scholarly journals Kajian Perbandingan Penggunaan Berbagai Merek Semen Dengan Dan Tanpa Perawatan Terhadap Kuat Tekan Dan Kuat Lentur Beton Pada Perkerasan Kaku

2018 ◽  
Vol 18 (2) ◽  
pp. 33-42
Author(s):  
Sugeng Wiyono ◽  
Zulhendri Zulhendri ◽  
Mohd. Alfajrizal ◽  
Anas Puri
Keyword(s):  
Bending Strength ◽  
High Strength ◽  
Cement Concrete ◽  
Age Range ◽  
Selection Of ◽  
Better Than ◽  
Curing Cement

[ID] Semen merupakan suatu bahan pembentuk beton yang berperan sangat penting untuk mencapai mutu yang direncanakan. Selain pemilihan jenis merek semen, salah satu cara untuk mendapatkan kualitas beton yang baik yaitu dengan cara melakukan perawatan. penelitian ini bertujuan untuk mengetahui sejauh mana kualitas tiga merek semen terhadap kuat tekan dan kuat lentur beton disamping itu juga bertujuan untuk mengetahui seberapa besar perbedaan kekuatan dari masing- masing merek semen terhadap beton yang dirawat dan tanpa dirawat. Pada penelitian ini menggunakan metode eksperimental yang sesuai dengan SK SNI T-15-1990-03. Penelitian ini menggunakan semen  Padang, semen Holcim, dan semen Bosowa, dengan menggunakan jenis perawatan perendaman pada sampel beton, pengujian yang dilakukan adalah pengujian kuat tekan dan kuat lentur dengan mutu rencana fc 30 MPa dengan umur 7, 14, 28, dan 56 hari, untuk masing-masing umur dibuat 3 benda uji dirawat dan 3 benda uji tidak dirawat. Dari hasil uji kuat tekan rata-rata semen padang memiliki kekuatan 32,65 MPa, semen holcim 31,33 MPa dan semen bosowa  30,86 MPa. Sedangkan untuk pengujian kuat lentur semen padang 4,35 MPa, semen holcim 4,23 MPa dan semen bosowa 4,18MPa, sementara beton yang tidak dirawat memiliki nilai lebih rendah dari beton yang dirawat.. Dari hasil pengujian tersebut dapat dilihat bahwa pemakaian merek semen perlu diperhatikan karakteristiknya serta perawatan mempunyai konstribusi yang cukup besar dalam mendapatkan mutu beton hasil pelaksanaan. [EN] The cement concrete as product that consit of several element which is important for achieve the quality that be planed. To choose same kriteria for getting the good quality of concrete, one of way are choosing the brand of cement and doing curing. Therfore, the aim of this research is ro know about the strength of of each brand of cement toword cured and uncuret concrete. This research used cement padang, cement holcim, cement bosowa with soaking treatments of concrete samples. The used of the tests are compresive and bending strength of concrete with using quality plan fc’ 30 MPa and age range 7, 14, 28 and 56 days. The cement padang is better than others cement and by getting the the highest value also found cement Padang has the sensitivity to the curing. Cement Bosowa got high strength at the beginning of the age and for cement Holcim is relativity stable with the age. From the researh, knowed that is important the selection of cement brand and curing to get the good result consist of the quality by yhe first plan.

Implementasi Voip Server Berbasis IPV6 Dengan Raspberry PI

2019 ◽  
Vol 9 (01) ◽  
pp. 47-54
Author(s):  
Rabbai San Arif ◽  
Yuli Fitrisia ◽  
Agus Urip Ari Wibowo
Keyword(s):  
Internet Protocol ◽  
Wireless Transmission ◽  
Raspberry Pi ◽  
Test Results ◽  
Average Delay ◽  
Ipv6 Network ◽  
Ip Network ◽  
Selection Of ◽  
Better Than

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.

scholarly journals Nutrição enteral em sistema fechado para pediatria: escolha com base na disponibilidade no comércio brasileiro e na rotulagem

2020 ◽  
Vol 35 (1) ◽  
pp. 70-76
Author(s):  
Anelise Pigatto Bissacotti ◽  
Franceliane Jobim Benedetti
Keyword(s):  
Enteral Nutrition ◽  
Closed System ◽  
Clinical Situation ◽  
Nutritional Composition ◽  
Enteral Diet ◽  
Pediatric Nutrition ◽  
Age Range ◽  
Selection Of ◽  
Better Than

Introduction: The enteral diet (ED) for pediatric nutrition should ensure the appropriate nutritional intake for the child and/or adolescent. Therefore, during the selection of ED, in addition to the patient’s needs, the characteristics and nutritional composition of the patients should be taken into account. Thus, the objective was to identify and characterize the diets for pediatric enteral nutrition, in a closed system, currently available in the Brazilian market, in order to assist nutritionists and doctors in prescription. Methods: The descriptive and documental research consisted in the identification of the diets for pediatric enteral nutrition, in a closed system, currently available in the Brazilian market and characterization of the diets, based on labeling data. The data of interest for the development of this study were collected in catalogs and official websites of the manufacturers and suppliers and books of enteral nutrition and nutrition in pediatrics. Results: In Brazil, nine pediatric enteral nutrition diets are available in a closed system, marketed by three manufacturers. It was found that the diets for pediatric enteral nutrition can be indicated for a wide age range, from one to 10 years and patients in different pathophysiological states. There is little variation in the levels and sources of macronutrients. Four enteral diets present fibers in their composition and 5 are hypotonic. Conclusions: The Brazilian market has a limited number of diets for pediatric enteral nutrition in a closed system, which makes prescribing a challenge for nutritionists and doctors. It can not be said that a particular pediatric enteral diet in closed system is better than another, each one has specific characteristics. This makes it necessary for to carefully evaluate the professionals adequacy of the diet to the patient’s clinical situation and individuality.

Neighborhood Evaluation in Recommender Systems Using the Realization Based Entropy Approach

2014 ◽  
Vol 1 (4) ◽  
pp. 34-50
Author(s):  
Roee Anuar ◽  
Yossi Bukchin ◽  
Oded Maimon ◽  
Lior Rokach
Keyword(s):  
Recommender Systems ◽  
Entropy Measure ◽  
Continuous Data ◽  
System Evaluation ◽  
Rating Data ◽  
New Approach ◽  
Selection Of ◽  
Classical Entropy ◽  
Better Than

The task of a recommender system evaluation has often been addressed in the literature, however there exists no consensus regarding the best metrics to assess its performance. This research deals with collaborative filtering recommendation systems, and proposes a new approach for evaluating the quality of neighbor selection. It theorizes that good recommendations emerge from good selection of neighbors. Hence, measuring the quality of the neighborhood may be used to predict the recommendation success. Since user neighborhoods in recommender systems are often sparse and differ in their rating range, this paper designs a novel measure to asses a neighborhood quality. First it builds the realization based entropy (RBE), which presents the classical entropy measure from a different angle. Next it modifies the RBE and propose the realization based distance entropy (RBDE), which considers also continuous data. Using the RBDE, it finally develops the consent entropy, which takes into account the absence of rating data. The paper compares the proposed approach with common approaches from the literature, using several recommendation evaluation metrics. It presents offline experiments using the Netflix database. The experimental results confirm that consent entropy performs better than commonly used metrics, particularly with high sparsity neighborhoods. This research is supported by The Israel Science Foundation, Grant #1362/10. This research is supported by NHECD EC, Grant #218639.

scholarly journals Electoral Reform and Trade-Offs in Representation

2019 ◽  
Vol 113 (3) ◽  
pp. 694-709 ◽  
Author(s):  
MICHAEL BECHER ◽  
IRENE MENÉNDEZ GONZÁLEZ
Keyword(s):  
Electoral System ◽  
Electoral Reform ◽  
Electoral Institutions ◽  
Policy Responsiveness ◽  
Difference Analysis ◽  
Voter Preferences ◽  
Trade Offs ◽  
Selection Of ◽  
Better Than

We examine the effect of electoral institutions on two important features of representation that are often studied separately: policy responsiveness and the quality of legislators. Theoretically, we show that while a proportional electoral system is better than a majoritarian one at representing popular preferences in some contexts, this advantage can come at the price of undermining the selection of good politicians. To empirically assess the relevance of this trade-off, we analyze an unusually controlled electoral reform in Switzerland early in the twentieth century. To account for endogeneity, we exploit variation in the intensive margin of the reform, which introduced proportional representation, based on administrative constraints and data on voter preferences. A difference-in-difference analysis finds that higher reform intensity increases the policy congruence between legislators and the electorate and reduces legislative effort. Contemporary evidence from the European Parliament supports this conclusion.

scholarly journals Farmers’ perception on quality of fish feed, brood stock and fingerling produced in commercial fish farms of Bangladesh

2020 ◽  
Vol 32 (1) ◽  
pp. 141-147
Author(s):  
MD. SAZEDUR RAHMAN ◽  
HASSAN MAHMUD RIAD ◽  
MD. SAYEM MAHMUD ◽  
MST. KANIZ FATEMA ◽  
MD. SHAHJAHAN
Keyword(s):  
Open Water ◽  
Production Quality ◽  
Fish Feed ◽  
Fish Farms ◽  
Brood Stock ◽  
Commercial Fish ◽  
Commercial Feed ◽  
Selection Of ◽  
Better Than

In Bangladesh, aquaculture has expanded, diversified, intensified and technologicallyadvanced due to the decline in fish production from the open water natural sources. Quality seedsare prime requirements for aquaculture production. Quality of seeds depends on the quality ofbroods used for spawning. Breeding performance depends on the quality of feeds and feedingmanagement during brood stock rearing. The present study focused on the evaluation of qualityof feed used in the fish farms, the performance of brood stock and fingerlings of selected carp,catfish and perch farmed in Bangladesh through a survey. On the basis of top fish productiondistricts, we divided the whole country into four hubs, such as Mymensingh, Jashore, Cumillaand Rajshahi. Data were collected from 300 individual respondents of commercial fish farms, 75from each hub. It has been found that most of the farm owners (91%) used commercial feedinstead of homemade feed, though a considerable number of respondents replied that quality ofhomemade feed was better than commercial feed. Although most of the farm owners collect fryfrom private/own hatcheries (69%), a considerable number of grow out farms owners replied thatthe fry of government hatcheries/brood bank, river and BFRI were better than private hatcheriesin terms of growth performance, disease resistance and survivability. Therefore, for sustainableaquaculture, farm owners should be careful for the selection of feed, brood and fingerling.

scholarly journals THE OPINION OF CROWD PARTICIPATORY FOR OPENSTREETMAP: A SURVEY IN CHINA

2018 ◽  
Vol XLII-3 ◽  
pp. 1525-1531 ◽  
Author(s):  
J. Shen ◽  
S. Yang ◽  
K. Zang ◽  
J. Zhou ◽  
H. Fan ◽  
...  
Keyword(s):  
Uneven Development ◽  
User Survey ◽  
Land Area ◽  
Western Countries ◽  
Governmental Agencies ◽  
The World ◽  
Source Studies ◽  
Age Range ◽  
Better Than

At the present, OpenStreetMap (OSM) is considered as one of the most successful and popular VGI (Volunteered Geographic Information) projects. It provides a platform that all the registered members coming from different areas in the world can cooperate with each other to mapping our world. Besides, OSM attracts more and more people, companies and even the governmental agencies because of its free and open source. Studies have proofed that both the quantity and quality of OSM data in several western countries, i.e. Germany, France and the Netherland are even better than the authority data. In recent years, the quantity of the OSM data and the number of contributors in China increased rapidly, but the overall distribution of OSM data is very fit with the distribution of population and the economic development and it displays an uneven development in different provinces and cities in China. Besides, the state of the OSM in China is just similar to that in Germany in 2010 in terms of data quantity and quality, although China is about 25 times to Germany regarding land area and the smartphone penetration in China and Germany does not have a large distance (51.7 % to 68.8 %). Why is the development of OSM in China so poor and backward when comparing that with western countries, although the environment in hardware and software in China are similar to the western countries? Attempting to answer this question, this paper presents a user survey in China. Mainly, knowledges and experiences about OSM and OSM contribution were asked in the user survey. The user survey was conducted both by paper and pen and by using online platform. Totally, over 1200 participants with the age range from 15 to 80 and a huge diverse of background took part in the user survey. In this paper, we would like to describe the design of the questions for the user survey at first. Then we will demonstrate the results of the user survey, as well as the analysis and conclusions, which can be drawn from the user survey.

Preparation of High Strength Mo(Si, Al)2-SiC Composite by Melt Infiltration Process

2009 ◽  
Author(s):  
XiaoLi Zhang
Keyword(s):  
Mechanical Property ◽  
Hot Pressing ◽  
Bending Strength ◽  
High Strength ◽  
Infiltration Process ◽  
Melt Infiltration ◽  
Microstructure And Mechanical Property ◽  
Better Than

The Mo(Si, Al)2-SiC composite was prepared by infiltrating melted aluminum into MoSi2+C compacts at 1350°C, and the microstructure and mechanical property of this composite were analyzed. The results showed that the phases of these composite are Mo(Si1-x, Alx)2 and SiC, and a small amount of Mo5Si3C and Al. Increasing the value of x, the amount of Mo5Si3C and Al phases decrease and even disappear gradually. The microstructure of this composite is sheet-like Mo(Si, Al)2 with needle-like SiC distributed in its gap, and parts of SiC are whisker-like. When x = 0.2, the bending strength of the composite reaches the maximum, which was 770 MPa. The bending strength of designed composite prepared by melt infiltration in this study is better than that of the composite prepared by hot pressing reported in literature.

scholarly journals Effect of SLM Process Parameters on the Quality of Al Alloy Parts; Part II: Microstructure and Mechanical Properties

2018 ◽  
Author(s):  
Ahmed H. Maamoun ◽  
Yi F. Xue ◽  
Mohamed A. Elbestawi ◽  
Stephen C. Veldhuis
Keyword(s):  
Mechanical Properties ◽  
Process Parameters ◽  
High Strength ◽  
Al Alloy ◽  
Microstructure And Mechanical Properties ◽  
Wide Range ◽  
Powder Characteristics ◽  
High Strength Aluminum Alloys ◽  
Selection Of

Additive manufacturing (AM) provides customization of the microstructure and mechanical properties of components. Selective laser melting (SLM) is the commonly used technique for processing high strength Aluminum alloys. Selection of SLM process parameters could control the microstructure of fabricated parts and their mechanical properties. However, process parameter limits and defects inside the as-built parts present obstacles to customized part production. This study is the second part of a comprehensive work that investigates the influence of SLM process parameters on the quality of as-built Al6061 and AlSi10Mg parts. The microstructure of both materials was characterized for different parts processed over a wide range of SLM process parameters. The optimized SLM parameters were investigated to eliminate the internal microstructure defects. Mechanical properties of the parts were illustrated by regression models generated with design of experiment (DOE) analysis. The results reported in this study were compared to previous studies, illustrating how the process parameters and powder characteristics could affect the quality of produced parts.

scholarly journals Parameters of production and quality of new cultivars of perennial leguminous plants as livestock feed

2005 ◽  
Vol 21 (3-4) ◽  
pp. 89-96
Author(s):  
Zorica Tomic ◽  
Zorica Nesic ◽  
Vesna Kmjaja ◽  
Miroslav Zujovic
Keyword(s):  
Red Clover ◽  
Common Species ◽  
Quality Parameters ◽  
Livestock Feed ◽  
Second Year ◽  
Perennial Legumes ◽  
New Cultivars ◽  
Selection Of ◽  
Better Than

This paper presents the results obtained in testing of new selection of four most important and most common species of legumes used for animal feeds in Serbia. Alfalfa, red clover, bird's trefoil and sainfoin are also high quality plants regarding both nutritive substances and yield of dry matter. We have investigated three new selections of alfalfa, two selections of red clover, two selections of bird's trefoil and one of sainfoin in relation to standard ones. Trial lasted two years (2003-2004), designed according to standard methods for testing and recognition of new sorts. The production of green mass through four cuts per year was determined, together with the variation coefficient among cultivars. In the cuts of the second year the quality parameters were determined by standard lab analyses. The content of protein in all three new selections of alfalfa was higher in relation to standard (16,01%). while the standard of red clover with 20,03% was better than new selection. New selections of bird's trefoil are of better quality than standard (22,08 %), which is the case also with sainfoin (19,71 %). On the basis of obtained production and quality parameters the assortment of perennial legumes will be enriched by new cultivars.

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