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DESIGN AND CONSTRUCTION OF COMMUNITY BASED FLOATING DOCK IN PARIT ISLAND, KARIMUN DISTRICT, RIAU ISLANDS, INDONESIA
Get PDFMany Indonesian islands lack essential inter-island crossing facilities, posing challenges for small island communities' livelihoods. This study addresses the need for accessible docking facilities in Parit Island, Riau Islands, using a community-based floating dock approach. It is chosen due to relatively high tides conditions onsite. The project began with site-specific metocean analysis and extensive stakeholder consultations, ensuring alignment with community aspirations. Eco-friendly materials like wooden frames and plastic drums were used for simplicity and sustainability in dock construction. Local artisans and laborers were engaged, promoting community involvement and economic empowerment. This paper delves into dock design, stability, piling systems, and accessibility. The completed community-based floating dock enhances local living standards and regional trade. It serves as a model for straightforward infrastructure development in island communities, emphasizing community engagement, environmental responsibility, and socioeconomic progress
Implementation of Non-Uniform F-K and Strict F-K Filter Normalization in Seismic Downhole Processing
Get PDFIn fundamental geophysics, we can understand that if we hit the surface, the body and surface waves propagate into and on the soil or rock. The body waves consist of pressure waves, which are the fastest, and shear waves, which are slower. This phenomenon can be measured using the seismic downhole method to determine the velocity of P and S waves of soil layers by generating source energy at the surface and calculating the arrival time at a tri-axial sensor inside a borehole. Determining the arrival time of S waves is often tricky because the recorded S wave arrival is on the coda of the P waves and is also distracted by measurement noise. A common method to separate P and S waves is direct F-K filtering from the F-K image of the measurement data. This study modified this method by adjusting the actual source-receiver distance by implementing a non-uniform F-K transform to produce the correct velocity response. Another improvement was strict filter normalization to regain continuity, thus preventing a shadow response in the F-K image. Synthetic and real measurement data showed that our modification performed better than direct FK-filtering
saLFIA: Semi-automatic Live Feeds Image Annotation Tool for Vehicle Classification Dataset
Get PDFDeep learning’s reliance on abundant data with accurate annotations presents a significant drawback, as developing datasets is often time-consuming and costly for specific problems. To address this drawback, we propose a semi-automatic live-feed image annotation tool called saLFIA. Our case study utilized CCTV data from Indonesia’s toll roads as one of the sources for live-feed images. The primary contribution of saLFIA is a labeling tool designed to generate new datasets from public source images, focusing on vehicle classification using YOLOv3 and SSD algorithms. The evaluation results indicated that SSD achieved higher accuracy with fewer initial images, while YOLOv3 reached maximum accuracy with larger initial datasets, resulting in 8 misdetections out of 380 objects. The saLFIA tool simplifies the annotation process, presenting a labeling tool for creating annotated datasets in a single operation. saLFIA is available at URL https://github.com/gilangmantara/salfia
The Comparison of Factors Affecting Employee Loyalty of Generations X, Y and Z in Bangkok’s Hotel and Restaurant Industries
Get PDFThis study investigated the elements affecting job satisfaction and employee loyalty among employees from Generations X, Y, and Z in Bangkok's hospitality sector. These generational cohorts are projected to form a substantial portion of the labor force by 2025, each of which brings distinct work-related perspectives. This study aimed to identify the crucial factors influencing loyalty to enhance employee retention in the hotel and restaurant industries. Using Herzberg's Two-Factor Theory as a conceptual framework, data were gathered from 565 workers through a survey. The findings revealed that employee training, compensation, teamwork, and work-life balance had significant positive effects on job satisfaction, while employee empowerment did not show a substantial impact. Job satisfaction significantly influences employee loyalty. The results varied across generations: Generation Z valued teamwork and work-life balance significantly, with training showing marginal importance. For Generation Y, all four factors - training, compensation, teamwork, and work-life balance–were significant. Generation X prioritized work-life balance and compensation. These insights can benefit hospitality businesses by helping them develop targeted strategies for retaining employees and reducing turnover, potentially leading to enhanced productivity and financial performance. Moreover, this study offers valuable information about the motivations and preferences of the younger workforce generations, which can inform human resource management practices and policies in the industry
