scholarly journals Rancang Bangun Sistem Presensi Menggunakan Sidik Jari (Studi Kasus Pada Lembaga Pemasyarakatan Klas II-A Palu)

Author(s):  
Amriana Amriana ◽  
Andi Hendra ◽  
Arfiah Bakhtiar

Dermatoglyphic has been widely applied to recognize a person's identity, because people basically have something unique or characteristic possessed only by themselves. This raises the idea of making it a unique identity. This is useful for employees presence applications, especially at Lembaga Pemasyarakatan Klas IIA Palu which is still doing manual presence. This system provides the division of labor time and wereable to detect the fingerprints of employees using a fingerprint scanner. The system was made in several stages of the input fingerprint image, binarization fingerprint image, fingerprint image quality improvement, and matching fingerprint image. Improvements to the quality of the fingerprint image consists of the surgical process of mathematical morphology opening and erosion. The detection process of the fingerprint image used euclidean distance measurement points minutiae. The test results indicate that the presence system accuracy using euclidean distance measurement could detect the fingerprint image by 89% from 20 fingerprint data with 5 times testing for each data.

Author(s):  
C. Senfuka ◽  
J. B. Kirabira ◽  
J. K. Byaruhanga

All steel made in Uganda is currently manufactured from scrap. Such steel has often been characterized by unpredictable performance in consonance with its inconsistent raw material inputs. This study evaluates and relates the mechanical, metallurgical and geometrical properties of these bars in order to identify the factors underlying the performance of the products from this steel and examine the relationship with their scrap content. In order to study the steels, tensile, torsion and micrographic tests have been carried out together with spark emission spectrometry on samples collected from different plants. The test results generally indicate impressive steel resilience, strength and metallographic properties in spite of relatively high and irregular carbon content. Limited weldability, uniaxiality of properties, uneven scatter of microelements and substantial non-uniformity of longitudinal mechanical properties have been observed. Rolling and post rolling defects have been noted. The geometric reliability of the bars has also been found generally low. Improvement of secondary refinement, use of direct reduced iron (DRI) diluent and more diligent sorting have suggested as solutions.


2016 ◽  
Vol 37 (4) ◽  
pp. 3-18
Author(s):  
Tadeusz Bohdal ◽  
Henryk Charun ◽  
Małgorzata Sikora

AbstractAnalysis of the state of-the-art in research of refrigerant condensation in miniature heat exchangers, so-called multiports, was made. Results of refrigerant R407C condensation in a mini condenser made in the form of two bundles of tubular minichannels from stainless steel with an inside diameter 0.64 mm and length 100 mm have been presented. Two exchangers consisted of four minichannels and 8 minichannels have been investigated. The values of average heat transfer coefficient and frictional pressure drops throughout the condensation process were designated. The impact of the vapor quality of refrigerant and the mass flux density on the intensity of heat transfer and flow resistance were illustrated. A comparative analysis of test results for various refrigerants in both mini heat exchangers were made.


2021 ◽  
Vol 21 (3) ◽  
pp. 526-531
Author(s):  
Andika Surya ◽  
Dedi Arham Al Anzari ◽  
Ana Juniarti ◽  
Arman Setiawan

Penelitian ini mempunyai kelebihan diantaranya mampu menjadi salah satu alternatif untuk mengurangi jumlah sampah plastik jenis PET sebagai salah satu bahan kontruksi yaitu paving block yang ramah lingkungan dan dapat digunakan sebagai pengerasan jalan, taman maupun pelataran parkir. Paving block adalah suatu komposisi bahan bangunan yang terbuat dari campuran semen portland atau bahan perekat hidrolis lainnya, air dan agregat dengan atau tanpa bahan tambahan lainnya yang tidak mengurangi mutu beton tersebut (SNI 03-0691-1996). Komposisi paving block yang akan dibuat pada karya ini terdiri dari semen portland,pasir,limbah plastik dan air sebagai campuran yang akan direncanakan pada perancangan pembuatan paving block. Masyarakat belum banyak mengetahui bahwasanya plastik juga bisa dijadikan salah satu bahan kontruksi dengan menjadi bahan tambahan. Paving block dengan plastik ini tidak bisa diragukan kekuatannya seperti paving block pada umumnya. Karena dari penelitian sebelumnya menunjukkan bahwa paving block dengan menggunakan serat yang terdapat pada plastik dapat meningkatkan kuat tekan pada paving. Hasil uji menunjukkan bahwa hasil paving block campuran 1: 3 dengan kuat tekan paving normal 18.07 Mpa dan paving block campuran 1:6 dengan kuat tekan paving normal 11.32 MPa maka dapat diperkirakan hasil narrative review yang sesuai penelitian kami adalah sebagai berikut, pada paving block komposisi 1: 4, kuat tekan target yang terjadi direncanakan sebesar 15 Mpa dan paving block kompisisi 1:5 kuat tekan target rencana direncanakan sebesar 13 Mpa dengan tingkat kepercayaan data R = 0.9798 dari penggambungan data sebelumnya,Dengan penggunaan subtitusi plastic terhadap pasir, maka ditargetkan akan terjadi peningkatan kuat tekan sebesar 30% dari paving block tanpa penggunaan plastic di komposisi subtitusi plastic sebesar 40%.Berdasarkan SNI 03-0691-1996 tentang klarifikasi mutu paving block, komposisi paving dengan subtitusi plastic 1 : 4 dan 1 : 5 cocok untuk digunakan pada taman kota dan pedestrian untuk pejalan kaki. Then, what if the plastic waste can be used. This research has advantages such as being able to be an alternative to reduce the amount of PET plastic waste as a construction material, namely paving blocks that are environmentally friendly and can be used as paving roads, parks and parking lots. Paving block is a building material composition made of a mixture of portland cement or other hydraulic adhesives, water and aggregates with or without other additives that do not reduce the quality of the concrete (SNI 03-0691-1996). The composition of the paving blocks that will be made in this work consists of portland cement, sand, plastic waste and water as a mixture that will be planned in the design of making paving blocks. People don't know much that plastic can also be used as a construction material by becoming an additional material. Paving blocks with plastic cannot be doubted as strong as paving blocks in general. This is because previous research shows that paving blocks using fibers found in plastic can increase the compressive strength of paving. The test results show that the results of a 1:3 mixed paving block with a normal compressive strength of 18.07 MPa and a mixed paving block of 1:6 with a normal compressive strength of 11.32 MPa can then be estimated that the results of a narrative review according to our research are as follows, on the paving block composition. 1: 4, the planned target compressive strength is 15 MPa and the paving block composition 1:5 is the planned target compressive strength is 13 MPa with a data confidence level of R = 0.9798 from combining the previous data. With the use of plastic substitution for sand, it is targeted to there is an increase in compressive strength of 30% from paving blocks without the use of plastic in the composition of plastic substitution by 40%. city parks and pedestrians for pedestrians.


2017 ◽  
Vol 2 (1) ◽  
pp. 38
Author(s):  
Suhendra Suhendra

Currently, rigid pavement in almost all national, provincial and district roads is used instead of flexible pavement. One of the rigid concrete pavement quality controls is the flexural strength (fr = 45 kg / cm2 at 28 days) as stated in the General Specification of Binamarga year 2010 revision 3. This specification no longer regulates the value of compressive strength of the rigid pavement. This is a challenge for the construction’s practicians in implementation of the specification, because during this time the procurement of cement concrete is based on the compressive strength. The formula is in SNI 2847: 2013 on concrete that fr = 0,62Öfc’. While the construction practitioners generally still use the binamarga specifications of previous revisions that contain the quality of concrete (K-350), so that the quality of bending in general is not achieved. This research covers the value of bending test results conducted in the Engineering Laboratory on beams provided by third parties using lab services, as well as test specimens made in the laboratory. The test results show that there is a correlation between the flexure strength to the compressive strength of the concrete. The relationship is more or less the same as the formula contained in SNI concrete.Keywords: Concrete, Flexure strength, compressive strength, Binamarga Specs 2010 rev. 3


2019 ◽  
Vol 9 (01) ◽  
pp. 47-54
Author(s):  
Rabbai San Arif ◽  
Yuli Fitrisia ◽  
Agus Urip Ari Wibowo

Voice over Internet Protocol (VoIP) is a telecommunications technology that is able to pass the communication service in Internet Protocol networks so as to allow communicating between users in an IP network. However VoIP technology still has weakness in the Quality of Service (QoS). VOPI weaknesses is affected by the selection of the physical servers used. In this research, VoIP is configured on Linux operating system with Asterisk as VoIP application server and integrated on a Raspberry Pi by using wired and wireless network as the transmission medium. Because of depletion of IPv4 capacity that can be used on the network, it needs to be applied to VoIP system using the IPv6 network protocol with supports devices. The test results by using a wired transmission medium that has obtained are the average delay is 117.851 ms, jitter is 5.796 ms, packet loss is 0.38%, throughput is 962.861 kbps, 8.33% of CPU usage and 59.33% of memory usage. The analysis shows that the wired transmission media is better than the wireless transmission media and wireless-wired.


1993 ◽  
Vol 28 (2) ◽  
pp. 17-26 ◽  
Author(s):  
V. Eroǧlu ◽  
A. M. Saatçi

Recent advances made in the reuse of pulp and paper industry sludges in hardboard production are explained. Data obtained from pilot and full-scale plants using primary sludge of a pulp and paper industry as an additive in the production of hardboard is presented. An economic analysis of the reuse of pulp and paper primary sludge in hardboard manufacturing is given. The quality of the hardboard produced is tested and compared with the qualities of the hardboard produced by the same plant before the addition of primary sludge. The hardboard with primary sludge additive has been used in Turkey for about a year in the manufacturing of office and home furniture. The results are very satisfactory when the primary sludge is used at 1/4 ratio.


