Judul: The Contribution of the Pekalongan  Fishing Port to the Pekalongan Regional Economy Central Java
Abstrak: Informasi mengenai perekonomian daerah Pekalongan diperlukan untuk mengetahui kontribusi Pelabuhan Perikanan Nusantara (PPN) Pekalongan. Kontribusi tersebut dapat meningkatkan ekonomi daerah Pekalongan sehingga diperlukan strategi yang harus dilakukan untuk pengembangan PPN Pekalongan. Penelitian ini bertujuan untuk mengidentifikasi aktivitas ekonomi di PPN Pekalongan, menentukan kontribusi PPN Pekalongan terhadap ekonomi daerah Pekalongan dari segi tenaga kerja dan pendapatan, dan merumuskan strategi peningkatan kontribusi PPN Pekalongan. Pengumpulan data dilakukan melalui wawancara kepada pihak pelabuhan dan masyarakat yang memiliki usaha berada di Kawasan PPN Pekalongan menggunakan metode accidental sampling. Analisis data yaitu metode deskriptif yang dianalisis menggunakan perhitungan proporsi, multiplier effect dan matriks Strenghts, Weakness, Opportunities, Threats (SWOT). Hasil penelitian menunjukkan aktivitas perekonomian di Kawasan PPN Pekalongan terdiri dari banyak jenis usaha diantaranya rumah makan, warung kelontong, nelayan, bakul, nahkoda, docking, galangan, bahan bakar solar, pengolah, kelompok asosiasi di Tempat Pelelangan Ikan (TPI), pedagang kaki lima, dan tukang becak. Kontribusi PPN Pekalongan terhadap Pendapatan Asli Daerah (PAD) Kota Pekalongan dengan indikator pendapatan dan tenaga kerja tertinggi sebesar 2,49% dan 9,60%. Strategi yang dapat dipertimbangkan dalam pengembangan PPN Pekalongan yaitu strategi S-O (strenghts-opportunities)., Information about the Pekalongan regional economy is needed to determine the contribution of the Pekalongan Fishing Port. This contribution can improve the economy of the Pekalongan area, and a strategy is necessary to develop the Pekalongan Fishing Port. This study aims to identify economic activities in Pekalongan Fishing Port, determine the contribution of Pekalongan Fishing Port to the Pekalongan regional economy in terms of labor and income, and formulate a strategy to increase the contribution of Pekalongan Fishing Port. Data was collected through interviews with the port and people who have businesses in the Pekalongan Fishing Port area using the accidental sampling method. Data analysis is the descriptive method using proportion calculation, multiplier effect, and SWOT matrix. The results showed that economic activity in the Pekalongan Fishing Port area consisted of many types of businesses, including restaurants, grocery stalls, fishermen, baskets, captains, docking, shipyards, diesel fuel, processors, association groups at TPI, street vendors, and a pedicab driver. The contribution of Pekalongan Fishing Port to Pekalongan City's Original Regional Revenue with the highest income and labor indicators of 2.49% and 9.60%. The strategy that can be considered in developing Pekalongan Fishing Port is the S-O (strengths-opportunities) strategy.
Keyword: contribution, income, labor, Pekalongan Archipelagic Fishing Port, SWOT

Judul: Peran Subsektor Perikanan Tangkap terhadap Pembangunan Daerah serta Komoditas Hasil Tangkapan Unggulan di Kota Pekalongan
Abstrak: Pekalongan city has quite potential aquatic resources. Average annual production value was 57.409.699 kg or 27.45% of Central Java province total production which was 209.149.881 kg. This can be used maximally to improve the contribution to PDRB. Therefore it is necessary to formulate a development strategy aimed at enhancing the role of the capture fisheries sector in regional development. The results indicate that the LQ calculations based on the indicators of GDP and employment is a sector basis with LQ values greater than 1. Based on the analysis of the multiplier effect during the period 2003-2008, GDP indicator and the indicator of labor, capture fisheries sub-sector gave a positive impact on regional development of Pekalongan city. Based on the determination of superior fishery sub-sectors commodities, such as manyung (Arius sp.) from demersal fishes. Small pelagic group of selar (Caranx leptolepis), layang (Decapterus rocelli), tembang (Clupea fimbriata), lemuru (Clupea longiceps), kembung (Rastelliger). Large pelagic group of tongkol (Euthynnus spp) and tenggiri (Scomberomerus commersoni). Soft animal group are squids (Loligo sp.). SWOT analysis resulted three alternative development strategy, which are 1) Focusing on improving the captured quality by maximizing fish transport vessels and quality testing laboratory to produce high quality fresh and processed fish products, which have high economic value and provide convenience to the public on access to facilities and infrastructure in new business development in the field of fisheries; 2) Develop a sustainable fisheries sector through the use of the opportunities for employment and high quality of capture product to increase the contribution of capture fisheries toward regional PDRB; and 3) Provide convenience for fisherman in all regulations and documents, so that fishermen can remain consistent and able to use the potential of marine resources that are available and can meet the demand for products from outside the area.
Keyword: 

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.
Keyword: