan Dermaga, Pluit, Penjaringan, North Jakarta, Special Capital Region of Jakarta. Kali Adem Harbor serves tourists who want to visit several islands in the Thousand Islands, and residents of Pulau Seribu who want to buy some daily necessities from Jakarta. Passenger density, problems with access and circulation, and several other problems require this Port to improve its quality and quantity. This port should have designed to pay attention to the environment, such as applying the eco-tect theme to this building, as well as the waterfront concept to maximize the potential of the existing sea. In this design the concept of shading is applied to the facade to maximize comfort and the application of energy-saving lighting in buildings and the Port and its plazas

Evaluasi Kinerja Layanan dan Tingkat Kepuasan Pelanggan Angkutan Penyeberangan Amolengo-Pure Provinsi Sulawesi Tenggara

Indonesia is a large country that is widespread with it’s islands and isa country traversed by the Equator, so sea transportation has animportant role to play in connecting one area to another, consideringthat Indonesia has a very wide ocean. One of the means of seatransportation that is widely used by the community is the ferry. Ferryis a type of sea transportation that can be used as passenger andgoods transportation using certain routes or routes. With theexistence of the Ferry port, it can increase the acceleration ofdevelopment in the area, especially Amolengo Village, KonaweSelatan Regency.The Amolengo ferry port is a port that serves the crossing ofpassengers and goods that connects the South Konawe mainland andits surroundings with Buton Island, where the destination port is Pureport. The quality of good service provided is one of the determiningfactors for the success of the company. The research method isarranged by interviewing respondents by answering the questions onthe questionnaire. The analysis was performed using ImportancePerformance Analysis (IPA) and the Customer Satisfaction Index (CSI).The results of this study indicate that the consumer satisfaction indexon the performance of the Amolengo - Pure Ferry Port, SoutheastSulawesi Province is 84.6% and is in the range 0.81 - 1.00 indicatingthat consumers are very satisfied with the service quality of theAmolengo - Pure Ferry Port, Southeast Sulawesi Province.

Peran Lembaga Pemberdayaan Masyarakat (LPM) dalam Pembangunan Desa (Studi Kasus di Desa Sabalana Kecamatan Liukang Tangaya Kabupaten Pangkep)

The Role of Community Empowerment Institutions in Village Development in Sabalana Village, Liukang Tangaya District, Pangkep Regency. Educational Sciences, Muhammadiyah University of Makassar. This study aims to determine the role of Community Empowerment Institutions in Village Development, the supporting and inhibiting factors of Community Empowerment Institutions in Village Development. This study used descriptive qualitative research. In this study, the informants were selected directly by the researcher who was called the research target. Based on the characteristics, the informants who had been appointed were the Village Head, Head of the Community Empowerment Institute and the Villagers. This study used observation and interviewing as a tool to collect the data. Based on the results of research in the field, the researcher could see that the role of the Community Empowerment Institution in Village Development in Sabalana Village where the chairman and members of the Community Empowerment Institute have carried out their duties and functions in carrying out every development carried out in Sabalana Village but has not been very effective yet. Factors that support Community Empowerment Institutions in Village Development are the resources owned by the Village officers and always holding coordination meetings. The inhibiting factors of the Community Empowerment Institution in Village Development are sea transportation and the lack of participation of the Villagers in assisting the village officers and the head of the Community Empowerment Institute in carrying out any existing development. The success of the Community Empowerment Institution in increasing development in Sabalana Village, therefore, there is a need for cooperation between the village officers, head of the Community Empowerment Institution (LPM) and the villagers.

