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STUDI TENTANG PENENTUAN WAKTU, ONGKOS DAN EFISIENSI PEMESINAN SERTA KORELASINYA DENGAN KUALITAS PRODUK PADA PROSES TURNING DENGAN MESIN BUBUT CNC TU-2A Dwi Basuki Wibowo; - Sugiyanto
TRAKSI Vol 2, No 1 (2004): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Penelitian ini membahas pengaruh kedalaman pemotongan terhadap angka kekasaran permukaan, ongkos pemesinan terhadap efisiensi pemesinan serta waktu pemotongan total terhadap ongkos pemesinandengan mesin CNC bubw TU-2A. Tujuan penelitian ini adalah menentukan korelasi antar variable pengujian tersebut sehingga dapat diketahui kombinasi putaran spindle kecepatan pemakanan dan kedalaman pemotongan yang ideal dimana produk yang dihasilkan masih relatif halus dan ongkos pemesinannya relatif rendah. Hasil penelitian menunjukan semakin besar kedalaman potong (sampai a : I mm) serta semakin rendah rpm spindle (hingga n = 700 rpm), kekasaran permukaan makin besar. Sementara itu efisiensi pemesinan berkorelasi positif terhadap ongkos pemesinan, padahal efisiensi pemesinan berhubungan langsung (linier) dengan waktu pemesinan. Waktu pemesinan yang rendah bias dicapai dengan menset kedalaman pemotongan tinggi (a = I mrn), putaran spindle tinggi (;= 1200) dankecepatan pemakanan rendah (F = 60 mm/menit), yang bias digunakan untuk proses pengkasaran Sementara untuk proses penghalusan/finishing dianjurkan menggunakan putaran spindle tinggi n : lZ00 rpm, kedalaman pemotongannya rendah a = A,2 mm dan kecepatan pemakanannya rendah F : 60 mm/menit.Kata Kunci I Bubut, CNC, Kekasaran, Korelasi, Ongkos

PERHITUNGAN FAKTOR KONSENTRASI TEGANGAN PADA PIPA KONSTRUKSI PERCABANGAN 60o AKIBAT GAYA AKSIAL MENGGUNAKAN METODE ELEMEN HINGGA Dwi Basuki Wibowo; - Sugiyanto; Agus Suprihanto
TRAKSI Vol 5, No 1 (2007): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Dewasa ini pipa banyak digunakan untuk elemen struktur misalnya untuk rangka bangunan, konstruksi reklame, tiang listrik dan telepon dll. Seperti halnya dalam sistem perpipaan, penggunaan pipa untuk struktur tidak dapat menghindari adanya percabangan. Hal ini akan menyebabkan konsentrasi tegangan disekitar percabangan tersebut ketika struktur tersebut dikenai pembebanan. Dalam tahapan disain, untuk memperkirakan besarnya tegangan maksimum yang terjadi lazimnya diperlukan faktor konsentrasi tegangan (Kt). Besarnya Kt ini dipengaruhi oleh dimensi dan geometri elemen serta modus pembebanannya. Penelitian ini ditujukan untuk mencari besarnya Kt untuk percabangan pipa 90o yang dikenai beban aksial untuk berbagai rasio perbandingan diameter pipa utama dan cabang dengan metode elemen hingga. Tahapan penelitian berturut-turut adalah geometric modelling, finite element modelling, eksekusi model, analisis distribusi tegangan dan perhitungan Kt. Representasi hasilnya adalah berupa grafik Kt versus d/D dimana d adalah diameter cabang dan D adalah diameter utama. Hasil penelitian menunjukkan bahwa harga besarnya harga Kt sangat tergantung dari disain pipa konstruksi yang dibuat. Kata Kunci : Percabangan Pipa, Faktor Konsentrasi Tegangan, Metode Elemen Hingga.

PENGARUH GAYA BELAJAR EXPERIENTIAL LEARNING DALAM PENINGKATAN PRESTASI AKADEMIK DAN PENERAPANNYA DALAM PEMBELAJARAN - Sugiyanto
Paradigma No. 15 Vol VIII, Januari 2013
Publisher : Paradigma

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Abstract. Teachers in the learning process, should pay attention to the characteristics of their students. A wide range of student characteristics, both internally and externally. One of the characteristics of students in learning that need to be considered in teacher learning and affect the effectiveness of teaching and learning is the learning styles of the students.Experiential Learning not only provide insight into the concepts of knowledge alone. However, it also gives a real experience that will build skills through real assignments. Experienced learning theory is formed through a process of suppression. Suppression process includes concrete experience, observe /reflect on concrete experiences, abstract concepts and generalizations formatting, to test implications of concepts in new situations. The four processes form the four types of learning styles are: konverger, akomodator, diverger, and assimilator.Teachers in teaching has its own learning style as well as the types of students have learning styles but it does not mean the quality of teaching by itself will increase. Learning style is closely related to an individual's personal history influenced by education and development. This is because the factors that affect academic achievement itself. Therefore, in the learning process teachers need to pay attention to the types of learning styles of the students as well as teachers also have their own learning style.