2020 ◽  
Vol 96 (3s) ◽  
pp. 392-395
Author(s):  
В.А. Бутузов ◽  
А.Е. Назаренко ◽  
Н.Ю. Дмитриев ◽  
В.А. Трофимов ◽  
В.А. Косевский ◽  
...  

Представлены результаты разработки цифрового изолятора на основе интегрального микротрансформатора в специализированном корпусе, выполненном по технологии низкотемпературной совместно обжигаемой керамики (LTCC). Согласно результатам измерений тестовых образцов максимальная скорость передачи данных разработанного цифрового изолятора - не менее 30 Мбит/с. The paper presents the results of the development of a digital insulator based on an integral microtransformer in a specialized package made in technology of low-temperature co-fired ceramics. The isolator is a microassembly consisting of a transceiver chip and an integrated transformer. According to the test results, the maximum data rate speed of the developed digital insulator is not less than 30 Mbit/s.


2021 ◽  
Vol 10 (4) ◽  
pp. 196
Author(s):  
Julio Manuel de Luis-Ruiz ◽  
Benito Ramiro Salas-Menocal ◽  
Gema Fernández-Maroto ◽  
Rubén Pérez-Álvarez ◽  
Raúl Pereda-García

The quality of human life is linked to the exploitation of mining resources. The Exploitability Index (EI) assesses the actual possibilities to enable a mine according to several factors. The environment is one of the most constraining ones, but its analysis is made in a shallow way. This research is focused on its determination, according to a new preliminary methodology that sets the main components of the environmental impact related to the development of an exploitation of industrial minerals and its weighting according to the Analytic Hierarchy Process (AHP). It is applied to the case of the ophitic outcrops in Cantabria (Spain). Twelve components are proposed and weighted with the AHP and an algorithm that allows for assigning a normalized value for the environmental factor to each deposit. Geographic Information Systems (GISs) are applied, allowing us to map a large number of components of the environmental factors. This provides a much more accurate estimation of the environmental factor, with respect to reality, and improves the traditional methodology in a substantial way. It can be established as a methodology for mining spaces planning, but it is suitable for other contexts, and it raises developing the environmental analysis before selecting the outcrop to be exploited.


Author(s):  
H Eyigor ◽  
E A Cetinkaya ◽  
D T Coban ◽  
G Ozturk ◽  
Ö Erdem

Abstract Objective External dacryocystorhinostomy is thought to cause mucociliary dysfunction by damaging the mucosa, in turn affecting ciliary activity and mucus quality. This study investigated the effect of external dacryocystorhinostomy on sinonasal function. Methods Patients scheduled for unilateral external dacryocystorhinostomy who underwent endoscopic nasal examination and paranasal sinus computed tomography were included in this study. A saccharine test was performed on the planned surgical side and the mucociliary clearance time was determined. The sinonasal quality of life was measured in all patients, pre-operatively and at six months post-operatively, using the Sino-Nasal Outcome Test-22. The Lund–Kennedy endoscopic score was also determined in all patients, both pre- and post-operatively. Results The study comprised 28 patients (22 females and 6 males). A statistically significant difference was found between the pre- and post-operative saccharine test results (p = 0.006), but not between the pre- and post-operative Sino-Nasal Outcome Test-22 scores (p > 0.05). Conclusion This study is one of only a few to investigate the effect of external dacryocystorhinostomy on sinonasal function. The results showed that external dacryocystorhinostomy impairs mucociliary clearance. The surgical procedure is well tolerated and does not significantly change nasal symptom scores.


2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Donato Lacedonia ◽  
Giulia Scioscia ◽  
Piera Soccio ◽  
Massimo Conese ◽  
Lucia Catucci ◽  
...  

Abstract Background Idiopathic Pulmonary Fibrosis (IPF) is a degenerative interstitial lung disease with both a poor prognosis and quality of life once the diagnosis is made. In the last decade many features of the disease have been investigated to better understand the pathological steps that lead to the onset of the disease and, moreover, different types of biomarkers have been tested to find valid diagnostic, prognostic and therapy response predictive ones. In the complexity of IPF, microRNA (miRNAs) biomarker investigation seems to be promising. Methods We analysed the expression of five exosomal miRNAs supposed to have a role in the pathogenesis of the disease from serum of a group of IPF patients (n = 61) and we compared it with the expression of the same miRNAs in a group of healthy controls (n = 15). Results In the current study what emerged is let-7d down-regulation and, unexpectedly, miR-16 significant down-regulation. Moreover, through a cross-sectional analysis, a clustering of the expression of miR-16, miR-21 and miR-26a was found. Conclusions These findings could help the individuation of previously unknown key players in the pathophysiology of IPF and, most interestingly, more specific targets for the development of effective medications.


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