BOOK REVIEW: Halal Logistics and Supply Chain Management in Southeast Asia
No full textHalal logistics and halal supply chain management play essential role in the halal assurance system. Southeast Asia consist of some muslim majority populated countries, and countries with significant number of muslim consumers. The emerging concern towards halal logistics is a certainty after the rising concern worldwide towards halal industry and halal certification system. Southeast Asia is also a home of a country which has announced the mandatory halal certification. The discussion which spans from theoretical perspectives into empirical implementation of policies related to halal logistics in this region may give insight into how halal assurance should be prepared and executed. Articles in this book written with similar conclusions stating that halal is not merely conceptual religious obligations, but also needs technical implementation which will need comphrehensive frameworks. These frameworks consists of inter-related elements which are essential for the optimum system operation. The studies also elaborate opportunities and room for improvements in this halal logistics sector, in order to maintain the optimum total halal assurance implementation
Pengaruh Limbah Polimer PET dan EVA sebagai Subtitusi Pasir Silika dan Semen terhadap Peningkatan Kuat Lentur, Sifat Fisis dan Karakterisasi Mortar Polimer
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A study was conducted on the manufacture of polymer mortar using Polyethylene Terephthalate (PET) as a substitute for sand with a composition of 0%, 0.2%, 0.5%, 0.8%, 1.1%, 1.4% and Ethylene Vinyl Acetate (EVA) polymer composition of 0%, 2%, 4%, 6%, 8%, 10%. Sand, cement and polymer materials were weighed and molded into a size of 16 × 4 × 4 cm3 and soaked in water for 7 and 14 days. The highest flexural strength value obtained at 14 days of immersion was 6.50 MPa, porosity at 7 days of 12.20%, absorption value at 7 days of 6.65% and density at 14 days of 1.89 g/cm3 with a polymer substitution composition for sand of 10% EVA polymer: 1.4% PET. Characterization of the sample was carried out using X-ray Diffraction (XRD), X-ray fluorescence (XRF), Scanning Electron Microscope- Energy Dispersive X-ray spectroscopy (SEM-EDS), and Fourier-transform infrared spectroscopy (FTIR). XRF characterization obtained CaO of 46.95% and SiO2 of 24.45%, which is the result of CS-H formation. XRD characterization obtained calcite, quartz, corundum, hematite phases. SEM-EDS images show a cauliflower-like morphology and dominant elements of Ca and Si. FTIR functional groups are O-H, C=O, C-C, C-H, Si-O-Si, and Si-O is a portlandite group. The increasing addition of EVA and PET polymers results in high porosity and high flexural strength.
Keywords: Polymer, mortar, EVA, PET, and characterization.Abstrak
Dilakukan penelitian pembuatan mortar polimer menggunakan Polyethylene Terephthalate (PET) sebagai substitusi pasir dengan komposisi 0%, 0,2%, 0,5%, 0,8%, 1,1%, 1,4% dan polimer Ethylene Vinyl Acetate (EVA) komposisi 0%, 2%, 4%, 6%, 8%, 10%. Bahan pasir, semen dan polimer ditimbang dan dicetak berbentuk ukuran 16 x 4 x 4 cm3 dan direndam dalam air selama 7 dan 14 hari. Didapatkan nilai kuat lentur tertinggi waktu perendaman 14 hari sebesar 6,50 MPa, porositas umur 7 hari sebesar 12,20%, nilai absorbsi umur 7 hari sebesar 6,65% dan massa jenis umur 14 hari sebesar 1,89 g/cm3dengan komposisi substitusi polimer terhadap pasir sebanyak polimer EVA 10% : PET 1,4%. Dilakukan karakterisasi pada sampel dengan alat X-ray Diffraction (XRD), X-rayfluorescence (XRF), Scanning Electron Microscope- Energy Dispersive X-ray spectroscopy (SEM-EDS), danFourier-transform infrared spectroscopy (FTIR). Karakterisasi XRF didapat CaO sebesar 46,95% dan SiO2 sebesar 24,45%, merupakan hasil pembentukan C-S-H. Karakterisasi XRD didapat fasa calcite, quartz, corundum, hematite. Citra SEM-EDS memperlihatkan morfologi berbentuk seperti kembang kol dan unsur dominan Ca dan Si. Gugus fungsi FTIR yaitu O-H, C=O, C-C, C-H, Si-O-Si, dan Si-O merupakan gugus portlandite. Semakin banyak penambahan polimer EVA dan PET menghasilkan porositas yang tinggi dan kuat lentur yang tinggi.Kata-kata Kunci: Mortar polimer, EVA, PET, dan karaterisasi.
