Judul: Kondisi Sosial Ekonomi Usaha Perikanan Tangkap di Pelabuhan Perikanan Pantai Kuala Tungkal Jambi
Abstrak: Tanjung Jabung Barat regency of Jambi province famous for their fisheries business, located on PPP Kuala Tungkal. The main fishing gear in PPP Kuala Tungkal are the gillnet, trawl mini, and togok. Declining fisheries resources due to uncontrollable will affect the fishermen social and economic life. Social aspect measured by fishing operation patterns, source affected by financial loan and social assurance. Economic aspect measured by fishermen income level in the fishing effort. Social and economic conditions of fishing communities around PPP Kuala Tungkal is very important to be studied in order to know the level of fishermen prosperity and used to fix fishing patterns system in PPP Kuala Tungkal Jambi. There for, the research conducted with survey methods through interviews with fishermen to know the social and economic conditions of fishermen in PPP Kuala Tungkal. Social conditions from the pattern of fishing operation carried out in one day and still, the most desirable source is touke, and there is no social assurance received by fishermen in PPP Kuala Tungkal. Economic conditions are still favorable, measured from the amount of venture investment, revenues, cost, profits, R/C value and NPV value. Business gillnet and trawl mini generate profits because R/C>1 and NPV>1, so that the business gillnet and trawl mini still feasible, while business of togok generate profits with R/C>1, but NPV<1, so that this business losses.
Keyword: Bogor Agricultural University (IPB), togok, trawl mini, gillnet, Kuala Tungkal, economic condition, social condition

Judul: Analysis of Fishers Enthusiasm in Utilization of Tanjung Adhikarta Fishing Port, Kulon Progo Regency.
Abstrak: Pelabuhan Perikanan Tanjung Adhikarta (PPTA) di Kabupaten Kulon Progo, Pesisir Daerah Istimewa Yogyakarta (DIY) diproyeksikan menjadi pusat pertumbuhan ekonomi dimana terdapat layanan usaha perikanan tangkap. Namun belum dimanfaatkan secara optimal oleh nelayan dan masyarakat setempat. Penelitian ini bertujuan untuk mengidentifikasi faktor pendorong, penghambat dan animo nelayan dalam melakukan kegiatan perikanan tangkap dengan PPTA sebagai basis. Subjek penelitian ini meliputi nelayan, pegawai pelabuhan dan stakeholder’s lainnya. Secara keseluruhan, ada empat faktor pendorong nelayan dan masyarakat dalam melakukan kegiatan perikanan tangkap, yaitu harga ikan yang relatif stabil, kemudahan masyaakat mendapatkan pelayanan, tidak ada praktek KKN dan tempat pelelangan ikan (TPI) yang beroperasi normal. Empat faktor penghambat nelayan dan masyarakat melakukan kegiatan perikanan tangkap di PPTA adalah pasar ikan yang tidak beroperasi maksimal, suplai bahan baku ikan yang minim, alat peralatan perbengkelan kapal tidak lengkap dan area perbengkelan yang ada tidak dimanfaatkan. Selain itu, kualitas pelayanan pelabuhan menurut para nelayan masih berada di bawah harapan, dengan 4 faktor pelayanan yang harus ditingkatkan, yakni terkait penyediaan bahan baku, stabilitas harga, pemanfaatan bengkel, dan sarana prasarana peralatan bengkel kapal. Nelayan juga merekomendasikan agar keberadaan TPI tetap dipertahankan. Faktor-faktor lainnya dianggap kurang penting namun seyogianya tetap menjadi diwaspadai karena sewaktu-waktu bisa menjadi permasalahan yang tidak terduga., Tanjung Adhikarta Fishing Port (TAFP) in Kulon Progo Regency, a coastal region of Yogyakarta (DIY), is projected to be an economic growth centre where services capture fishery and other business types are located. However, if local fishers and communities have not optimally utilized this facility, it is classified as one wasted development output. This study aims to identify the fishers and local community's driving factors, obstacles, and enthusiasm for using the port. The subjects of this study include fish, port employees, and other stakeholders. On the one hand, four driving factors encourage fishermen to carry out fisheries activities at the port: stable fish prices, ease in services, absence of corruption, collusion and nepotism, and operational fish auction hall. On the other hand, there are four obstacles: the poor operation of the fish market, minimal supply of fish, incomplete equipment in the ship workshop, and an unutilized workshop area. Fishers consider the quality of port services is still below their expectations, and improvement is needed for the supply of fish, fish price stability, utilization of workshops, and infrastructure for ship workshop equipment. Fishers recommend that the existing fish auction is maintained. Other factors are considered less important but be cautious about anticipating an unexpected problem in the future.
Keyword: fishermen's interest, capture fisheries activities, Kulonprogo, TAFP

Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
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