No abstract

The increasing population in Yogyakarta City has implications for consumption and solid waste production activities. The waste collection process is the most expensive one in municipal waste management. It is necessary to determine the optimal route for municipal waste collection. In this research, we developed a vehicle routing problem (VRP) with a heterogeneous fleet, multiple trips, intermediate facility, and split delivery to approach the Yogyakarta City waste collection problem. We proposed a hybrid genetic algorithm (GA) to solve the VRP. The result of this study shows that developed VRP can be used to solve the Yogyakarta City waste collection problem.Abstrak. Jumlah penduduk Kota Yogyakarta yang terus bertambah setiap tahunnya berimplikasi pada semakin meningkatnya aktivitas konsumsi sekaligus sampah yang dihasilkan. Proses pengumpulan sampah merupakan kontributor terbesar untuk biaya pengelolaan sampah. Sehingga diperlukan penentuan rute pengangkutan sampah kota yang optimal. Penelitian ini mengembangkan model vehicle routing problem (VRP) untuk persoalan penentuan rute pengangkutan sampah Kota Yogyakarta yang mempertimbangkan batasan heterogeneous fleet, multiple trip, intermediate facility, dan split delivery yang kemudian diselesaikan menggunakan hybrid genetika algoritma (GA). Peneletian ini berhasil mengembangkan model VRP untuk menyelesaikan persoalan penentuan rute pengangkutan sampah Kota Yogyakarta.Kata Kunci: Vehicle Routing Problem, penentuan rute, pengangkutan sampah kota, Algoritma Genetika

Abstrak. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh sikap, norma subyektif dan kontrol persepsi yang dimodifikasi dengan religiusitas, dan pengetahuan produk terhadap niat beli dan perilaku konsumen muslim dalam membeli produk kosmetik halal. Objek dalam penelitian ini adalah mahasiswa muslim berusia 17-23 tahun yang sedang menempuh pendidikan di Perguruan Tinggi Negeri (PTN) di Provinsi Daerah Istimewa Yogyakarta. Teknik sampling menggunakan purposive sampling. Metode analisis yang digunakan yaitu regresi linear berganda. Pengumpulan data menggunakan kuisoner tertutup dengan jumlah sampel sebanyak 275 sampel. Hasil temuan dari penelitian ini menunjukan bahwa religiusitas, pengetahuan produk, sikap, norma subjektif dan kontrol presepsi memiliki pengaruh positif dan signifikan terhadap niat konsumen dalam membeli produk kosmetik yang halal. Kemudian pengetahuan produk dan niat juga memiliki pengaruh positif dan signifikan terhadap perilaku konsumen dalam membeli produk kosmetik yang halal.Kata kunci: theory of planned behavior, kosmetik, halal, religiusitas, pengetahuan produkAbstract. The purpose of this study was to study the relationship attitudes, subjective norms and perceptual controls related to religiosity, and product knowledge about the purpose of buying and helping Muslim consumers in buying halal cosmetic products. The object in this study was Muslim students aged 17-23 years who were studying at State Universities (PTN) in the Province of Daerah Istimewa Yogyakarta. The sampling technique uses purposive sampling. The analytical method used is multiple linear regression. Data collection uses a closed questionnaire with a total of 275 respondents. The findings of this study indicate that religiosity, product knowledge, attitudes, subjective norms, and perception control have a positive and significant influence on consumers' intentions in buying halal cosmetic products. Then, the product's knowledge and intentions also have a positive and significant influence on consumer behavior in buying halal cosmetic products.Keywords: theory of planned behavior, cosmetics, halal, product knowledge, religiosity

