cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota yogyakarta,
Daerah istimewa yogyakarta
INDONESIA
Jurnal technoscientia
Published by Institut Sains dan Teknologi AKPRIND
ISSN : 19798415     EISSN : -     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Arjuna Subject : -
Articles 583 Documents
 39   40   41   42   43 
PENGARUH SUHU PROSES TERHADA P SINTESIS ALKYD RESIN DARI DAUN KEMANGI (OCIMUM BASILICUM) SEBAGAI BAKAL BINDER PEMBUATAN CAT Paparingan, Theodorus Cahyo; Pasaribu, Dony Syamsuddin Halomoan; Qoyyim, Fatah Ibnul; Purwanti, Ani
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 12 No 1 Agustus 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (295.098 KB) | DOI: 10.34151/technoscientia.v12i1.1825

Abstract

Alkyd resin are an example of a polymer product formed by the condensation polymerization process. Alkyd has great value when modified with natural oils or synthesis (triglycerides). This study aims to determine the effect of temperature on the mechanical properties of alkyd resin. The research process consists of 4 stages: the extraction process, the distillation process, the alcoholysis reaction and the esterification reaction. The study began by extracting essential oils from dried basil leaves. Extraction is done using n-hexane solvent which will be removed in the distillation process. The alcoholysis begins by reacting basil essential oil with glycerin in a volume ratio of 1:5 at 180oC. Then the esterification step is carried out by mixing phthalic anhydride into a batch reactor with a molar ratio of glycerol:phthalic anhydride 3:2. Then analyze aspects of viscosity, acid numbers, iodic numbers, and colors. The results obtained in the analysis showed a process temperature of 180oC more effectively used for further research processes because of the compatibility of the results with the alkyd resin reference value. The results obtained are 189516 cP viscosity, acid number 6,83935 mg/g, iodic number 1,8935 mg/g, and a dark yellow color.
KORELASI MINYAK-BATUAN INDUK UNTUK MENENTUKAN ASAL MINYAK DI CEKUNGAN JAWA TIMUR BAGIAN BARAT Wiloso, Danis Agoes
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 12 No 1 Agustus 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1255.119 KB) | DOI: 10.34151/technoscientia.v12i1.1843

Abstract

The research area is located in the western part of the East Java Basin which is still a question about the origin of oil in the research area. Data on two oil seepage (Kedung Jati and Galeh oil seepage) and source rock from Rembang-1 drilling wells were tested based on normal alkanes, sterane (m/z 217) and triterpane (m/z 191), then compared to oil seepage and source rock. Oil-rock correlation based on normal alkane distribution, triterpane appearance (m/z 191) and sterane (m/z 217) of two oil seepage and source rock extraction from the Rembang-1 well show a positive correlation about oil seepage and source rock from the Ngimbang Formation, so it is estimated that the seepage of Kedungjati and Galeh oil is produced from the Ngimbang Formation.
PETROGRAFI KARAKTERISTIK BATUPASIR FORMASI GAMPING WUNGKAL IMPLIKASI UNTUK PROVENAN, DIAGENESIS, DAN PROSES PENGENDAPAN, FORMASI GAMPING WUNGKAL, KECAMATAN BAYAT, KABUPATEN KLATEN, PROVINSI JAWA TENGAH Pangestu, Aaf Aji; Wiloso, Danis Agoes
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 12 No 1 Agustus 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1687.737 KB) | DOI: 10.34151/technoscientia.v12i1.1844

Abstract

Gamping Wungkal Formation, middle Eocene to Upper Eocene, which consists of sandstones, sandy marl, claystone and limestone which are the problems of provenance rock, diagenesis and its deposition process. Retrieval of stratigraphic data to determine the deposition process which is divided into several facies and determine its depositional environment, petrographic observations to determine the type of rock, provenance, tectonic settings. Interpretation of tectonic settings of sandstones Gamping Wungkal Formations on QFL diagram plots include recycled orogens, foreland uplift sub-zones while the plot in the QmFLt diagram of the provenance rock is the same as the QFL diagram, which is recycled orogen, sub-zone foreland uplift, rock model from recycled orogen foreland uplift sub-zone. The sandstone diagenesis of the Gamping Wungkal Formation in the study area is included in the mesodiagenesis stage where the compaction or burial process still dominates, the depositional environment in the study area is an area formed in the transitional environment or intertidal flat (Middle tidal flat) and subtidal (Lower tidal flat).
PENERAPAN FUNGSI PRODUKSI COBB-DOUGLAS GUNA MENGANALISIS PROSES TRANSFORMASI DALAM SISTEM PRODUKSI Sodikin, Imam; Sarsito, Bambang Mudo
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 9 Edisi Khusus Oktober 2004
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (314.374 KB) | DOI: 10.34151/technoscientia.v0i0.1881

Abstract

Simply production system can be described as a relation usher the input element, process and input. The element have to be supported with the feed back to control the system produce that to be able to improve the continuous repair. PT. Barata Indonesia in the early year 2003 was doing program to improve of output by performing variously repair of the task department. From the repair result will be was done by a measurement with to compare with the production process previous period. In this research, the method used is function produce of the Cobb-Douglas by using of software SPSS analysis. From data processing result, got an equation of linear regression which have transformed into function produce the following Cobb Douglas: For the year of 2002 equation is Q = 90,92.I10,75.I40,53 and for the year of 2003 Q = 79,04.I10,66.I40,39. Based of the result analyze by using the function produce the Cobb-Douglas have given is Return to scale ( RTS) with the value 1,28 for the year of 2002 and 1,05 for the year of 2003. Because value RTS > 1 so this matter is inferential that production process of two period known of the Increasing to Scale, meaning that proportion of factors of production, such as input will be increase the production the larger ones. While for the calculation of elasticity given the following value: Year 2002 raw material elasticity = 0,75%, meaning each every addition 1% raw material by use of constant machine man hours, product become will increase 0,75%, for the elasticity of use of machine man hours = 0,53% meaning each every accretion 1% machine man hours by use constant raw material, will increase the product addition become equal to 0,53%. Year 2003 raw material elasticity = 0,66%, meaning each every addition 1% raw material by use of constant machine man hours, product become will increase 0,66%, for the elasticity of use of machine man hours = 0,39% meaning each every accretion 1% machine man hours by use constant raw material, will increase the product addition become equal to 0,39%.
PENJADWALAN BATCH PADA SISTEM PRODUKSI JOB SHOP SINGLE ITEM MULTI Asih, Endang Widuri
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 9 Edisi Khusus Oktober 2004
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (291.533 KB) | DOI: 10.34151/technoscientia.v0i0.1884

Abstract

Peripatetic company in area manufacture will not get out of the that company ability to run its operation. Environmental problems optimation of manufacture usually hit the finite resource allocation of its amount in a few work area. With the certain criterion performance, the problems optimation is usually finished. One of form optimalitation in system manufacture is by scheduling existing production facility to finish some job. Two general criterion which often weared to evaluate the performance scheduling is makespan and flow time. At this research is conducted to compare the minimum makespan is by using overlapping method and without using overlapping method. Overlapping method is division of a number of part to be produced by multi stage into some batch in such a way that the batch can be parallelly processed. Batch scheduling by using overlapping method represent the optimal solution by minimation makespan. Total the optimal batch as much 2. Makespan got is equal to 148745,08 minute, smaller than makespan got without using overlapping method that is equal to 152000 minute. Big of time thrift is equal to 2,14%.
PENGARUH CAHAYA,TEMPERATUR DAN SHIFT KERJA TERHADAP KINERJA OPERATOR Simanjuntak, Risma Adelina; Christy, Nikolaus
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 9 Edisi Khusus Oktober 2004
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (271.355 KB) | DOI: 10.34151/technoscientia.v0i0.1885

Abstract

The result from operator worked was influenced by various existing system. This condition is not quit from the condition of physical environment work around operator and indirectly influence result of human being performance / the operator. This condition will be happened at one particular work which is needing high concentration and yield optimal performance time. Therefore this research purposes and objectives is to analyse the influence between light, work shift and temperature either through individual and or simultan. This research is done in soundproof space so the operator can yielding the optimal output. Pursuant to result of analysis with factorial experiment, ANOVA, 3 factor, test T, Test F which have known that having influence to operator performance is light, temperature, and work shift either through individual and or simultan with mistake storey level : 5 % shown with f value (count) > F( tables). Result of this research depict about yielded ability storey; level by human being in working which is resulted by the existence of third factor which is treatment was tested.the three condition which has been tested give conclusion that yielding optimal in working is light 170 Lux.,Temperatur 30-32 0 C, and shift work morning.
MENGHITUNG TINGKAT PRODUKTIVITAS TOTAL DALAM UPAYA MENINGKATKAN DAYA SAING PERUSAHAAN Parwati, Indri
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 9 Edisi Khusus Oktober 2004
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (277.657 KB) | DOI: 10.34151/technoscientia.v0i0.1886