Kata-kata Kunci : Mortar polimer, EVA, PET, dan karaterisasi.
Pemetaan Buku Cerita Anak di Indonesia 1975-1985: Indonesia
No full textThis study examines the development of children's storybooks in Indonesia during the period of 1975-1985, known as the golden age of children's literature. Using a qualitative approach and Content Analysis method, this study maps 131 children's book titles in terms of publishing aspects and visual characteristics. The results show that the development of children's storybooks in this era was heavily influenced by the Presidential Instruction No. 10 of 1973 and the removal of paper subsidies. Mapping of publishing aspects reveals the dominance of male authors and illustrators, as well as the significant role of publishers such as Pustaka Jaya, Gramedia, and Balai Pustaka. The majority of books have 50-70 pages with text dominating. Analysis of visual characteristics shows a preference for simplified style, outline and shading techniques, and the dominance of black and white colors. Visual representation is dominated by human characters in everyday life settings, with portrait visual structure and symmetrical composition. The themes raised tend to be monotonous, often reflecting government propaganda. This research highlights the importance of documentation and recognition of the contributions of writers and illustrators of that era, and provides valuable insights into the dynamics of the children's publishing industry in Indonesia during the New Order era. keyword: children's storybooks, illustration, New Order, propaganda, content analysisPenelitian ini mengkaji perkembangan buku cerita anak di Indonesia periode 1975-1985, era yang dikenal sebagai masa keemasan literatur anak. Dengan menggunakan pendekatan kualitatif dan metode Content Analysis, studi ini memetakan 131 judul buku cerita anak dari aspek penerbitan dan karakteristik visual. Hasil penelitian menunjukkan bahwa perkembangan buku cerita anak pada era ini sangat dipengaruhi oleh kebijakan Inpres No. 10 tahun 1973 dan dicabutnya subsidi kertas. Pemetaan aspek penerbitan mengungkapkan dominasi penulis dan ilustrator laki-laki, serta peran signifikan penerbit seperti Pustaka Jaya, Gramedia, dan Balai Pustaka. Mayoritas buku memiliki 50-70 halaman dengan teks mendominasi. Analisis karakteristik visual menunjukkan preferensi gaya simplifikasi, teknik outline dan arsir, serta dominasi warna hitam-putih. Representasi visual didominasi karakter manusia dalam setting kehidupan sehari-hari, dengan struktur visual portrait dan komposisi simetris. Tema-tema yang diangkat cenderung monoton, seringkali mencerminkan propaganda pemerintah. Penelitian ini menyoroti pentingnya dokumentasi dan pengakuan terhadap kontribusi penulis dan ilustrator era tersebut, serta memberikan wawasan berharga tentang dinamika industri penerbitan anak di Indonesia pada masa Orde Baru. Kata Kunci: buku cerita anak, ilustrasi, Orde Baru, propaganda, analisis konte
Kemungkinan Kunjungan Ulang Pasca Event Olahraga: Temuan Survei Peserta dan Pengunjung Internasional pada Asian Games 2018
No full textThe 2018 Jakarta-Palembang Asian Games is the most significant event in Asian Games history regarding contested sports, participating nations, and athletes. This study identifies the long-term benefits of the event to the host country, focusing on the international attendees’ propensity to revisit Indonesia after the event. We administered a survey throughout the two weeks of the event, yielding usable responses from 1,914 international attendees, including athletes, officials, journalists, committees, and spectators. We use the survey results to describe attendees’ evaluation of the event and Indonesia as the host country. Further, this study also estimates a multinomial logistic regression to identify the association between tourist characteristics and their intention to revisit Indonesia beyond the event. The