Analysis of Accident-Prone Areas on The Kalimalang Canal Inspection Road, East Jakarta

The number of traffic accidents that increase every year can be caused by factors such as drivers, vehicles, roads and the environment. In Indonesia, traffic accidents are one of the problems in the transportation sector. Prevention taken so far to anticipate accidents is only based on data on the quantity of accidents that have occurred. Whereas the factors or events that can cause accidents are the biggest contributor to accidents. For example, driving a vehicle in an orderly manner, driving at a speed above the average determined traffic regulation and non-standard road conditions. This research was conducted to identify accident-prone locations in an area by identifying and analyzing each segment based on point coordinates in the accident data and applying it to the AEK method. The research location is on the Kalimalang Canal Inspection road, East Jakarta which is divided into 5 segments. And these segments start from the border of Bekasi with East Jakarta to Cawang East Jakarta. The results show that the research location has the potential as an accident-prone area where the location is in segment 5 and on these roads after surveying it is found that there are several points. which do not have road markings, minimal road signs, several damaged road points, and incomplete street lighting. Which can result in traffic accident

SISTEM INFORMASI GEOGRAFIS PENGELOMPOKAN PENGERAJIN ALAS KAKI KOTA MOJOKERTO

Pengerajin alas kaki merupakan sebuah industri yang bertumbuh pesat di Kota Mojokerto. Pertumbuhan dari pengerajin ini tersebar di berbagai kecamatan di Kota Mojokerto. Maka diperlukannya sebuah sistem informasi pengelompokan pengerajin alas kaki kota mojokerto untuk mengelompokkan dari setiap pengerajin dan melihat persebaran pengerajin alas kaki di setiap kecamatan. Proses pengelompokan meliputi 3 kategori yaitu besar, menengah dan berkembang berdasarkan data yang diperoleh. Metode pengelompokan pengerajin menggunakan Fuzzy C-Means. Metode ini dipilih karena dapat menghitung cluster tingkat tinggi. Hasil akhir yang diperoleh adalah sebuah sistem informasi geografis pengelompokan pengerajin alas kaki Kota Mojokerto. Sistem diuji dengan melakukan perbandingan pengelompokan secara manual dan perhitungan sistem diperoleh kecocokan 59,55056%. Dari hasil uji coba terhadap beberapa user menunjukkan bahwa sistem sesuai dengan kebutuhan user sebagai informasi tentang pengerajin alas kaki kota mojokerto

Experiment on Ability to Understand Three Dimensional Material Concepts Related to Learning Styles Using the Geogebra-Supported STAD Learning Model

The abstract nature of mathematical objects makes learning mathematics difficult and many students experience difficulties in learning mathematics. The purpose of this study was to determine the effect of the Geo - Gebra- assisted STAD learning model on the ability of students' mathematical understanding of learning styles. This study uses a quasi-experimental research method. The population of this study were students of SMA in the 2015/2016 academic year. The research sample was taken by cluster random sampling. The sample size is 64 students, consisting of 34 students in the experimental class and 30 students in the control class. As a research instrument , the researcher conducted a mathematics learning achievement test and a learning style questionnaire. Data were analyzed using two-way ANOVA. The conclusions of this study are: Geogebra- assisted STAD -type collaborative learning model Winplot produces better mathematical comprehension abilities and mathematics learning achievement compared to PowerPoint-assisted direct learning models. Students with a visual learning style are at the same level as students with an auditory learning style. Students with an auditory learning style are at the same level as students with a kinesthetic learning style. Students with a visual learning style perform better in school than students with a kinesthetic learning style

