Judul: Effect of Working Capital Management on  Profitability of Micro and Small Processed Food Businesses in Indonesia
Abstrak: Usaha mikro dan kecil terus tumbuh di Indonesia dengan memegang peranan yang penting terhadap penyerapan tenaga kerja, pemerataan pendapatan, kegiatan ekspor, dan investasi. Usaha pangan olahan memberikan cakupan yang luas untuk berbagai jenis usaha mikro dan kecil berkembang di dalamnya dengan jumlah yang cukup besar. Penelitian ini bertujuan untuk menganalisis faktor-faktor manajemen modal kerja yang memengaruhi profitabilitas usaha mikro dan kecil pangan olahan di Indonesia. Penelitian menggunakan data sekunder bersumber dari survei industri mikro dan kecil tahun 2015. Jumlah sampel usaha mikro dan kecil yang diteliti sebanyak 1.804 usaha yaitu 1.563 usaha mikro dan 241 usaha kecil pangan olahan. Metode analisis yang digunakan yaitu regresi linear berganda dengan pendekatan Ordinary Least Square (OLS). Variabel dependen yaitu Return On Asset (ROA) yang menggambarkan profitabilitas. Variabel independen yaitu variabel manajemen modal kerja yaitu Payables Defferral Period (PDP) dan Inventory Conversion Period (ICP); karakteristik usaha yaitu Umur Usaha, Current Ratio (CR), Debt to Asset Ratio (DAR), dan Skala Usaha; serta karakteristik pelaku usaha yaitu Umur Pelaku Usaha dan Tingkat Pendidikan Pelaku Usaha. Hasil penelitian menunjukkan PDP dan skala usaha berpengaruh negatif signifikan, dan DAR berpengaruh positif signifikan terhadap profitabilitas usaha mikro dan kecil pangan olahan di Indonesia., Micro and small businesses continue to grow in Indonesia by playing an important role in employment, income distribution, export activities, and investment. Processed food businesses provide a broad scope for various types of micro and small businesses to develop in quite large numbers. This study aims to analyze the factors of working capital management that affect the profitability of micro and small processed food businesses in Indonesia. The study uses secondary data sourced from a survey of micro and small industries in 2015. The number of samples of micro and small businesses studied was 1,804 businesses, namely 1,563 micro businesses and 241 small processed food businesses. The analytical method used is multiple linear regression with the Ordinary Least Square (OLS) approach. The dependent variable is Return On Assets (ROA) which describes profitability. The independent variables are working capital management variables, namely Payables Defferral Period (PDP) and Inventory Conversion Period (ICP); business characteristics, namely Business Age, Current Ratio (CR), Debt to Asset Ratio (DAR), and Business Scale; as well as the characteristics of business actors, namely the Age of Business Actors and Education Level of Business Actors. The results showed that PDP had a significant negative effect, the business scale had a significant negative effect, and DAR had a significant positive effect on the profitability of micro and small processed businesses in Indonesia
Keyword: operating assets, payable period, inventory turnover

Judul: Effect analysis of initial capital against micro enterprise’s turnover at dramaga, bogor
Abstrak: Usaha Mikro Kecil dan Menengah (UMKM) di Indonesia berjumlah 56 534 592 unit pada tahun 2012 dan sebanyak 55 856 176 merupakan usaha mikro. Usaha mikro banyak diminati karena memerlukan modal yang relatif kecil. Salah satu usaha mikro adalah usaha makanan dan non makanan di Dramaga. Penelitian ini menganalisis karakteristik sosial ekonomi pengusaha mikro serta pengaruh kuantitas dan sumber modal terhadap omset usaha. Data yang digunakan adalah data primer dari hasil wawancara dengan panduan kuesioner kepada 30 responden. Hasil analisis regresi linier berganda menunjukkan bahwa variabel pendidikan, status pernikahan, komoditas usaha, jumlah modal awal, lama usaha, sumber modal awal, dan total biaya berpengaruh terhadap omset usaha dengan taraf nyata 20%. Komoditas usaha, jumlah modal awal, lama usaha, dan total biaya berpengaruh positif. Jenjang pendidikan, status pernikahan, dan sumber modal awal berpengaruh negatif. Pengusaha yang belum menikah, pengusaha makanan, dan pengusaha dengan modal pinjaman memiliki omset relatif lebih besar dibanding pengusaha yang sudah menikah, pengusaha non makanan dan pengusaha dengan modal sendiri., Micro, Small and Medium Enterprises (SMEs) in Indonesia amounted to 56,534,592 units in 2012 and 55,856,176 of these are micro enterprises. Micro enterprises in great demand because it requires a relatively small capital. One of micro business is the business of food and non-food in Dramaga. This study analyzed the socio-economic characteristics as well as the influence of the quantity of micro entrepreneurs and capital resources of the business turnover. The data used is primary data from interviews with 30 respondents using questionnaire guide. The results of multiple linear regression analysis showed that the variables of education, marital status, commodity business, the amount of initial capital, the old business, initial capital sources, and total business turnover costs affect the real level of 20%. Commodity business, the amount of initial capital, the old business, and the total cost have a positive effect. Level of education, marital status, and source of initial capital have a negative effect. Employers who are not married, businessman food, and entrepreneurs with capital loans have a relatively larger turnover than the businessman who is married, non-food entrepreneur and businessman with his own capital.
Keyword: Dramaga, Modal, Omset, Usaha Mikro

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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