results show that providing information and communication technology, transportation arrangement, culture, and hosting cities positively correlate with the propensity to return. In contrast, the previous visit to Indonesia has the opposite effect. International respondents mainly express their desire to revisit Indonesia on a long-stay plan. Lastly, we also discuss the academic and practical implications of our findings.Asian Games 2018 di Jakarta dan Palembang merupakan perhelatan terbesar dalam sejarah Asian Games dari sisi cabang olah raga yang diperebutkan, negara yang berpartisipasi dan jumlah atlet. Studi ini bertujuan untuk mengidentifikasi manfaat jangka panjang dari acara tersebut bagi negara tuan rumah, terutama kecenderungan peserta internasional untuk mengunjungi kembali Indonesia. Survei dilakukan selama dua minggu, untuk mendapatkan tanggapan dari 1.914 peserta internasional termasuk atlet, ofisial, jurnalis, komite, dan penonton. Hasil estimasi menunjukkan bahwa penyediaan teknologi informasi dan komunikasi, penataan transportasi, budaya, kota penyelenggara berkorelasi positif dengan kecenderungan untuk kembali sedangkan kunjungan sebelumnya ke Indonesia memiliki pengaruh yang berlawanan. Lebih lanjut, sebagian besar responden internasional mengungkapkan keinginan mereka untuk kembali ke Indonesia dengan rencana untuk tinggal lebih lama
The Effect of Coastal Dike and Retention Pond Performance on Flood and Tidal Control in Pekalongan
Get PDFAbstract.Pekalongan is one of the areas located in the north of Java Island. The main problem in Pekalongan is tidalflooding. This tidal flood worsens when there is a high discharge in the river. For this reason, the government builta Coastal Dike and a Retention Pond to overcome these problems. The concept of this system is to create a coastaldike that crosses the river to eliminate tidal effects. The retention pond is located along the coastal dike toaccommodate the discharge from the river, then the water will be pumped downstream of the river. This study aimsto obtain pump operating time for each pump built in this system to reduce the flood elevation of Q25 to – 0.5 m inthe retention pond. One dimensional flow modeling was used in the approach with the Hydrologic EngineeringCenter-River Analysis System (HEC-RAS) 6.0 model. This research shows that the pump operating time for theSilempeng and Sengkarang pumps is 150 hours. The addition of Mrican pumps and flap gates can reduce pumpoperating time to support the success of Coastal Dike and Retention Ponds in controlling floods and tidal inPekalongan.Keywords: Tidal flood, coastal dike, retention pond, pump.
Abstrak.Pekalongan merupakan salah satu daerah yang terletak di utara Pulau Jawa. Masalah utama di Pekalonganadalah banjir rob. Banjir rob ini semakin parah ketika terjadi debit yang tinggi di aliran sungai. Untuk itupemerintah membangun tanggul rob dan kolam retensi untuk mengatasi permasalahan tersebut. Konsep sistem iniadalah membuat tanggul rob yang melintang sungai, menghalangi backwater dari laut untuk menghilangkan efekpasang surut. Kolam retensi terletak di sepanjang tanggul rob untuk menampung debit dari sungai, kemudian airakan dipompa ke arah hilir sungai. Tujuan dari penelitian ini adalah mendapatkan waktu operasional pompa untukmasing-masing pompa yang terbangun di sistem ini dalam menurunkan elevasi banjir Q25 sampai dengan elevasi –0,5 m di kolam retensi. Di dalam penelitian ini juga dilihat waktu operasional pompa setelah penambahan pompamrican dan pintu klep di Mrican. Pemodelan satu aliran dimensi dilakukan dengan model HEC-RAS 6.0. Hasil daripenelitian ini adalah waktu operasional pompa untuk pompa silempeng dan sengkarang adalah 150 jam.Penambahan pompa Mrican dan pintu klep dapat mengurangi waktu operasi pompa untuk mendukungkeberhasilan Tanggul Pesisir dan Kolam Retensi dalam pengendalian banjir dan pasang surut di Pekalongan.
