Judul: Pengaruh Coastal Upwelling di Utara Kontinen Papua dan Gelombang Ekuatorial Rossby Terhadap Produktivitas Perairan dan Perikanan Tuna di Barat Pasifik Warm Pool
Abstrak: Perairan Barat Pasifik Warm Pool (BPWP) merupakan perairan oligotropik karena keberadaan lapisan penghalang salinitas tinggi yang menyulitkan pencampuran antara air permukaan rendah nutrien dengan pinoklin. Namun demikian, perairan mampu menyuplai lebih dari 25% hasil tangkapan tuna dunia yang didominasi oleh Cakalang (Katsuwonus pelamis), Madidihang (Thunnus albacares), Tuna Mata Besar (Thunnus obesus) dan Albacore (Thunnus alalunga). Kemampuan ini diduga dipengaruhi oleh kejadian coastal upwelling di utara kontinen Papua dan gelombang ekuatorial Rossby selama ENSO. Studi ini bertujuan untuk mengkaji mekanisme dan pengaruh coastal upwelling dan gelombang Rossby terhadap kesuburan perairan dan perikanan tuna di perairan BPWP selama ENSO. Studi menggunakan metode eksploratif dengan menggabungkan metode penginderaan jauh satelit, mooring (Triton Buoy Mooring & ARGO Drifter), Nasa Ocean Biogeochemical Model (NOBM), dan penangkapan tuna menggunakan armada Purse seine. Hasil studi menunjukkan bahwa coastal upwelling di utara kontinen Papua dihasilkan sebagai respons perairan terhadap angin barat dan anomalinya (WWBs) melalui mekanisme transport Ekman, anomali NGCC dan NGCUC, dan adveksi gelombang Rossby (kutub rambatan utara) dari timur Filipina melengkung ke pesisir dan perairan oseanik utara kontinen Papua selama musim barat. Di bawah pengaruh coastal upwelling peningkatan produktivitas primer perairan oseanik terjadi melalui transport Ekman, dan anomali NGCC dan NGCUC yang menumpukan massa air taikan dan perairan pesisir yang kaya nutrien di sekitar ekuator. Asupan nutrien baru yang disebabkan oleh gelombang Rossby terjadi melalui efek rototiller gelombang Rossby yang mengangkat nitraklin dan kedalaman klorofil-a maksimum (DCM) ke lapisan tercampur (MLD) di puncak gelombang utama dan menenggelamkan air permukaan yang rendah nutrien dan DCM lebih dalam di lembah gelombang. Meningkatnya produktivitas primer di permukaan perairan diperlihatkan melalui tingginya konsentrasi klorofil-a dan total klorofil (blooming fitoplankton) di daerah gangguan. Hasil perhitungan kontribusi coastal upwelling dalam peningkatan produktivitas primer perairan pesisir dan oseanik adalah 73% dan 68%. Nilai ini lebih tinggi dari kontribusi gelombang Rossby (<40%) di perairan BPWP dan perairan oligotropik lainnya. Hal ini disebabkan oleh (a) taikan nitraklin dan DCM hanya mencapai kedalaman dangkal di atas dasar MLD dan dalam jangkauan zona kedalaman optikal SeaWIFS (25 – 40 m) sedangkan proporsi terbesar konsentrasi klorofil-a yang tinggi berada di bawah kedua kedalaman tersebut, (b) kosentrasi besi terlarut (FeD) yang tinggi di perairan selama ENSO membatasi pertumbuhan mikrofitoplankton tertentu, dan (c) laju konsumsi group Diatom yang tinggi oleh mesozooplankton yang melimpah di daerah taikan. Respons perairan sebagai dampak dari kedua mekanisme ini juga diperlihatkan melalui peningkatan kelimpahan group fitoplankton Cyanobacteria dan Coccolithophores di wilayah asupan nutrien baru sekaligus mendominasi fluoresensi fitoplankton di perairan. Sebaliknya, group Diatom dan Chlorophytes memiliki kelimpahan rendah. Hal ini disebabkan karena laju konsumsi yang tinggi mesozooplankton seperti kopepoda dan konsentrasi FeD yang tinggi diperairan membatasi pertumbuhan kedua group fitoplankton tersebut. konsekuensinya, perairan didominasi oleh mesozooplankton dan kelimpahan tinggi biomassa mikronekton yang tersedia sebagai makanan tuna (prey) di daerah gangguan. Hasil sintesis penelitian sebelumnya juga menunjukkan bahwa kelimpahan yang tinggi group Cyanobacteria (terutama genus Prochloroccosus) dalam DCM berhubungan dengan biomassa yang tinggi mikronekton di lapisan tersebut. Dengan demikian, tuna dengan kebutuhan energi yang tinggi cenderung hadir pada daerah dengan konsentrasi makanan tuna yang tinggi seperti daerah gangguan dan dalam DCM. Indikasi ini tercermin melalui kelimpahan dan laju
Keyword: coastal upwelling, gelombang ekuatorial Rossby, nitraklin, kedalaman klorofil-a maksimum, microbial loop

Judul: Pengaruh Coastal Upwelling di Utara Kontinen Papua dan Gelombang Ekuatorial Rossby Terhadap Produktivitas Perairan dan Perikanan Tuna di Barat Pasifik Warm Pool.