Positive Identification on the Skull From Colonial Era in Balai Pemuda, Surabaya

Dua tengkorak manusia ditemukan saat pembangunan ruang bawah tanah pada 30 November 2016 hingga 1 Desember 2016, di Balai Pemuda, Surabaya, salah satu bangunan peninggalan masa kolonial di Indonesia. Penemuan dua tengkorak menimbulkan pertanyaan, seperti identitas dan konteks keberadaannya. Kedua tengkorak tersebut diberi kode identitas tengkorak 160689 dan tengkorak 160690. Penelitian ini bertujuan untuk mengungkap identitas tengkorak 160689 dan tengkorak 160690 berdasarkan prosedur identifikasi positif antropologi forensik. Penelitian ini menggunakan metode prosedur identifikasi antropologi forensik. Metode ini diterapkan secara berurutan, pertama umur, kedua jenis kelamin, ketiga afiliasi populasi, keempat tinggi badan, dan terakhir karakteristik individu. Menariknya, karakteristik individu tengkorak 160690 ditemukan sejumlah bukti berbeda yang menjelaskan identitasnya, yaitu, modifikasi gigi, jejak penyakit, dan bentuk kepala asimetris. Berdasarkan hasil identifikasi positif pada tengkorak 160689 dan tengkorak 160690 menunjukkan bahwa kedua tengkorak tersebut berjenis kelamin perempuan dan berafiliasi dengan populasi ras Mongoloid. Terakhir, karakteristik individu dan deformasi pada daerah oksipital mengindikasikan deformasi yang tidak disengaja yang disebabkan oleh tekanan terus menerus pada sisi kiri daerah oksipital. Plagiocephaly bisa jadi akibat dari posisi tidur yang salah selama masa kanak-kanak. Two human skulls were found during basement construction from November 30th, 2016, to December 1st, 2016, in Balai Pemuda, Surabaya, one of Indonesia's colonial-era buildings. The discovery of two skulls raised questions, such as the identity and its context of existence. Both skulls were coded as skull 160689 and 160690. This research aimed to reveal the identity of skull 160689 and 160690 based on the positive identification procedure of forensic anthropology. This research applies the method of the forensic anthropology identification procedure. This method was used sequentially, firstly age, secondly gender, thirdly population affiliation, fourthly stature, and lastly, individual characteristics. Interestingly, the individual characteristics of skull 160690 have distinct evidence for explaining its identity, for instance, dental modification, disease markers, and asymmetrical head shape. Based on the positive identification results on skull 160689 and 160690 showed both skulls were female and affiliated with Mongoloid population. At last, individual characteristics and deformation on the occipital area were indicated as an unintentional deformation caused by pressure continuously on the left side of the occipital area. Plagiocephaly could be a result of incorrect sleeping position during childhood

Analisis Rugi-Rugi Daya Jaringan Distribusi Penyulang POLDA Area Makassar Utara Dengan ETAP 12.6

Analisis Rugi-rugi Daya Saluran Distribusi Tegangan Menengah Penyulang Polda, bertujuan tegangan menengah penyulang polda. Perhitungan Rugi-rugi daya saat ini banyak menggunakan aplikasi computer, tujuannya untuk mempermuda dan mendapatkan hasil yang cepat dan akurat pada penelitian menggunakan software ETAP 12.6, disamping itu juga dilakukan perhitungan manual kemudian membandingkan dengan hasil dari software ETAP. Rugi-rugi pada Penyulang Polda menggunakan Software Etap  adalah 600,9 kW dan perhitungan manual 509,8 kW, Besar rugi-rugi Daya yang terbesar ada line 53 yaitu dari bus 121 ke bus 122 dan yang paling kecil terjadi pada line 98 yaitu dari bus 200 ke bus 201

The Variability in the Distribution of Nitrate Concentration at the Surface of the Southeast Indian Ocean

The waters that surround the Indonesian archipelago are home to some of the most fruitful primary resources that can be found anywhere in the southeastern Indian Ocean. In this work, we present an investigation of seasonal fluctuations in nutrient content within the region, utilizing 30-years reanalysis data generated by Copernicus Marine Service. The month of SON exhibits the maximum concentration of nitrate content, primarily observed in the southern region of Java and the Lombok Strait. The concentrations of nitrates experience significant changes that are notably impacted by Indian Ocean Dipole (IOD) occurrences. Specifically, a positive IOD event is associated with elevated nitrate levels, particularly during the period spanning from June to December. Furthermore, in the southern Java region, an inverse correlation was identified between nitrate concentrations and surface zonal currents, commonly referred to as the South Java Current (SJC). Concurrently, the reinforcement of the Indonesian Throughflow (ITF) in the Lombok Strait is consistently accompanied by an elevation in nitrate concentration within the southern region

Ritual tooth ablation and the Austronesian expansion: Evidence from eastern Indonesia and the Pacific Islands

