Judul: Studi sosial ekonomi dan persepsi masyarakat terhadap Corporate Social Responsibility (CSR) perusahaan hutan tanaman industri PT. Nityasa Idola di Kalimantan Barat
Abstrak: Sebagai salah satu pelaku dalam pembangunan ekonomi nasional, sebuah perusahaan sudah seharusnya memperhatikan aspek ekonomi, sosial, dan lingkungan sekitarnya. PT Nityasa Idola merupakan salah satu perusahaan yang memegang sertifikat IUPHHK-HTI, telah menjalankan program CSR dalam upaya tanggung jawab sosial bagi masyarakat sekitarnya. Selain merupakan tanggung jawab sosial perusahaan, kegiatan CSR yang dilakukan oleh PT Nityasa Idola untuk meraih simpati masyarakat agar dapat memperoleh izin dalam pemanfaatan lahan konsesi yang diklaim milik masyarakat. Namun hasil kegiatan CSR belum memberikan feedback positif bagi perusahaan dalam meningkatkan produksi tanam. Tujuan dari penelitian ini adalah untuk mengetahui kondisi sosial ekonomi masyarakat sekitar perusahaan, mengevaluasi implementasi CSR perusahaan, dan menganalisis persepsi masyarakat sekitar perusahaan. Metode penelitian yang digunakan adalah analisis deskriptif, analisis garis kemiskinan Sajogyo (1996), analisis skala Likert dan analisis trend linear. Analisis deskriptif digunakan untuk menjelaskan kondisi sosial masyarakat dan implementasi kegiatan CSR perusahaan. Analisis garis kemiskinan Sajogyo digunakan untuk mengetahui kondisi ekonomi masyarakat. Sedangkan analisis skala Likert dan trend linear digunakan untuk mengetahui persepsi masyarakat terhadap perusahaan. Berdasarkan hasil observasi lapang diketahui bahwa implementasi CSR sudah dirasakan cukup bermanfaat bagi masyarakat. Perusahaan belum merasakan feedback positif implementasi CSR dari masyarakat dalam meningkatkan produksi tanam disebabkan rendahnya kinerja perusahaan dalam menjalankan hasil kerjasama lahan bersama masyarakat. Oleh karena itu perusahaan seharusnya memperbaiki kinerja teknis di lapangan serta menyusun program CSR jangka pendek dan jangka panjang yang lebih sistematis.
Keyword: 

Judul: Rencana kelola sosial dalam rangka Pembinaan Masyarakat Desa Hutan (PMDH) pada Hutan Tanaman Industri PT Nityasa Idola di Kalimantan Barat
Abstrak: Development of Industrial Forests (HTI), particularly outside Java often faced with complex problems. These problems arise due to the overlapping area between the concession companies to the area controlled by the community. This occurred in the area of Business License Utilization of Forest Plantation Timber (IUPHHK HT) PT. Nityasa Idol in West Kalimantan. Thus, firms in an effort to conduct activities for the development of timber planting need to reconcile with the community, such as every hectare of land that cooperation will be given a replacement of Rp. 60.000/hektar, tree spacing results conducted on the half-cycle (4 years) of Rp. 2.500/m3, obtained from logging during harvest (8 years) of Rp. 5,000 / m3, and the provision of free rubber seedlings were 21 stems / ha. But the company still offers less public attention, this is caused the land still be planted of rubber trees and agricultural shifting cultivation, which assessed the value of a small compensation, and lack of public understanding of the existence of HTI. Social relations among villages surrounding the management company IUPHHK HT PT. Nityasa Idol has been running through a program of activities PMDH. Programs that have run companies, such as training programs and making permanent agriculture, land cooperation with treaty land compensation, educational assistance for teacher salaries, and other social assistance. The program has not been going well so necessary in the evaluation, such as the lack of follow-up assistance training program, not optimal settled agricultural activities, because of lack of socialization and mentoring, the need for optimization of assistance that leads to an increase of places of worship, education, and health, increase cooperation and participation of community leaders, evaluating the content of the land compensation agreement, including the implementation of payment, planting and maintenance activities, lack of employee skills, such as knowledge of the forest industry plants and communication techniques. The problems faced in the implementation of such programs is the number of villages PMDH partner, limited executive power PMDH, lack of good cooperation between companies and local governments, the lack of implementation of activities PMDH, not PMDH activities periodically. But we realize people were also influential factors, such as socio-economic conditions of society, namely shifting cultivation and land activities sebaai fuel economic activity, has not been fully able to accept the changes and innovations from the outside in a positive, business activities are still influenced by customary or traditional.
Keyword: 

Judul: Dynamical System of Hepatitis B in Three Groups with Vaccination
Abstrak: The aim of this study is to modify the hepatitis B transmission model in three age groups involving vaccination from the model conducted by Zhoe and Zhang.The method used is to analyze the stability of the fixed point and its basic reproduction number (R_0). Performed stability analysis and numerical simulation to see population dynamics. Next, a sensitivity analysis of the parameters was carried out to see its effect on R_0. From the analysis obtained two fixed points, namely non-endemic and endemic fixed points. Non-endemic fixed points are locally asymptotically stable if R_0 <1 Meanwhile, the endemic fixed point is locally asymptotically stable if R_0 > 1. Hepatitis vaccination affects the number of susceptible population, because the more successful the vaccination, the smaller the number of susceptible populations so that the smaller the population will be infected.
Keyword: Dynamic, Hepatitis B, Vaccine, Mathematical model