Abstrak: The Western Pacific Warm Pool (WPWP) waters is oligotrophic waters due to the existence of high salinity barrier layer which complicate mixing between low nutrient surface water with pycnocline layer. However, these waters able to supply more than 25% word tuna catches that dominated by Skipjack tuna (Katsuwonus pelamis), Yellowfin tuna (Thunnus albacares), Bigeye tuna (Thunnus obesus), and Albacore (Thunnus alalunga). This ability is thought to be influence by coastal upwelling in the north of Papua continent and equatorial Rossby wave event during ENSO. This study aims to examine the mechanism and influence of coastal upwelling and equatorial Rossby wave on primary productivity and tuna fisheries in the WPWP waters during ENSO. The study using exploratory methods by combining the methods of remote sensing satellite, mooring (Triton Buoy Mooring & ARGO Drifter), Nasa Ocean Biogeochemical Model (NOBM), and tuna fishing using Purse seine fleet. The study results showed that coastal upwelling in the north of Papua continent produced in response to the westerly wind and anomalies (WWBs) through the mechanisms of the Ekman transport, NGCC and NGCUC anomalies, and advection of equatorial Rossby wave (the north pole propagation) from the east of phillipines curved to coastal and oceanic waters north of Papua continent during west moonson. Under the influnce of coastal upwelling, enhancement of primary productivity of oceanic waters occurs through Ekman transport and NGCC and NGCUC anomalies which concentrate upwelling water masses and nutrient rich of coastal waters around the equator. The new nutrient input caused by Rossby waves occur through rototiller effect of Rossby wave which lifted nitracline and deep chlorophyll-a maximum (DCM) to the mixed layer (MLD) at the crest of the main wave and sink the low nutrien surface water and DCM deeper in the trough wave. Increased of primary productivity in surface waters is shown by the high concentration of chlorophyll-a and total chlorophyll (phytoplankton blooming) in the area of disturbance. The calculation result of coastal upwelling contribution to increased of primary productivity in coastal and oceanic waters are 73% and 68%. This value is higher than contribution of equatorial Rossby wave (<40%) in WCPW waters during ENSO either or other oligotrophic waters. It is caused by (a) upwelling of nitracline and DCM only reach shallow depth on the base of MLD and within range of SeaWIFS optical depth zone (25 – 40 m) while largest proportion of high chlorophyll-a concentration below both of the depth, (b) a high concentration of dissolved iron (FeD) in the waters during the ENSO restrictive the growth of specific microphytoplankton,and (c) a high consumtion rate of Diatom group by mesozooplankton are abundance in the upwelling area. Waters response as a result of these mechanisms is also shown by increased abudance of Cyanobacteria and Coccolithophores phytoplankton group in the area of new nutrient input and simultaneously dominate phytoplankton fluorescence in the waters. On the contrary, Diatom and Chlorophytes phytoplankton group have a low abudance. It is caused by high grazing rate of mesozooplankton such as copepoda and high concentration of FeD in the waters restrictive the growth both of phytoplankton group. Consequently,
Keyword: coastal upwelling, equatorial Rossby wave, nitracline, Deep Chlorophyll-a maximum, microbial loop

Judul: Pengembangan Aplikasi Pencarian Tempat Berbasis Mobile
Abstrak: Searching for a room in the building at a new area or even a frequently visited area may be a problem for some people. The purpose of this research is to develop a location based services (LBS) application which can search a place with the user’s current position as a reference. Place in this research is a room inside the building, such as classroom, laboratory, and auditorium. This research is conducted in several stages, the first is application development planning based on related references. The second is system requirement analysis, such as hardware specification and data. After that, the system is designed and implemented based on the previous two iterations of analysis, and finally, the system is tested for each function. The application is developed on Android platform using Google Maps API version two. User’s location coordinate is obtained by using assisted global positioning system ( A-GPS ) which can utilize the services from the service provider to determine the user's position at current time. This research’s result is an application that capable to show a route to the desired room along with its associated distance, travel time and room layout information.
Keyword: room search, place search, location based service, Google Maps Api, Android