Abstract

Tourism is a kind sector that can make increase of devisa and promotion to other country. A support factor for tourism to enjoy their facation is hotel’s industry. TRIM III Hotel need to do productivity calculating as base planning to increasing productivity in future. To calculating productivity in TRIM III Hotel using OMAX method, Marvin E. Mundhel, and Kendrick and D. Creamer. Based on calculating result by OMAX method gotten the higgest attainment indicator value at March 2005 equal to 737,71 % with increase to early period equal to 145,90 % and experiencing increase of productivity to previous period equal to 50,14 %, while the lowest attainment indicator at October 2004 equal to 227,05 % with decrease of productivity to previous period equal to 24,32 % and experiencing decrease of productivity to previous period equal to 55,57 %. By use Marvin E. Mundhel method the higgest productivity index’s value at April 2004 equal to 109,16 % with increase of productivity equal to 9,75% to previous period and the lowest productivity index value at October 2005 equal to 72,34 % with decrease of productivity equal to 13,14 % to previous period. Kendrick and D. Creamer method the higgest productivity index’s value at April 2004 equal to 154,88 % with increase of productivity equal to 18,35 % to previous period and the lowest productivity index’s value at October 2005 equal to 106,45 % with decrease of productivity equal to 22,81 to previous period.
PELAPISAN NIKEL PADA PELAT TEMBAGA DENGAN WAKTU 5, 10 DAN 15 MENIT DAN KOMPOSISI NIKEL KLORID 50 GRAM, 60 GRAM DAN 70 GRAM Waluyo, Joko; Huda, Saiful; wuryanto, Toto Sri
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 9 Edisi Khusus Oktober 2004
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v0i0.1888

Abstract

Electroplating is plating of metal on the metal or something has conductor charateristic by aiding direct current (DC) of electricity in the electrolyte solution function as metal ions solvent media, so it gives performance and smoothness that is interesting on the metal surface. The aim of this research is to know the plating result quality by using the difference chloride nickel composition. The are 50 gramn 60 gram and 70 gran of NiCL with plating duration 5 minutes, 10 minutes and 15 minutes, on the material with dimension 100 mmx70mm with thickness 3 mm. Plating process is done in the trapezium solution reservoir tank or called by Hull Cell. The result of this research is obtained that the best composition is 70 gran NiCl, with 15 A/dm2 current dense and with 15 minutes plating duration, the highest hardness value= 188.5 VHN and the lowest = 71.1 VHN, the highgest thicknees = 53.84 µm and the lowest = 3.07 µm, the best fltnees with value of Ra= 0.0573 µm, Rz = 0.400 µm and R max = 0.4500 µm and the worst flatness with the value of Ra = 0.4723 µm, Rz = 3.8250 µm and R max = 4.500 µm whereas the highest result glossy result = 72 % and the lowest = 33 %.
IMPLEMENTASI QUALITY FUNCTION DEPLOYMENT (QFD) UNTUK PENCEGAHAN KEGAGALAN PRODUKSI DRUM MINYAK PELUMAS di PT. X Waluyo, Joko; Purwanto, Adi; S, Achmad Taufiq
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 9 Edisi Khusus Oktober 2004
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (209.013 KB) | DOI: 10.34151/technoscientia.v0i0.1889

Abstract

Quality Function Deployment is a process to translate the costumer needs into gathering of product specification, the technique or the way to choose combination of product attributes in direction to maximize costumer satisfaction will be finish with a method or an idea. The relationship between needs and size (volume) that guarantee all of costumer needs has been measure are made into the matrix. This matrix is the keywords that used on the house of quality. This research focused on Quality Function Deployment to search the failure cause that happened as the compentation between procees of production. Grouping failure choose the one that caused the biggest failure based on the research and then we try to solve the problem. The result of QFD and HOQ describes that priority based on the highest raw weight is the” price attribute” with nominal result 7.06, besides that the attribute of “importance to costumer” are on the deliver/dispatch precisely with nominal result 3.00. The highest “costumer satisfaction” attribute is on the paint guarantee with the nominal result 2.91. The company highest priority to realize is the paint guarantee with the sales point nominal 1.5, raw weight nominal 5.65, improvement ratio nominal 1.37, and costumer satisfaction nominal 2.91 with the goal nominal 4. On the second diagram, componen deployment matrix with the highest “design implementation weight” are sorting the type of paint with nominal 880,08 and relative weight nominal 21,81%.
HUBUNGAN ANTARA NOMOR FERIT DENGAN LAJU KOROSI PADA BAJA TAHAN KARAT AUSTENITIK DALAM KONDISI AS CAST DAN AS WELD Huda, Saiful
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 9 Edisi Khusus Oktober 2004
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (431.768 KB) | DOI: 10.34151/technoscientia.v0i0.1890

