Judul: Penentuan Lokasi Budidaya Kerapu Macan (Epinephelus Fuscoguttatus) Menggunakan Sistem Informasi Geografis (Studi Kasus di Perairan Kabupaten Sinjai)
Abstrak: Brown-Marbled grouper (Epinephelus fuscoguttatus) is a reef fish that have high economic value and is now cultured in the Sembilan Islands Waters, Sinjai District. This study aims to determine the suitability of the Sinjai District waters for brown-marbled grouper aquaculture develeopment based on waters parameters data which includes water depth, surface temperature, DO, pH, salinity, ammonia, surface current, brightness, and high waves. The data of each parameter, as points, are mapped. Then they are formed a contour in which the predetermined the next point is processed to form the contour, which is then inserted predetermined suitability values is inserted. The next step is to overlay and analyze those results produce Suitability Region Map For the brown marbled grouper Aquaculture. Area that are very suitable for the brown-marbled grouper aquaculture (S1) covering 58,84 km2 or approximately 11,27 %, suitable (S2) covering 463,24 km2 or approximately 88,73 %.
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Judul: Analysis of the suitability of floating net cages for Grouper (Epinephelus sp.) in Sebesi and Sebuku Waters, South Lampung
Abstrak: Indonesia memiliki perairan yang luas dengan terdiri dari negara yang berbentuk kepulauan. Luas laut Indonesia mencapai 3,25 juta km2 dan 2,55 juta km2 adalah zona eksklusif ekonomi (ZEE). Luasnya lautan ini memiliki potensi yang besar dalam bidang perikanan budidaya maritim atau marikultur. Kelayakan lokasi merupakan salah satu upaya untuk keberhasilan dalam kegiatan budidaya. Kelayakan lokasi yang tidak cocok bagi komoditas yang dibudidayakan akan menyebabkan budidaya tersebut tidak berlangsung lama (Estigade et al. 2018). Perkembangan teknologi masa kini dapat dilakukan dengan menggunakan SIG untuk mengetahui kelayakan suatu lokasi. Penelitian ini bertujuan menganalisis kesesuaian budidaya keramba jaring apung ikan kerapu dengan menggunakan pemetaan. Penelitian dilaksanakan pada Agustus 2021 di perairan Pulau Sebesi dan Sebuku, Kabupaten Lampung Selatan, Provinsi Lampung. Pengukuran kualitas air dilakukan secara in-situ dan ex-situ meliputi suhu, dissolved oxygen (DO), derajat keasaman (pH), kecerahan, kedalaman, kecepatan arus, gelombang, salinitas, nitrat, fosfat, amonia, substrat dasar, dan keterlindungan. Data hasil setiap parameter dianalisis menggunakan perbandingan modifikasi matriks kesesuaian lahan budidaya, pembobotan dan skoring, perhitungan indeks kesesuaian, penentuan kelas kesesuaian dari jenis budidaya tertentu, serta analisis secara spasial menggunakan program Arc GIS 10.8. Hasil menunjukkan Terdapat dua lokasi yang termasuk dalam kelas sangat sesuai (S1) yaitu Lokasi Kayu Duri dan Pelabuhan Sirih. Selain itu, lokasi penelitian lainnya termasuk dalam kelas sesuai (S2) yaitu Cemara, Keramba, Teluk Bera, dan Teluk Bangke. Area yang dapat mendukung budidaya ikan kerapu di KJA pada perairan Pulau Sebesi dan Sebuku seluas 341,514 ha (9,28%) yang masuk ke dalam kategori S1 (sangat sesuai), seluas 2492 ha (67,71%) yang masuk ke dalam kategori S2 (sesuai) dan 847,0001 ha (23,01%) yang masuk ke dalam kategori S3 (tidak sesuai) dari total luas lahan perairan untuk budidaya kerapu sebesar 3680,5141 ha., Indonesia has wide coastal area due to its archipelagic country with sea area reaches 3.25 million km2 with 2.55 million km2 is an exclusive economic zone (EEZ). The extent of this marine area has great potential in the field of mariculture. Suitable location is one of the efforts for success in cultivation activities. Today's technological developments can be done using GIS for location eligibility. The feasibility of a location that is not suitable for cultivated commodities will cause the cultivation to not last long (Estigade et al. 2018). This study aims to analyze the suitability of grouper floating net cage cultivation using GIS. The research was conducted in August 2021 in the waters of Sebesi and Sebuku Islands, South Lampung Regency, Lampung Province. Water quality measurements were carried out in-situ and ex-situ. The resulting data for each parameter were analyzed using a modified comparison of the cultivation land suitability matrix, weighting and scoring, calculation of the suitability index, determination of suitability classes for certain types of cultivation, and spatial analysis using the Arc GIS 10.8 program. The results show that there are two locations that are included in the very suitable class (S1), namely the Location of Kayu Duri and Pelabuhan Sirih. In addition, other research locations are included in the appropriate class (S2), namely Cemara, Keramba, Teluk Bera, and Teluk Bangke. Areas that can support grouper cultivation in KJA in the waters of
Keyword: floating net cage, grouper, mariculture, GIS

Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell