Universitas Wiraswasta Indonesia

Abstract Seismic inversion is a key technique in reservoir characterization, enabling the transformation of seismic reflection data into quantitative rock property models such as acoustic impedance. This process is essential for enhancing gas field productivity by identifying reservoir features and estimating critical rock parameters. However, conventional inversion methods often struggle to accurately predict complex subsurface properties like porosity and density due to limitations in seismic resolution and the nonlinear nature of rock physics. To overcome these challenges, this study introduces an integrated methodology that combines acoustic impedance-based seismic inversion with Neural Network-driven multi-attribute analysis to evaluate a gas reservoir in the M Field, East Java Basin. Utilizing high-resolution pre-stack seismic data, the approach estimates the spatial distribution of porosity, density, and velocity. Additionally, the Neural Network analysis is employed to assess a shallower, less-explored interval, characterized by acoustic impedance values between 2948.46 and 3208.68 (g/cc*m/s), porosity levels of 18-20%, sandstone-like density ranging from 1.80 to 1.83 (g/cm 3 ), and Vp/Vs ratios from 1.83 to 1.77. This integrated workflow enhances reservoir prediction accuracy and deepens the understanding of gas-bearing zones in the study area.

Underweight in toddlers is a significant public health concern in Indonesia, where the 2022 National Nutrition Status Survey reported a prevalence of 17,1% among children under five years of age, reflecting persistent nutritional challenges. This study aimed to analyze the incidence of underweight in toddlers in the Belawan Primary Health Center (PHC) and its contributing factors. This research applied a descriptive-analytical design with a cross-sectional approach, conducted in January 2025, in Belawan, Medan City, North Sumatra. A total of 41 toddlers were selected using a total sampling method. Data were collected using structured questionnaires and secondary records, and ethical approval was obtained from the Institutional Review Board. The sample size was determined based on the population of underweight toddlers recorded at the health center. Data were analyzed using chi-square tests and logistic regression. The results indicated significant associations between exclusive breastfeeding (p=0,032), inappropriate complementary feeding (p=0,041), and maternal education (p=0,021) and underweight incidence. Logistic regression showed that low maternal education was the most dominant factor (OR=7,26). In conclusion, the role of mothers is very important in child feeding practices. Interventions to reduce underweight should prioritize maternal education and community-based nutrition programs by strengthening the roles of health workers and Integrated Health Post cadres.

The investment risk during the Covid-19 pandemic is difficult to calculate due to increasing uncertainty. The research presents a model that can be used in mitigating short-term investment risk during the Covid-19 Pandemic on the capital market with sectoral gap return base on the difference price between the highest position and the lowest position. The gap may indicate volatility, volume inequality, price abnormalities, directional anomaly, and transaction conspiracy. This paper focused on how to manage portfolio investment risk based on short-term risk mitigation base on gap Analysis of sectoral return compare to Composite Index. The aim to be achieved was to minimize the risk of short-term portfolio investment at the start of the short-term Pandemic in Januari 2020 to August 2020. The specific target to be achieved in this study is to present a model that can increase the yield of short-term investments in the Indonesia Stock Exchange with low level of risk. The object of this research was sectoral idex of stock price whose price movements are in the opposite direction to the composite stock price index. The result of this research shown that the highest gap was basic Industry sector 54,50%. Meanwhile, the lowest gap was consumer sector 22,35%. The highest the gap the bigger the risk.Keywords: Mitigation Model, Investment Risk, Stock Portfolio, Covid-19

Tulisan ini merupakan hasil penelitian untuk mengungkap tentang faktor-faktor yang berpengaruh terhadap prilaku konsumen dalam membeli produk melalui internet.Penelitian ini bertolak dari adanya pergeseran prilaku belanja oleh sebagian anggota masyarakat, dimana membeli produk melalui internet sebelumnya hanya dilakukan oleh masyarakat yang menguasai Teknologi Informasi ataupun kalangan atas.Oleh karena itu tujuan penelitian ini untuk mengetahui Prilaku konsumen dalam memutuskan untuk membeli produk melalui internet, Faktor-faktor yang berpengaruh terhadap pembelian produk melalui internet serta Pengaruh antara faktor-faktor kemudahan, kenyamanan dan effisiensi dalam membeli produk melalui internet dengan prilaku konsumen.Penelitian dilaksanakan menggunakan metode survey. Populasi responden adalah seluruh konsumen yang membeli produk melalui internet. Sebanyak 125 responden diambil sampel dengan menggunakan teknik Acendetal Sampling.Dalam menentukan responden, penulis membegi karakteristik responden menjadi 3 katagori, yaitu konsumen yang berusia antara 15-25 tahun, responden yang kedua berusia antara 26-35 tahun serta responden yang diatas 35 tahun.Dari sisi pkerjaan, penulis juga membagi responden menjadi 3 kategori, yaitu responden yang bekerja sebagai pegawai, sebagai wiraswasta maupun responden yang berstatus mahasiswa.Untuk jumlah penghasilan, penulis mengelompokkan responden yang berpenghasilan antara Rp. 1,000,000 sampai Rp. 5.000.000, yang berpenghasilan 5-15 jutq, serta yang berpenghsiilan diatas Rp.15.000 .000. Pengumpulan data dilakukan dengan menggunakan daftar pertanyaan.Analisis data menggunakan teknik scoring, untuk mengkwantifikasi data kwalitatif. Hasil penelitian menunjukkan bahwa persepsi konsumen terhadap pembelian produk melalui internet secara umum menunjukkan persepsi yang positif, walaupun skor rata-rata yang tidak cukup tinggi. Secara umum tidak terdapat pengaruh yang kuat dari segi social ekonomi konsumen terhadap persepsi konsumen. Baik mengenai kenyamanan, kemudahan dan effisiensi dalam membeli produk melalui internet. Dengan demikian dapat disimpulkan bahwa semakin tinggi tingkat persepsi baik terhadap kemudahan belanja melalui internet, effisiensi waktu dan biaya, kenyamanan belanja maka seseorang akan semakin sering melakukan pembelian produk melalui internet,