Abstract

Austenitic stainless steel has superior characteristic in corrosion resistance, but it tends to crack when welded. To prevent the crack during the welding, Cr equivalent can be increased to produce fasa ferit in austenitic metric. Austenitic stainless steel containing minimum 4% of ferit will avoid weld cracking; however, it will decrease the corrosion resistance. The aim of this research is to know the corrosion rate of austenitic stainless steel with different ferit content in the as cast and as weld conditions. The different content of ferit is obtained in two ways. First, in as cast condition it is obtained by choosing 3 different materials with different chemical compound. Cr equivalent and Ni equivalent are calculated so that by using Schaeffer diagram the ferit content in the main metal ( austenitic steel) can be identified that is ferit number 7, 9, and 10.The second way is obtained through the welding process using different electrode for different main metal. By taking 20% of the delusion, austenitic stainless steel containing ferit number 6,8,and 9 is obtained. Corrosion rate, tensile strength, and impact tests are done on these six materials. The findings show that in the same ferit number, as weld stainless steel is more corrosive and the impact strength is much lower than that of as cast. Meanwhile, in the same material(as weld as well as as cast) the bigger the ferit number the more the corrosion and the lower the tensile strength and the impact are.

Page 41 of 59 | Total Record : 583

 39   40   41   42   43 

Filter by Year

2004 2024


Reset
Filter By Issues
All Issue Technoscientia Vol 17 No 1 September 2024 Technoscientia Vol 16 No 2 Maret 2024 Technoscientia Vol 16 No 1 September 2023 Technoscientia Vol 15 No 2 Maret 2023 Technoscientia Vol 15 No 1 September 2022 Technoscientia Vol 14 No 2 Maret 2022 Technoscientia Vol 14 No 1 Agustus 2021 Technoscientia Vol 13 No 2 Februari 2021 Technoscientia Vol 13 No 1 Agustus 2020 Technoscientia-Vol 13 No 1-Agustus 2020 Technoscientia Vol 12 No 2 Februari 2020 Technoscientia Vol 12 No 1 Agustus 2019 Technoscientia Vol 11 No 2 Februari 2019 Vol 10, No 2 (2018): Vol 10 No 2 Februari 2018 Vol 11, No 1 (2018): Technoscientia Vol 11 No 1 Agustus 2018 Technoscientia Vol 10 No 2 Februari 2018 Vol 10, No 1 (2017): Vol 10 No 1 Agustus 017 Vol 9, No 2 (2017): Vol 9 No 2 Februari 2017 Technoscientia Vol 10 No 1 Agustus 2017 Technoscientia Vol 9 No 2 Februari 2017 Technoscientia Vol 9 No 1 Agustus 2016 Technoscientia Vol 8 No 2 Februari 2016 Technoscientia Vol 8 No 1 Agustus 2015 Technoscientia Vol 7 No 2 Februari 2015 Technoscientia Vol 7 No 1 Agustus 2014 Technoscientia Vol 6 No 2 Februari 2014 Technoscientia Vol 6 No 1 Agustus 2013 Technoscientia Vol 5 No 2 Februari 2013 Technoscientia Vol 5 No 1 Agustus 2012 Technoscientia Vol 4 No 2 Februari 2012 Technoscientia Vol 4 No 1 Agustus 2011 Technoscientia Vol 3 No 2 Februari 2011 Technoscientia Vol 3 No 1 Agustus 2010 Technoscientia Vol 2 No 2 Februari 2010 Technoscientia Vol 2 No 1 Agustus 2009 Technoscentia Vol 1 No 2 Februari 2009 Academia Ista Vol 12 No 02 Februari 2008 Technoscentia Vol 1 No 1 Agustus 2008 Academia Ista Vol 12 No 01 Agustus 2007 Academia Ista Vol 11 Edisi Khusus Oktober 2006 Academia Ista Vol 10 Edisi Khusus September 2005 Academia Ista Vol 9 Edisi Khusus Oktober 2004 More Issue