Sebelas Maret University

About: Sebelas Maret University is a education organization based out in Surakarta, Indonesia. It is known for research contribution in the topics: Population & Public health. The organization has 10901 authors who have published 10832 publications receiving 33057 citations. The organization is also known as: Universitas Negeri Surakarta & Universitas Sebelas Maret.

Impact of blockage ratio on thermal performance of delta-winglet vortex generators

Abstract: The impact of double-sided delta-winglet tape (DWTs) inserts on convective heat transfer and friction behaviors in a tube was experimentally investigated. Three DWTs with ratios of winglet-height (b) to inner tube diameter (di) called blockage ratio (Rb) of 0.28, 0.35 and 0.42 were tested and their performance was compared to that of a longitudinal strip and plain tube under similar test flow conditions. Experiments were conducted over a wide range of flow rates, 3.35 × 10−5–8.33 × 10−5 m3/s, which correspond to 5500 ≤ Reynolds number (Re) ≤ 14,500 in the 14.3 mm i.d. tube. The results revealed that using DWTs dramatically increased the Nusselt number (Nu) by as much as 364.3% and the friction factor (f) by 15.5 times compared with those of a plain tube. Thermal performance (η) increased with a corresponding increase in Rb. The highest thermal performance (η) obtained was 1.4. Showing a notable improvement on the thermal performance of the system, DWTs are proposed as a favorable insert device.

Inventory decisions in a two-echelon system with remanufacturing, carbon emission, and energy effects

Abstract: In this study, we propose an inventory model consisting of a depot and a distributor with environmental and finite remanufacturing generations considerations. Investigation of the environmental effects is done by examining how carbon emissions and energy consumption for both transportation and production affect the model’s optimal solution. In the system, the depot fulfils demand at the distributor through ordering new products from outside supplier and remanufacturing used items that are returned from the market. We build the joint annual inventory cost function and find its minimum value by determining the optimal value of shipment lot size, number of shipments per year, and the number of remanufacturing generations. The results show that the proposed model gives benefit to the depot and the distributor, respectively. Optimizing the inventory related costs and the environmental costs actually provides less remanufacturing generations. In the other hand, higher amount of solid waste disposal and ...

The Persuasive Utterances in a Political Discourse (The Case Study of the Regent Election Campaign of Pasuruan, East Java-Indonesia)

Abstract: This article describes the result of the research study of persuasive utterances used by the campaign speakers of the Regent and vice Regent election at Pasuruan, East Java. The specific aim of the study is to describe the patterns, strategies and culture-social norms of persuasive utterances used in the political campaign based on the pragmatic perspective. Theoretically, persuasive utterances are defined as the ones to influence and convince the hearers to do the acts wanted by the speakers. Therefore, the utterance types can be categorized into 'directive-speech acts'. Having been pragmatically studied, however, the persuasive utterances which have been functioned as 'directive-speech acts', are not merely used in 'directives' but also in other speech-acts such as: assertive/representatives, commissives, expressives, and declaration. That's why, they can be classified into 'directives' in the form of direct utterances and 'directives' in the form of indirect utterances. Then, in this study direct utterances are categorized into 'directives' while indirect utterances are categorized into combination forms such as: assertive-directives, commissive-directives, expressive-directives, and declaration-directives. Besides reflecting the patterns, these speech-acts also reflected the strategies of utterances in which the norms of culture and social life of the local people can be described. These norms can be identified based on the utterance forms and strategies that the speakers used and also the attitudes or social behaviors that they showed, such as: politeness, the harmony of the team work, and their obedience to kiai or ulama (Moslem scholars) in determining their political wisdom. Thus, the persuasive utterances and persuasive acts produced by the speakers can be said to have an impact to the norms of positive and negative politeness of speakers and hearers.Keywords: Pragmatic study, Persuasive utterances, Directive speech-acts, Strategies of utterances, Political campaign, Norms of social life1. IntroductionThe back ground of the study is based on the impoliteness of political campaign events held by the political parties by the time of the General Election of the House of Representatives and the Head of Government (President, Governor, Regent and Mayor). The problems above were mostly seen from the deviation of campaign regulations or campaign ethics, such as distributing the media of campaign (the pictures of candidates) broadly before the time of campaign came.Referring to the background of the study, this research is categorized as "qualitative' in the form of "ethnography'. Related to the research design mentioned above, then the aims of the study are focused on the descriptions of the utterance patterns, strategies, and norms of culture and social life which were produced by each utterance such as: the politeness of utterances, the politeness of persuasive acts, and political culture behaved by the persuaders.To achieve the goal of the study, then the researcher analyzed 151 utterances of the total number of 460 utterances which were available in a data corpus. Those utterances were analyzed using techniques and approaches of the following dimensions: (1) dimension of pragmatic theories, (2) dimension of persuasion theories, and (3) dimension of social and culture theories.1.1 Dimension of Pragmatic Theories.Theoretically, this study cannot be separated from pragmatic theories argued by the linguists, such as Austin, the Britain linguist (1962) who argued the earliest speech-act theory. This theory was adopted from Malinowski's views (1923) which show that each utterance made by a speaker is an act. In this case, Malinowski argued that language was not only used as a means of saying the words but also doing the acts. Even, in a phatic communication, what a speaker says also produces an act. The other linguists who developed Malinowski's theory are Jacobson (1960), Searle (1969), and Kreidler (1998). …

Perilaku konsumtif remaja penikmat warung kopi

Abstract: This research is a descriptive qualitative research types that focus on the fieldresearch and did not rule out library study that aims to describe the adolescent consumptive behavior of coffee connoisseurs in district of Plaosan, Magetan. The sampling techniques used in this research ware purposive sampling and snowball sampling. Samples taken in this study was the adolescent in Plaosan who were glad to consume coffee. Data collection method used were in-depth interviews, observation and documentation. Analysis of the data used was interactive analysis that includes data collection, data reduction, the presentation of data, and the withdrawal of the conclusion. The results of this study indicate that the characteristics that stand out on a coffee connoisseur adolescent seen from lifestyle and his social life was spent much of his time with his friends. Factors that influence adolescents to consume coffee because of the motivation of the individual, the individual economies, teammates and family. Motivation in adolescents coffee connoisseur is to fulfill his wishes, supported by the economic support and teammates who made the coffee connoisseur adolescents more comfortable in doing the activities of consumption. Consumptive behavior was done by adolescent coffee connoisseur is to choose the site, the types of drinks to their favorites, choosing snacks as a friend drinking coffee, selecting friend invitation, a time that fits their expectations, how to enjoy drinks, chatting, smoking, the atmosphere when consuming coffee and putting aside allowance. Keywords: adolescent, consumerist, coffee

Integrating Game-based Interactive Media as Instructional Media: Students’ Response

Abstract: Instructional media functioning to deliver the lesson has a very important role. There are a lot of instructional media used in learning process; one of those is interactive multimedia. This study aims to find out students response toward game based interactive media as instructional media in elementary school. The method used in this study was descriptive qualitative. The sample in this study was 10 students 5 th grade elementary school. The data collecting methods were interview, observation and questionnaire. The collected data were analyzed by using interactive analysis consist of data collecting, data reduction, data presenting and conclusion. The result of this study shows that the student gave a good response toward game-based interactive multimedia. The students like and support the use of game based interactive multimedia as instructional media. Students felt that it was easier to understand lesson because the lesson was delivered not only through text, but also picture, audio, video and animation. The game in interactive media make the student be entertained and active in learning process. It is suggested that the teacher cooperate with the expert in education technology to improve interactive multimedia as interaction media.