The research theme is the concept of business According to Islamic economics. The purpose of research is to see the effect of service quality on customer satisfaction Islamic banks. The study was conducted in the city of Pekanbaru. Samples are as many as 200 customers. Research using multiple linear regression. The study found there is significant influence between service quality and satisfaction.

The theme of the article is "economy based on the principles of Islam". This study aims to determine how the zakat management model in Bima City. This study used descriptive qualitative method. The results of the research are: how to manage amil zakat there in accordance with Islamic principles, and is not in accordance with Islamic principles.

The theme of the article is "economy based on the principles of Islam". The agricultural sector is one of the main sources of income people in developing countries. The problems faced are reduction in the quantity of land resources and limited access to business services, especially in terms of capital. Muzara’ah is an alternative source of sharia-based financing, and has advantages in terms of capital repayment waivers. This study aimed to analyze the level of income muzara’ah results when compared to the level of household expenditure of Cimaranten farmer in the village, and analyzes the factors that influence the muzara’ah results. In addition, the commodities of this study are sweet potatoes and paddy. The method used is multiple linear regression analysis. The results showed that the average cultivated land area recently is 0.3 hectares. The land area has not been able to sufficient the household expenses of farmers, so the extent of wetland things that should be worked out to sufficient the expenditure of farm households is 0.56 hectares. Factors influencing the muzara’ah results is length of education, length of farming experience, the amount of working capital loans, and land area.

The research theme is the concept of business According to Islamic economics. This study aims: (1) Obtaining data about the quality of alumni. (2) Obtaining the absorption data of the world of work. (3) Obtaining data on public confidence in universities. (4) To know the effect of the quality of alumni on the absorption of the world of work and the communitys belief in higher education. The sample of research is as many as 201 people. The research results are: (1) There is a relationship between the quality of alumni with public trust. (2) There is an influence of alumnis quality on absorptive capacity of the world of work and public trust.

The research theme is the concept of business According to Islamic economics. The objectives of the research are: to see the influence of culture and family on the interest of saving customers. The research variables are: 1. Family, 2. Culture, and 3. Interest Saving. Hypothesis1: There is a significant influence between cultures (X1) with interest in saving (Y). 2. Hypothesis2: There is a significant influence between family (X2) with interest in saving (Y). The object of research is Islamic Bank in West Sumatra. The type of research is causality research with quantitative approach. The research population is all Islamic banking customers in West Sumatera. The sample of research is as many as 250 customers. The technique in sampling is non probability sampling method. Data analysis using multiple linear regression analysis. The results found that culture and family significantly affected the interest of saving Islamic bank customers.

The theme of the article is "economy based on the principles of Islam". The purpose of this research is to know about business ethics former trader of mobile phones in Sub Selong East Lombok. This research was conducted with a qualitative approach. Focus of this study was to determine the merchants business ethics on the sale and purchase of second hand phone in the District Selong East Lombok. Results of the study are: merchant opens on condition of used cell phones are sold, in taking high profits traders capitalize upon ignorance of the buyer, in getting a used cell phone from the merchant community push prices as low and sell at the highest possible price.

The theme of the article is "economy based on the principles of Islam". In the matter of ownership, individuals, society and the State as the subject of the economy have its own property rights, established by the sharia. The concept of ownership becomes very clear presented by Taqiyuddin an-Nabhani in his book Islamic economic system. In this book explained that Islam divides the concept of ownership becomes: individual ownership (private property); public ownership; and possession of the State (private state). Individual ownership is an individual right recognized by the sharia which such rights a person may have a wealth of moving or not moving. This right is protected and restricted by sharia law and no control. Moreover someone can finally have the authority to manage the assets held. Public ownership is all the wealth that has been set ownership by Allah to the Muslims so that the wealth of the Muslims belongs together. Individuals are allowed to take advantage of the wealth, but forbidden to have it personally. Islam recognizes the right of private property (individual) and allows businesses and individual initiative in using and managing personal wealth. Islam also has certain limitations in accordance shariah so that a person can use his private property without harming the public interest. However, there are some common interests that can not be managed and owned by individuals, but all of it belongs to and managed by the State for public interest.

This study aims to see the influence of the title of "hajj mabrur" to the motivation of hajj manasik. The study was conducted in the city of Padang, West Sumatra. This paper is a literature study. The study found that mabrur prediket strongly influence the motivation of manasik.