Perkembangan teknologi dengan pemanfaatan e-Commerce seharusnya memberikan kemudahan bagi Usaha Mikro Kecil dan Menengah (UMKM) di Kota Yogyakarta sehingga dapat mensejahterakan perekonomian di Indonesia. Salah satu cara yang digunakan untuk mengembangkan perekonomian yaitu melakukan pemasaran produk kerajian secara online menggunakan e-Commerce. Berdasarkan klasifikasi sebanyak 1895 pelaku UMKM kerajinan di Kota Yogyakarta yang baru terdaftar di website Dinas Perindustrian dan Perdagangan (DISPERINDAG) Kota Yogyakarta sebanyak 453 sehingga masih banyak yang belum memanfaatkan penggunaan e-Commerce dalam pemasaran produknya. Penelitian ini bertujuan untuk mengetahui faktor-faktor lingkungan eksternal yang mempengaruhi hambatan penggunaan e-Commerce pada UMKM kerajinan dan mengetahui pengaruh simultan terhadap faktor teknologi, faktor konsumen, faktor pesaing, dan faktor kebijakan pemerintah. Metode pengumpulan data dilakukan dengan melakukan penyebaran kuisioner dan wawancara sebanyak 100 UMKM kerajinan di Kota Yogyakarta. Metode analisis dalam penelitian ini menggunakan perhitungan regresi linier berganda menggunakan SPSS 15.0 untuk melihat pengaruh antara satu variabel dengan variabel lainnya. Berdasarkan hasil penelitian data, faktor yang berpengaruh terhadap hambatan penggunaan e-Commerce pada UMKM kerajinan di Kota Yogyakarta dilihat dari koefisiennya adalah faktor konsumen sebesar 2,721. Faktor teknologi, pesaing dan kebijakan pemerintah tidak berpengaruh terhadap hambatan penggunaan e-Commerce. Setelah dilakukan pengujian secara simultan didapatkan hasil bahwa variabel independen (teknologi, konsumen, pesaing dan kebijakan pemerintah) dapat menjelaskan variansi dari variabel dependen yaitu hambatan penggunaan e-Commerce pada UMKM Kerajinan di Kota Yogyakarta dengan nilai koefisien determinasi sebesar 11 %

Waste Cooking Oil (WCO) is the waste that came from household. WCO become a threat to community because it will come back to food chains again as residual bulk oil that have cheaper price than branded cooking oil. Lintas Winongo Waste Bank in Bumijo, Jetis, Yogyakarta City are trying to manage the waste cooking oil into recycled products. One of their products is aromatherapy candles. However, they had problem to produce the candles and sell it. They also faced problem about the odor of candle that came from WCO as raw material. The purpose of community service were to provide knowledge and skills to produce aromatherapy candles and to calculate the Cost of Goods Sold (CoGS). The methods in this activity were carried out in two stage. The first activity has organized by training and assistance in producing aromatherapy candles that mixed WCO and other ingredients. The second activity focused in calculating CoGS of candles. The results from these community service activities were increased knowledge and skills about producing aromatherapy candles. There were also increased knowledge about manage CoGS of their products

Waste Cooking Oil (WCO) is classified as municipal waste that potentially could pollute the environment. The form of the chains for waste cooking oil management has never been identified so the benefits are still unknown to the community. Up till now, waste cooking oil is always dumped into drains or sold to third-party collectors for converting it to be residual bulk oil. The risk of dumping waste cooking oil into drains can make the water source pollution. If it is reprocessed for human consumption, it can cause diseases. The added value of waste cooking oil is when converted to energy resource. In Yogyakarta, the chains for waste cooking oil management involved waste banks and Bumdes X that came from Bantul regency. Benefit Cost Ratio (BCR) method was used to determine the added value of the waste cooking oil chains so that it can be used as an energy resource. The BCR for existed WCO chains was less than one because the research didn't consideration illegal chains.