Sarana Navigasi Kognitif Sebagai Upaya Peningkatan Legibilitas Pada Bangunan Mal/Fasilitas-Umum Magda Bhinnety Etsem; Bimo Walgito; - Sugiyanto; - Priyosulistyo
Jurnal Psikologi Vol 34, No 2 (2007)
Publisher : Faculty of Psychology, Universitas Gadjah Mada

Interaction between human and techno-logy sometime is not yet optimum due to the fact that psychological aspect has not been thoroughly considered. Mall is a kind of very attractive public facilities that resemble product of technology. High degree of legibi-lity is needed for optimal use of the mall. The present research is conducted to study: (a) spatial cognition performance of human when short reaction time is demanded, and (b) utilization of such performance with You Are Here (YAH) map as cognitive navigation tool for better legibility. The research method consist of 3 stages: (a) status survey to 20 malls at several big cities in Java, (b) preliminary experiment at a new building with its setting satisfies mall characteristics, and (c) experimental research conducted at a new mall building, involving 160 subjects. Subjects were assigned to do wayfinding tasks, which include: finding a room at the same and different floors. Prior to wayfinding, subjects were asked to look at a YAH map that has been manipulated in terms of the type (North Up Orientation/ NUO or inline egodirection), and its place¬ment rotation (R0, R45, R90, R135, R180, R225, R270, R315). Subjects were assigned to make scats map for assessing their cognitive map representation ability. The following conclusions could be drawn: (a) there is a difference in wayfinding reaction time between YAH map that follow NUO and that of inline; wayfinding reaction time of inline map is lower than that of NUO; (b) there is a difference in wayfinding reaction time among various rotation of YAH map that follow NUO; up to rotation of 1800, the more the rotation the longer the reaction time will be; (c) there is no diffe¬ren¬ce in wayfinding reaction time among various rotation that follow inline principle; (d) there is a difference in the number of direc¬tion mistake during wayfinding bet¬ween YAH map that follow NUO and that of inline; the number of mistake of inline map is lower than that of NUO map; (e) there is a combination of YAH map type and the way it is placed (rotation) that results in relative¬ly shorter wayfinding reaction time, i.e.: those that affecting mental rotation equal to zero; (f) in general all subject possess high cognitive map representation ability that could be utilized in cognitive navigation during wayfinding. Keywords: wayfinding, mental rotation, You Are Here map, cognitive navi-gation

Efektivitas Permainan Konstruktif-Aktif untuk Meningkatkan Kemampuan Membaca Siswa Kelas 2 Sekolah Dasar Pradytia P Pertiwi; - Sugiyanto
Jurnal Psikologi Vol 34, No 2 (2007)
Publisher : Faculty of Psychology, Universitas Gadjah Mada

The purpose of this study was to measure the effectiveness of active-construc-tive play to increase second grade elementary students’ reading ability. The posttest only design with non equivalent controlled group was used as the experimental design of this research. Thirty subjects, seven year-old second grade elementary students was assign to experi¬mental group (15 subjects) and control group (15 subjects) without ran¬domi-zation. Five kinds of active-constructive play were used to raise cognitive components of reading. Data was analyzed using Ana¬lysis of Covariance (ANCOVA) with intelli¬gence as covariable. The result indicated no difference between control group and experi¬mental group in reading ability (F = 3, 271 ; p = 0,082). According to the test result, active-constructive play wasn’t effective to increase second grade elementary students’ reading ability. Keywords: active-constructive play, reading ability.

Sarana Navigasi Kognitif Sebagai Upaya Peningkatan Kemudahan Evakuasi Pada Bangunan Mal/Fasilitas-Umum Magda Bhinnety Etsem; Bimo Walgito; - Sugiyanto; - Priyosulistyo
Jurnal Psikologi Vol 35, No 1 (2008)
Publisher : Faculty of Psychology, Universitas Gadjah Mada

Mall is a kind of very attractive public facilities that resemble product of technology. In addition to the need of high legibility for optimal use, visitor evacuation with relatively shorter reaction time is desired during emergency situation. The present research is conducted to study: (a) spatial cognition performance of human when short reaction time is demanded, and (b) utilization of such performance with You Are Here (YAH) map as cognitive navi¬gation tool for better emergency responds. The research method contains an expe-rimental work conducted at a real new mall building, involving 160 subjects and 18 experimenters. In this experiment, subjects were assigned to do wayfinding tasks, which covers finding way out through emergency stairs and exit. Prior to wayfinding, subjects were asked to look at a YAH map that has been manipulated in terms of the type (North Up Orientation/NUO or inline egodirec¬tion), and its placement rotation (R0, R45, R90, R135, R180, R225, R270, R315). Subjects were assigned to rank degree of clarity of 3 leaflets containing information of emergency responds at public building, to make scats map for assessing their cognitive map representation ability, and to answer questions related to the information covered in the leaflet. The following conclusions could be drawn: (a) there is a difference in wayfinding (finding way out through emergency stairs and exit) reaction time between YAH map that follow NUO and that of inline egodi¬rection; wayfinding reaction time of inline egodirection map is lower than that of NUO map; (b) there is a difference in the number of direction mistake during wayfinding between YAH map that follow NUO and that of inline egodirection; the number of direction mistake of inline egodirection map is lower than that of NUO map; (c) there is a combination of YAH map type and the way it is placed that results in relatively shorter wayfinding reaction time, i.e.: those that affecting mental rotation equal to zero; (d) there is a kind of leaflet that could be correctly perceived within a relatively short time; (e) in general all subject possess high cognitive map representation ability that could be utilized in cognitive navigation during emergency. Keywords: wayfinding, mental rotation, You Are Here map, cognitive navi-gation, emergency