Kata-kata Kunci: Banjir rob, tanggul rob, kolam retensi, pompa
Pemenuhan Kekurangan Air melalui Simulasi Jaringan Pipa Transmisi Air Bersih SPAM Lhokseumawe
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Pesatnya pertumbuhan penduduk dan laju pembangunan berbagai sektor dan bidang pada suatu daerah berdampak terhadap besarnya kebutuhan air bersih. Kota Lhokseumawe berpenduduk padat namun memiliki permasalahan belum terpenuhinya kebutuhan air bersih bagi masyarakat serta kontinuitas air bersih yang belum terjaga sebagai syarat standar pelayanan minimum sebuah kota. Oleh karena itu studi ini bertujuan untuk memperoleh informasi dimensi pipa, nilai parameter hidrolik pipa transmisi, dan mencukupi pasokan air bersih di Kota Lhokseumawe berdasarkan hasil simulasi jaringan air bersih. Simulasi jaringan pipa transmisi air bersih dilakukan dengan menggunakan perangkat lunak Epanet 2.2 lalu membandingkan hasil simulasi Epanet 2.2 dengan perhitungan manual pada beberapa pipa. Berdasarkan hasil simulasi diperoleh informasi optimal berupa diameter pipa transmisi HDPE Ø560 mm dengan total panjang pipa dari reservoir intake Sungai Krueng Mane sampai Reservoir IPA Muara Satu – Rancong yaitu 22 km. Diperlukan penggunaan 3 buah pompa dan 2 buah katup type PRV dan type PSV, dengan mengacu pada spesifikasi perencanaan pipa transmisi air baku. Parameter hidrolik pipa transmisi yang optimal diperoleh kecepatan aliran sebesar 1,82 m/det, kehilangan tenaga 3,54 m/km, koefisien gesekan 0,012, dan debit aliran 449,42 l/det, sehingga mencukupi kebutuhan air di Kota Lhokseumawe.
Kata Kunci: Epanet 2.2, Lhokseumawe, Pipa transmisi, IPA Muara Satu - Rancong
Abstract
The rapid population growth and the rate of development of various sectors and fields in an area have an impact on the large demand for clean water. Lhokseumawe City has several problems in meeting the supply of clean water, such as the water being distributed is not sufficient to meet the needs of the community and the continuity of clean water is not maintained. This study aims to determine the dimensions of the pipe, the value of the hydraulic parameters of the transmission pipe, and the sufficient supply of clean water in Lhokseumawe City. The simulation of transmission pipe network with the Epanet 2.2 software, and compare with manual calculations on several pipes. The optimal result of modeling water demand are the diameter of HDPE transmission pipe Ø560 mm and the total pipe length from the Krueng Mane River intake reservoir to the Muara Satu – Rancong WTP Reservoir, which is 22 km. Needs 3 pumps and 2 valves of the PRV type and PSV type, with reference to the design specifications for the water transmission pipe. The optimal calculation results show that the flow velocity is 1.82 m/s, the power loss is 3.54 m/km, the friction coefficient is 0.012, the flow rate is 449.42 l/s, so that it is sufficient for water needs in Lhokseumawe City.
Keywords: Epanet 2.2, Lhokseumawe, Transmission pipeline, WTP Muara Satu – Rancong