The increasing volume of waste in Bantul Regency is a problem that must be solved. One of the things that the Regency Government does is by promoting waste banks. From the existing waste banks, citizen participation is still low, so it is not significant enough to reduce the volume of waste disposed of at the Piyungan landfill. One of the factors identified is the low interest of residents to join the waste bank. For this reason, a study of citizens' behavior is needed so that they join the waste bank with a theory of planned behavior coupled with knowledge of how and what and knowledge of consequences factors. Data collection was carried out by distributing questionnaires to members of the garbage bank. The number of respondents was 1265 from 29 waste banks spread throughout Bantul Regency. The method of data analysis uses linear regression. Research shows that attitudes, perceived behavioral control, knowledge of how and what, and knowledge of consequences have positive and significant effects, both simultaneously and partially, on the intention of residents to join the waste bank. Intention is also a significant positive and significant effect on behavior.

AbstrakAdanya aduan dari masyarakat maupun dari walikota Kota Yogyakarta mengenai keberadaan Tempat Pembuangan Sementara (TPS) yang dianggap memberikan dampak buruk bagi lingkungan. Selain itu, beberapa lokasi TPS menyebabkan kemacetan saat pengambilan sampah untuk dibawa ke Tempat Pembuangan Akhir (TPA). Menurut data dari DLH Kota Yogyakarta 32,7% Tempat Pembuangan Sementara (TPS) berada di Sektor Krasak. TPS di sektor krasak lebih didominasi Tempat Pembuangan Sementara berukuran kecil. Kapasitas TPS yang tersedia di sektor Krasak lebih besar dibandingkan volume sumber sampah. Ketidakseimbangan tersebut dapat dipenuhi dengan melakukan penutupan TPS yang berukuran kecil. Selain itu terdapat TPS yang tidak dapat menampung sumber sampah dengan jarak terdekat, sehingga perlu dilakukan perluasan fasilitas (redesign). Fasilitas umum berupa pendidikan formal dapat memberikan tambahan penyumbang timbulan sampah. Penelitian ini mencoba untuk meminimalkan jumlah TPS di Sektor Krasak dengan mempertimbangkan kapasitas penampungan TPS. Pendekatan penyelesaikan permasalahan ini menggunakan set covering problem. Penentuan fasilitas yang diperluas dilakukan secara diskrit. Keputusan terbaik menggunakan tiga kondisi yaitu: (1) Peningkatan kapasitas TPSS Tribrata, (2) Peningkatkan kapasitas TPSS Kusbini I dan (3) Peningkatan kapasitas keduanya. Berdasarkan ketiga kondisi tersebut terpilih keputusan terbaik merupakan kondisi 2, dimana peningkatkan TPSS Kusbini I sesuai kapasitas maksimal untuk TPSS sebesar 32 m 3 dari lima kelurahan di Kecamatan Gondokusuman dan keseluruhan sarana pendidikan formal memerlukan total kapasitas TPS total sebesar 118 m 3 . Sehingga, TPS yang akan tetap dibuka yaitu Depo Sagan, Landasan Kontainer RRI, TPSS Pengok dan TPSS Kusbini I. Kata Kunci: set covering problem, design fasilitas, tempat pembuangan sementara 28 Penentuan Open/Closed Fasilitas Tempat Pembuangan Sampah dengan Mempertimbangkan Desain Fasilitas dan Sarana Pendidikan Formal Abstract There was a complaint from the community and the mayor of the city of Yogyakarta regarding the existence of a Temporary Disposal Site (TPS) which was considered to have a negative impact on the environment. In addition, several TPS locations caused congestion when collecting garbage to be taken to the Final Disposal Site According to data from the City of Yogyakarta DLH 32.7% of Temporary Disposal Sites (TPS) are in the Krasak Sector. TPS in the secondary sector is dominated by small-sized Temporary Disposal Sites. The capacity of TPS available in the Krasak sector is greater than the volume of garbage sources. This imbalance can be fulfilled by closing small sized polling stations. In addition there are polling stations that cannot accommodate the nearest source of garbage, so that facilities need to be expanded. Public facilities in the form of formal education can provide additional contributors to waste generation. This study attempts to minimize the number of polling stations in the Krasak Sector by considering the TPS holding capacity. This problem solv...