Tujuan yang diambil oleh peneliti adalah untuk mengetahui bagaimana tanggung jawab hukum pelaku usaha terhadap peredaran kosmetik yang tidak memiliki izin edar dan untuk mengetahui faktor apa saja yang menjadi kendala terkait pemenuhan tanggung jawab pelaku usaha terhadap peredaran kosmetik yang tidak memiliki izin edar. Sifat penelitian ini menggunakan metode penelitian hukum empiris dengan model yuridis sosiologis mempunyai objek kajian mengenai perilaku masyarakat. Penelitian ini dilaksanakan di Yayasan Lembaga Konsumen Indonesia di Gorontalo. Berdasarkan hasil penelitian, maka dapat disimpulkan bahwa; (1) tanggung jawab hukum pelaku usaha terkait peredaran kosmetik tanpa izin eder merupakan tanggung jawab pelaku usaha apabila produknya menimbulkan kerugian, meski pemenuhan tanggung jawab tersebut sudah diatur dalam Undang-Undang Perlindungan Konsumen mengenai tanggung jawab pelaku usaha, namun masih banyak pelaku usaha kosmetik tanpa izin yang melakukan perbuatan curang dalam memproduksi kosmetik tanpa izin dengan bahan kimia yang didapatkan dengan harga murah tanpa memikirkan dampaknya bagi konsumen yang menggunakan. (2) faktor yang menjadi kendala terkait pemenuhan tanggung jawab pelaku usaha terhadap peredaran kosmetik yang tidak memiliki izin edar yaitu; a) kurangnya kesadaran dalam hal pengawasan yang dilakukan oleh pemerintah terhadap peredaran kosmetik tanpa izin, b) kepedulian dan kesadaran pelaku usaha terhadap keamanan masih rendah, c) pemerintah kurang konsisten dalam menerapkan ketentuan hukum yang mengatur mengenai produk kometik, d) penegakkan hukum masih lemah, dengan penegakkan hukum yang masih lemah membuat para pelaku usaha mengambil kesempatan untuk dapat menggunakan bahan berbahaya tersebut dan dicampurkan pada kosmetik yang akan digunakan oleh konsumen, e) kurang efektif pemberian ganti rugi kepada konsumen apabila dalam waktu 7(tujuh) hari setelah transaksi maka hari ke delapan maka konsumen tdak berhak meminta ganti rugi.

The arrangements regarding the legal protection of passengers and goods on the transport of air, is set out in legislation, agreements, and habits. The air transport law is keperdataan, the provision of air transport to be found in the laws of positive air in Indonesia are: Air Transportation Ordinance Stbl. 1939 No. 100, law No. 1 of 2009, and the Statute No. 8 1999. The responsibility of carrying on the safety of passengers and goods in the implementation of air transportation The principle of presumption of liability /presumtion of/ presumtion fault of negligence. The carrier is responsible for loss suffered by passengers or goods because the sender of a passenger wounded or killed, his baggage or damaged or lost, or damage to goods transfers and the delay in coming, while the principle of limitation of liability. The responsibility of the carrier is limited to a certain amount, this principle which encourages the carrier to resolve the problem by peaceful means. And the principle of absolute liability or strict liability. The carrier is considered to be always responsible without any possibility of freeing themselves unless the aggrieved innocent or were responsible for the losses on him. Compensation given by air carriers is a number of nominal value of money as a form of responsibility for accidents that caused deaths or injuries, lost baggage and flight delays. Legal efforts for passenger who feel or losses can file a lawsuit or claim to the airline, lawsuit or dispute settlement can be reached through two channels, namely the courts and lanes outside the court.