Judul: Analisis Risiko dan Optimasi Kinerja Portofolio Investasi Dana Pensiun Pertamina.
Abstrak: Pengelolaan investasi perusahaan dana pensiun dilakukan dengan tujuan menghasilkan return optimal sesuai dengan peraturan perundang-undangan dan investment policy perusahaan agar terciptanya Good Pensiun Fund Governance (GPFG) serta Risk Management. Penelitian ini bertujuan untuk : (1) Mengevaluasi kinerja portofolio investasi Dana Pensiun Pertamina, (2) Menganalisis pengaruh return instrumen investasi terhadap return portofolio investasi, (3) Menganalisis komposisi alokasi portofolio investasi optimal dengan batasan alokasi investasi serta mengestimasi kebutuhan dana untuk mitigasi risiko. Data yang digunakan adalah data sekunder. Metode analisis yang digunakan adalah Single Index Model, Analisis Regresi Linier Berganda, serta Analisis Value at Risk (VaR). Berdasarkan Analisis Single Index Model, portofolio optimal terdiri atas 14.96% deposito, 16.84% saham, 21.33% obligasi, 22.25% Surat Berharga Negara (SBN), 17.53% sukuk, 1.57% penempatan langsung, serta 5.53% tanah dan bangunan. Return dan risiko dari portofolio optimal sebesar 5.52% dan 0.015. Hasil Analisis Value at Risk (VaR), probabilitas kerugian maksimal yang akan terjadi sebesar Rp 184 983 079 820.
Keyword: dana pensiun, portofolio investasi, portofolio optimal, return, risiko

Judul: Analysis of Investment PortfolioPerformance Optimization (Case Study of PT Freeport Indonesia Pension Fund)
Abstrak: The development of pension funds through investment in Indonesia is regulated in the constitution and one of the ways to obtain optimal investment returns is to form a portfolio. The Markowitz model helps investors determine which investment assets are includes in the optimal portfolio. Strategies to minimize risk and maximize return are very important. The types of assets that will be optimized in this research are Savings at Banks, On-Call Deposits, Time Deposits, Certificates of Bank Indonesia, GovernmentBonds, Stocks,Corporation Bonds, Fixed Income Mutual Funds and Stock Mutual Funds at PT Freeport Indonesia Pension Fund(DPFI) period 2007-2020 using the single index model (SIM), capital asset pricing model (CAPM) and tangency portfolio. The most optimal performance is shown by the tangency portfolio method by maximizing the value of tan-�and the calculation results showthat 4 out of 9 investment assets, namely bank savings, on-call deposits, stocks andcorporate bonds, are includes in the optimal portfolio with a portfolio return of92.62% higher 56% of historical DPFI and portfolio risk 1,5842 an increases of 140% from historical DPFI as well as proposed changes in asset allocation dominantly in stocks by 40% and three investment assets, namely savings in banks, on-call deposits and corporationbonds with a weight of 20% each . Furthermore, stock investment assets wereoptimized using the tangency portfolio method and obtained 24.02% return that 8.92% higher than DPFI's historical return and 0.37729 risk that 14.17% greater than DPFI's historical risk by optimizing 8 of 34 stock issuers and proposed changes evenly allocated 12.5%,namely UNVR or an increases of 9.24%, AALI or an increase of 3.17%, TINS or an increase of 11.87%, MEDC or an increase of 12.13%, PGAS or an increase of 10.94%, BBNI or an increase of 10.10%, UNSP or an increase of 10.33% and ISAT or an increaseof 9.73%.
Keyword: PTFI Pension Fund, SIM, CAPM, Tangency portfolio, Portfolio Optimization

Judul: Biology and ecology of the buffalo fly, haematobia exigua de meijere (diptera:muscidae)
Abstrak: The life history of the buffalo fly was observed at room temperature of 27°-29.5°C and at a relative humidity of 48-68 percent. The eggs hatched after 17-22 hours, with an average of 18 hours. First instar larvae measured 1.25 + 0.16 mm long and 0.27 + 0.037 mm wide. reach the second larval stage. It took 6-12 hours to the second instar larvae measured 2.676 +0.187 mm long and 0.353 +0.028 mm wide. The second instar took about 12-24 hours to reach the third larval stage. The third instar measured 6.833 + 0.189 mm long and 0.919 + 0.051 mm wide. It took about 2-3 days for the third instar to become pupae. Duration of the pupal stage was about 5-7 days before the adults emerged. Under laboratory condition, the buffalo fly completed its life cycle in 9.5 to 10.5 days, whereas under field condition it took 9-14 days with an average of 10.5 days. The growth ratio which was based on the measurements of the cephalo-pharyngeal skeleton of each instar was 1.797. The preoviposition period was 8-12 days and mating usually occurred on the 6th or 7th day. The longevity of the male was 29 days, whereas it was 32 days in the female. The range of egg production under laboratory condition was between 20-139 per female fly. The belly and hind legs of the carabao were the most preferred habitat either during cloudy and cool dry or shiny and warm day. When the weather was clear and the carabao was in the shade, the flies tended to be more distributed particularly on the shoulder, dewlap, back and horns. The carabaos had relatively fewer Musca sp. and Stomoxys calcitrans than cattle; never the less carabaos had a higher infestation of buffalo fly than cattle. Oviposition occured either during the day or night but the buffalo flies were more active during the night than in the day time. The effect of various lengths of exposure time of manure in relation to the oviposition was profound. observed, the maximum number of the buffalo flies was occurred when the dung was exposed for 30 minutes. With increasing time of exposure the number and variety of insects also increase. It was evident that Sepsidae and psychodidae were the most dominant insects emerging from the dung. The number of buffalo flies also increased with increasing
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