Pengaruh Iklim Keselamatan dan Pengalaman Personal terhadap Kepatuhan pada Peraturan Keselamatan Pekerja konstruksi - Prihatiningsih; - Sugiyanto
Jurnal Psikologi Vol 37, No 1 (2010)
Publisher : Faculty of Psychology, Universitas Gadjah Mada

This study was conducted to examine the effect of safety climate and personal experience on safety compliance, particularly in the use of personal protective equipment (PPE), of construction workers. Safety climate and compliance questionnaire was used to measure the level of safety climate and compliance. Personal experience variable consist of work experience and educational experience that was analyzed independently as two variables. The subject of this study (N=70) are construction workers in the rehabilitation project of Amongrogo, in Yogyakarta. Multiple regressions is used for data analyzing. The result indicate the significant effect of both safety climate and personal experience toward safety compliance, particularly in the use of PPE (R 2= .253; p<.05). The coefficient of determination is .253 indicating that both safety climate and personal experience result together 25.3% effective contribution for safety compliance. Safety climate itself results 7.8%, while personal experience results 17.5% effective contribution for safety compliance. There are only three dimensions of safety climate, from sixth dimensions being examined, that have significant effect to safety compliance, which are supervisor safety practices, safety attitude, and safety training dimension. Supervisor safety practices have dominant effect, and result 39.8% effective contribution on safety compliance.

Pengaruh Dukungan Sosial dan Kepemimpinan Transformasional Terhadap Komitmen Organisasi dengan Mediator Motivasi Kerja Miftahun Ni’mah Suseno; - Sugiyanto
Jurnal Psikologi Vol 37, No 1 (2010)
Publisher : Faculty of Psychology, Universitas Gadjah Mada

The purpose of this research was to investigate the influence of social support and transformational leadership toward the three component model of organizational commitment (affective, continuance, and normative) with work motivation as a mediator. Subjects were 94 employees of a sugar factory in Indonesia with minimum 2 years as tenure. Four questionnaire used to obtain the data were organizational commitment questionnaire, social support questionnaire, transformational leadership questionnaire, and work motivation questionnaire. Data were analyzed using regression analysis and partial correlation. Results were: (1) affective and continuance commitments were significantly influenced by social support and transformational leadership with work motivation as mediator and (2) normative commitment was not significantly influenced by social support and transformational leadership. Keywords: organizational commitment, social support, transformational leadership, work motivation.

Komitmen Sebagai Mediator Pengaruh Iklim Inovatif dan Kecocokan Individu‐Tim Terhadap Kinerja - Sugiyanto
Jurnal Psikologi Vol 36, No 1 (2009)
Publisher : Faculty of Psychology, Universitas Gadjah Mada

In the long term, the purpose of the research is to build an understanding of the organizational commitment as an important mediator of the effects of various antecedents on performance. The commitment as a mediator has been studied in various levels of workplace: Low, medium, and high technologies. The current study tested a theoretical model of the components of organizational commitment as mediators, innovative climate and person‐team fit as antecedents, whereas its consequence was performance. The components of organizational commitment were affective, continuance, and normative. All of the measures applied a 5‐point scale response ranging from 1 (not very important at all or strongly disagree) to 5 (very important or strongly agree). Respondents were 203 university students. Data was analyzed using hierarchical multiple regression analyses.Results showed that the three components of organizational commitment were not significant mediator of the effects of innovative climate and person‐team fit on performance. Theoretical and methodological rinterpretations were discussed regarding the next designs of study.

VALIDITAS TES SPM SEBAGAI ALAT PENGUKUR KECERDASAN PELAJAR-PELAJAR SMA - Masrun; Johana E. Prawitasari; - Sugiyanto; Anastasia Suwarsiyah; Toto Kuwato
Jurnal Psikologi Vol 4, No 1 (1976)
Publisher : Faculty of Psychology, Universitas Gadjah Mada

Psikologi adalah ilmu pengetahuan yang usianya masih sangat muda. Ilmuini baru dianggap sebagai ilmu yang berdiri sendiri setelah salah seorangahlinya yang bernama Wundt mendirikan laboratorium psikologi di UniversitasLeipzig pada tahun 1879 serta memasukkan psikologi sebagai mata kuliah yangberdiri sendiri di universitas tersebut. Namun demikian sejak permulaan abad dua puluh, terutama setelah terjadi perang dunia pertama, maka psikologi telah mengalami perkembangan yang sangat pesat dan mencakup ruang lingkup yang sangat luas, sehingga pada masa ini telah dirasakan peranannya dalam banyak bidang.

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