Ritual tooth ablation, the intentional removal of teeth, is a highly visible form of body modification that can signal group identity and mark certain life events, such as marriage. The widespread occurrence of the practice in Asia appears to have begun in the Neolithic period and in some areas, such as Taiwan, continued until the ethnographic present. We aim to use a biocultural approach to investigate the significance of tooth ablation in Indonesia and Vanuatu during the maritime expansion of Austronesian-speaking groups ca. 3500-2000 years ago. Here we assess the presence and patterns of tooth ablation in four prehistoric skeletal assemblages from eastern Indonesia (Pain Haka, Melolo, Lewoleba and Liang Bua) and one from Vanuatu (Uripiv). Despite the relatively small sample sizes, it was found that individuals from all the sites displayed tooth ablation. The Indonesian populations had ablation patterns that involved the maxillary lateral incisors and canines and the individuals from Uripiv had the central maxillary incisors removed. We suggest that the distribution of tooth ablation in eastern Indonesia provides strong evidence that this practice was an important ritual process associated with the early expansion of Austronesian-speaking populations in the region. The identification of tooth ablation at the site of Uripiv is the earliest example of the practice in the Pacific Islands and was either a Southeast Asian tradition brought by Austronesian settlers, was introduced later from Near Oceania, or was an indigenous development in Vanuatu. A similar pattern of tooth ablation (the removal of central maxillary incisors) has been documented in ethnographic reports of northern Vanuatu tribes. We argue that the practice could possibly be a ritual passed through the generations since the early settlement of Vanuatu.Funding was provided by New Zealand Marsden Grant (09-UOO-106); Australian Research Council (ARC) Discovery Grant (DP0556874); New Zealand Fast-Start Marsden Grant (18-UOO135); a University of Otago Research Grant; the Research Institute for Development, UMR Paloc; and the French Embassy in Indonesia

Ritual tooth ablation and the Austronesian expansion: Evidence from eastern Indonesia and the Pacific Islands

Ritual tooth ablation, the intentional removal of teeth, is a highly visible form of body modification that can signal group identity and mark certain life events, such as marriage. The widespread occurrence of the practice in Asia appears to have begun in the Neolithic period and in some areas, such as Taiwan, continued until the ethnographic present. We aim to use a biocultural approach to investigate the significance of tooth ablation in Indonesia and Vanuatu during the maritime expansion of Austronesian-speaking groups ca. 3500–2000 years ago. Here we assess the presence and patterns of tooth ablation in four prehistoric skeletal assemblages from eastern Indonesia (Pain Haka, Melolo, Lewoleba and Liang Bua) and one from Vanuatu (Uripiv). Despite the relatively small sample sizes, it was found that individuals from all the sites displayed tooth ablation. The Indonesian populations had ablation patterns that involved the maxillary lateral incisors and canines and the individuals from Uripiv had the central maxillary incisors removed. We suggest that the distribution of tooth ablation in eastern Indonesia provides strong evidence that this practice was an important ritual process associated with the early expansion of Austronesian-speaking populations in the region. The identification of tooth ablation at the site of Uripiv is the earliest example of the practice in the Pacific Islands and was either a Southeast Asian tradition brought by Austronesian settlers, was introduced later from Near Oceania, or was an indigenous development in Vanuatu. A similar pattern of tooth ablation (the removal of central maxillary incisors) has been documented in ethnographic reports of northern Vanuatu tribes. We argue that the practice could possibly be a ritual passed through the generations since the early settlement of Vanuatu. © 2022 Taylor & Francis Group, LLC

Ancient genomes from the last three millennia support multiple human dispersals into Wallacea

Previous research indicates that human genetic diversity in Wallacea—islands in present-day Eastern Indonesia and Timor-Leste that were never part of the Sunda or Sahul continental shelves—has been shaped by complex interactions between migrating Austronesian farmers and indigenous hunter–gatherer communities. Yet, inferences based on present-day groups proved insufficient to disentangle this region’s demographic movements and admixture timings. Here, we investigate the spatio-temporal patterns of variation in Wallacea based on genome-wide data from 16 ancient individuals (2600–250 years BP) from the North Moluccas, Sulawesi and East Nusa Tenggara. While ancestry in the northern islands primarily reflects contact between Austronesian- and Papuan-related groups, ancestry in the southern islands reveals additional contributions from Mainland Southeast Asia that seem to predate the arrival of Austronesians. Admixture time estimates further support multiple and/or continuous admixture involving Papuan- and Asian-related groups throughout Wallacea. Our results clarify previously debated times of admixture and suggest that the Neolithic dispersals into Island Southeast Asia are associated with the spread of multiple genetic ancestries