Pengaruh Pandemi Covid-19 Terhadap Kunjungan Pelabuhan Perairan Pedalaman: Studi Kasus Pelabuhan Talang Duku

Sebagai negara kepulauan, Indonesia memiliki karakteristik yang unik. Selain di tepi pantai, terdapat juga pelabuhan perairan pedalaman seperti di semenanjung Malaysia and Nigeria, dilayari oleh kapal laut hingga pelosok menuju pelabuhan tujuan. Pengaruh Pandemi Covid-19 dialami juga oleh angkutan laut, khususnya terhadap Kunjungan kapal di Pelabuhan, salah satunya adalah Pelabuhan Talang Duku. Tujuan dari penelitian ini untuk memberikan rekomendasi kebijakan terkait proses bongkar muat kargo selama masa pandemi Covid-19 di Pelabuhan Talang Duku. Penelitian ini menggunakan metode penelitian kuantitatif, analisis gap, dan analisis komparatif. Kajian ini akan membandingkan penanganan bongkar muat barang sebelum dan selama pandemi, serta menganalisis bahwa bongkar muat kargo di pelabuhan mengikuti protokol kesehatan yang ditetapkan pemerintah. Secara umum, panggilan kapal kargo sedikit menurun tidak signifikan sebesar 8,5% di awal pembatasan mobilitas. Sedangkan untuk kegiatan bongkar muat terjadi penurunan yang tidak signifikan sebesar 13,0%. Penurunan terendah terjadi pada Oktober 2020.The Effect of the Covid-19 Pandemic on Inland Water Port Arrival: A Case Study of Talang Duku Port; As an archipelagic country, Indonesia has unique characteristics. In addition to port in the coast, there are also inland water ports such as in peninsula of Malaysia, and Nigeria, navigable by ships to remote areas to the destination port. The influence of the Covid-19 pandemic is also experienced by sea transportation, especially on ship visits at the port, one of which is the Talang Duku Port.The purpose of this study is to give a policy recommendation regarding the process of loading and unloading cargo during the Covid-19 pandemic at Talang Duku-port. This research using quantitative research methods, gap analysis, and comparative analysis. This study will compare the handling of loading and unloading goods before and during the pandemic, and analyze that loading and unloading cargo in the port is following health protocols established by the government. In general, cargo ship calls decreased slightly, but not significantly by 8.5% at the beginning of restriction mobility. While for loading and unloading activities, there was an insignificant decrease of 13.0%. The lowest decline occurred in October 2020.

Characteristic analysis of sea transportation passenger Kendari Nusantara Port

Indonesia, which is an archipelagic country consisting of islands, sea transportation is an absolute necessity for those living in the archipelago. The port terminal is a tool for the process of moving goods and passengers to transfer modes of movement either through sea transportation or land transportation. The purpose of this study was to determine the characteristics of sea transportation users at the Kendari Nusantara port terminal. The method in this study uses a qualitative descriptive by distributing questionnaires to users of the Nusantara Kendari port terminal who want to travel between islands. The results of the study based on the characteristics of sea transportation users through the Kendari Archipelago port were obtained based on the characteristics of sea transportation users (passengers) at the port terminal.the male gender is 57.33%, the most dominant travel destination is Muna Regency at 38.67%, the reason for using fast express boats is the consideration of travel time by 52%, the purpose of the trip is dominated by educational interests by 32.67%, The frequency of using fast boats is very frequent, which is more than 4 times by 33.33%.

Substantiation of Improvements for the Bearing Structure of an Open Car to Provide a Higher Security during Rail/Sea Transportation

This article presents the most frequent damage in the bearing structure of a rail car during rail/sea transportation. The study includes load modes for the bearing structure of an open car such as unloading with a grab and transportation by a train ferry. It was found that the most vulnerable element of the bearing structure of an open car during unloading with a grab is the top cord. The authors suggest applying a viscous material (an elastomer) to reinforce the top cord. This solution was confirmed by means of a strength calculation, whose results showed the efficiency of the solution. The bearing structure of an open car during the train ferry transportation can be protected by mounting special fixation units on the bolster beams. The geometry of such units was chosen according to that of a chain binder. The results of the strength calculation demonstrated that the strength of the bearing structure of an open car was provided with the application of the fixation units suggested. The article also presents the results of the experimental determination of the strength of the improved bearing structure of an open car based on the finite element method and full-scale bench testing. The research conducted might be used by those who are interested in higher operational efficiency of rail cars during rail/sea transportation.