Judul: Analisis struktur Modal yang Optimum pada Perusahaan Telekomunikasi yang Terdaftar di BEI
Abstrak: Capital structure is an equalization between the use of own capital and the loan. Weighted average cost of capital (WACC) concept is used on the condition when the company apply combination of several sources of fund. From this research it is known that the telecommunication industry has capital structure which is dominated by Common Stocks with an average proportion of 54.21%, bonds about 38,90% and the rest is preferred stock 9,81%. From the WACC calculation, it can be seen that the telecommunication industry has the WACC about 12,41%. while, based on the calculation of firm value, the company in sector of telecommunication industry has average firm value which is higher than the book value. By the WACC and firm value calculation, PT. Indosat Tbk. has capital structure that’s optimum, and PT. XL Axiata Tbk. does not quiet optimum. It is expected that PT. XL Axiata Tbk. can minimalized the cost of capital to increasing the firm value. Meanwhile, the WACC concept does not apply to PT. Telekomunikasi Indonesia Tbk.
Keyword: optimal capital structure, cost of capital, firm value, capital Structure

Judul: Optimal Capital Structure, Investment Decision, Liquidity and Firm's Value in Telecommunication's Sector
Abstrak: Perusahaan mempunyai tujuan untuk meningkatkan nilai perusahaan karena semakin tinggi nilai perusahaan maka akan meningkatkan kemakmuran bagi para pemegang saham, sehingga para pemegang saham akan menginvestasikan modalnya kepada perusahaan tersebut. Nilai perusahaan merupakan persepsi investor terhadap tingkat keberhasilan perusahaan yang dikaitkan dengan harga saham karena harga pasar saham perusahaan mencerminkan penilaian investor atas keseluruhan ekuitas yang dimiliki. Semakin tinggi harga saham maka nilai perusahaan dan kemakmuran pemegang saham juga akan meningkat. Dalam penelitian ini faktor-faktor yang memengaruhi nilai perusahaan, struktur modal optimal dan variabel yang paling dominan dalam memengaruhi nilai perusahaan akan dipelajari. Populasi penelitian ini terdiri dari perusahaan telekomunikasi yang terdaftar di Bursa Efek Indonesia dalam periode 2009 hingga 2018. Hasil penelitian menunjukkan bahwa struktur modal dan keputusan investasi berpengaruh terhadap nilai perusahaan, sementara likuiditas, profitabilitas dan pertumbuhan perusahaan tidak berpengaruh terhadap nilai perusahaan. Selain itu penggunaan komposisi struktur modal optimal berada pada kisaran 20% utang jangka panjang dan 80% saham biasa untuk perusahaan TLKM. Pada perusahaan ISAT komposisi struktur modal optimal berada pada kisaran 28% saham biasa dan 72% saham preferen. Pada perusahaan EXCL komposisi struktur modal optimal berada pada kisaran 53% utang jangka panjang dan 47% saham preferen. Pada perusahaan FREN komposisi struktur modal optimal berada pada kisaran 28% utang jangka panjang dan 72% saham preferen. Sementara pada perusahaan BTEL komposisi struktur modal optimal berada pada kisaran 52% utang jangka panjang dan 48% saham preferen, agar menghasilkan biaya modal yang minimum serta nilai perusahaan yang maksimum. Untuk variabel yang paling dominan memengaruhi nilai perusahaan adalah struktur modal dan keputusan investasi dengan kriteria inelastis., The company has a goal to increase the firm’s value because the higher the value of the company will increase prosperity for shareholders, so the shareholders will invest their capital in the company. Firm’s value is the investor's perception of the level of success of the company that is associated with stock prices because the market price of the company's shares reflects the investor's assessment of the overall equity owned. The higher the stock price, the value of the company and the prosperity of shareholders will also increase. In this research the factors that influence firm value, optimal capital structure and the most dominant variables in influencing company value will be studied. The population of this study consists of telecommunications companies listed on the Indonesia Stock Exchange in the period 2009 to 2018. The results showed that capital structure and investment decisions affect the firm’s value, while liquidity, profitability and company growth do not affect the firm’s value. In addition, the optimal use of the capital structure composition is in the range of 20% long-term debt and 80% ordinary shares for TLKM companies. In ISAT company the optimal capital structure composition is in the range of 28% common shares and 72% preferred shares. In the EXCL company, the optimal capital structure composition is in the range of 53% long-term debt and 47% preferred stock. In FREN company, the optimal capital structure composition is in the range of 28% long-term debt and 72% preferred stock. Meanwhile, for BTEL, the optimal capital structure composition is in the range
Keyword: Struktur Modal Optimal, Keputusan Investasi, Likuiditas, Nilai Perusahaan, Capital Structure, Investment Decision, Liquidity, Optimal Capital Structure

Judul: Macroalgae development as feeding stimulants for the adult sea urchin (Tripneustes gratilla Linnaeus 1758)
Abstrak: Development of artificial feed for somatic growth and gonad quality is one of the focus of research on sea urchin aquaculture activities. Palatability is important factor when developing artificial feed for aquaculture diets. This study investigated the effects of macroalgae (Sargassum polycystum, Gracilaria lichenoides, and Ulva reticulata) as feeding stimulants to artificial diets consumption and gonad profile for the adult sea urchin Tripneustes gratilla, by three feeding trials. Previously starved T. gratilla were held in replicated (3X) 50 L aquaria with recirculation water system (in the first feeding trial) and flow through water system (in the second and third feeding trial). In the first feeding trial, preference of T. gratilla for dried macroalgae was assessed in choice feeding experiment. T. gratilla displayed significant preference for the agar containing dried U. reticulata at 20% agar weight over nine other diets treatment when they were offered simultaneously. Total protein, energy and the ratio of protein to energy in the dried macroalgae had no correlation on agar consumption by T. gratilla. Three artificial diets were made by incorporating one of each of these dried macroalgae at 5% feed weight used in the second feeding trial. Although no significant difference in artificial diets containing dried macroalgae, urchins fed diets containing dried macroalgae consumed more than basal diet when they were offered as single diet. These results indicate that dried macroalgae added to the artificial diets act as feeding stimulants and increasing the acceptability of artificial sea urchin diets. The third feeding trial used dried U. reticulata as feeding stimulant to artificial diet. Data suggest that artificial diet containing 10% dried U. reticulata boosting feed consumption and significantly increasing nutrient accumulation, gonad index, egg diameter and fix gonad color.
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