DAYA TAHAN ROTAN YANG DIAWETKAN DENGAN  CUKA KAYU GALAM TERHADAP SERANGAN BUBUK  Dinoderus minutus Farb.

Rattan on frequently attacked by the powder post beetle (Tellu, 2001). The prevention of dry powder attacks is done by preservation. The increasing resistant of rattan from insect attack can be done by an environmentally friendly preservative, the Galam wood vinegar. This research aims to determine the most effective concentration of preservative that shows the lowest attacks level of D. Farb minutus powder. The rattan used is green rattan (Calamus sp.) The concentration of preservative that are used:10%, 40%, 70% and 100%. The testing of dry powder attack used force feedback method. The effectiveness test parameters of wood vinegar to dry powder attacks included degree of protection Dinoderus minutus Farb. powder, reduction percentage of rattan weight and the mortality of dry powder Dinoderus sp for toxicological testing of wood vinegar. The test results showed that the degree of protection powder in rattan growing along with the increased concentration of preservatives. The higher the concentration of wood vinegar, the smaller the reduction of rattan weight and the higher the mortality rate of dry powder. Keywords: resistant of rattan, wood vinegar, Dinoderus minutus.

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Modeling the Tensile Behaviour of a SiC/SiC Composite by Master Curves

Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education ◽

10.1115/2000-gt-0066 ◽

2000 ◽

Author(s):

J. Shi

Keyword(s):

Master Curve ◽

Ceramic Matrix Composites ◽

Test Material ◽

Tensile Behaviour ◽

Matrix Composites ◽

Test Results ◽

Master Curves ◽

The Past ◽

Test Parameters ◽

Tensile Data

Scatter in test results is common for relatively brittle materials such as ceramic matrix composites. The scatter may come from differences in material processing conditions, specimen machining/handling and from variations in test parameters for nominally the same test material. Large scatter in test results makes material modeling difficult. In the past, master curve concepts have been proposed to reduce scatter in tensile data and to interpret fatigue/creep results. In this paper, one such concept is examined in detail by applying it to the recent tensile test results of a SiC/SiC composite. It was found that the way to construct master curves did not apply to the CMC studied and thus a new master curve was developed to better represent the tensile data. In addition, the test data were analysed statistically based on the new master curve.

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analysis of mechanical properties of ceiling boards based on corn cobs and coconut coir waste with latex adhesive

FISITEK : Jurnal Ilmu Fisika dan Teknologi ◽

10.30821/fisitekfisitek.v5i2.10003 ◽

2021 ◽

Vol 5 (2) ◽

pp. 1

Author(s):

Ety Jumiati ◽

Ufik Eliati Tumanggor ◽

Abdul Halim Daulay

Keyword(s):

Mechanical Properties ◽

Flexural Strength ◽

Fracture Strength ◽

Test Results ◽

Hot Press ◽

Optimal Result ◽

Corn Cob ◽

Corn Cobs ◽

Test Parameters ◽

Coconut Coir

AbstractCeiling evelopment by utilizing waste corn cobs, coconut coir with gypsum flour an the adition of latex adhesive. Variations in the composition of the mixture of corn cobs, coconut coir, gypsum flour with latex adhesive include sample A (0:0:100:15), sample B (3:3:94:15), sample C (6:6:88:15), sample D (9:9:82:15), sample E (12:12:76:15), and sample F (15:15:70:15) with emphasis using a hot press and drying for 28 days. The test parameters include flexural strength and fracture strength. The test results show that sample B in the composition (3:3:94:15) is the optimal result. In this composition, the resulting ceiling board has the characteristics of a flexural strength of 3966,39 kgf/cm2 and a fracture strength of 1088,6 kgf/cm2.Keyword : Lateks , Ceiling Board, Coconut Coir, Corn Cob

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Durability of BFRP and Hybrid FRP Sheets under Freeze-Thaw Cycling

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.3297 ◽

2010 ◽

Vol 163-167 ◽

pp. 3297-3300 ◽

Cited By ~ 9

Author(s):

Jia Wei Shi ◽

Hong Zhu ◽

Zhi Shen Wu ◽

Gang Wu

Keyword(s):

Mechanical Properties ◽

Test Data ◽

Mechanical Characteristics ◽

Test Results ◽

Freeze Thaw ◽

Frp Composites ◽

Test Parameters ◽

The Stability ◽

Better Than

Coupon tests were conducted to investigate the mechanical characteristics of basalt FRP (BFRP) sheet, basalt-carbon hybrid FRP sheets and the corresponding epoxy rein under the effect of freeze-thaw cycling. FRP sheets and epoxy rein coupons were subjected to up to 200 and 250 freeze-thaw cycles respectively. Test parameters included the number of freeze-thaw cycles and the types of FRP composites. Test results show that (1) BFRP sheet perform better than CFRP or GFRP sheets under high freeze-thaw cycles; (2) exposed hybrid FRP sheets not only show very little loss in mechanical properties, but also contribute to the stability of test data; (3) mechanical properties of rein epoxy decrease significantly with increasing freeze-thaw cycles.

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Study of the effect of test parameters on the assessment of steel resistance to carbon dioxide corrosion

Industrial laboratory Diagnostics of materials ◽

10.26896/1028-6861-2021-87-12-42-47 ◽

2021 ◽

Vol 87 (12) ◽

pp. 36-41

Author(s):

A. S. Fedorov ◽

E. L. Alekseeva ◽

A. A. Alkhimenko ◽

N. O. Shaposhnikov ◽

M. A. Kovalev

Keyword(s):

Carbon Dioxide ◽

Laboratory Tests ◽

Oil And Gas ◽

Oil And Gas Industry ◽

Sample Surface ◽

Test Results ◽

Carbon Dioxide Corrosion ◽

Gas Industry ◽

Test Parameters ◽

Repeatability And Reproducibility

Carbon dioxide (CO2) corrosion is one of the most dangerous types of destruction of metal products in the oil and gas industry. The field steel pipelines and tubing run the highest risk. Laboratory tests are carried out to assess the resistance of steels to carbon dioxide corrosion. However, unified requirements for certain test parameters are currently absent in the regulatory documentation. We present the results of studying the effect of the parameters of laboratory tests on the assessment of the resistance of steels to CO2 corrosion. It is shown that change in the parameters of CO2 concentration, chemical composition of the water/brine system, the buffer properties and pH, the roughness of the sample surface, etc., even in the framework of the same laboratory technique, can lead in different test results. The main contribution to the repeatability and reproducibility of test results is made by the concentration of CO2, pH of the water/brine system, and surface roughness of the samples. The results obtained can be used in developing recommendations for the choice of test parameters to ensure a satisfactory convergence of the results gained in different laboratories, as well as in elaborating of a unified method for assessing the resistance of steels to carbon dioxide corrosion.

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First Test Results of a Haptic Tele-Operation System to Enhance Stability of Telescopic Handlers

ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, Volume 3 ◽

10.1115/esda2010-25305 ◽

2010 ◽

Cited By ~ 2

Author(s):

Stefano Cenci ◽

Giulio Rosati ◽

Damiano Zanotto ◽

Fabio Oscari ◽

Aldo Rossi

Keyword(s):

Degrees Of Freedom ◽

Force Feedback ◽

Control Strategies ◽

Input Device ◽

Test Results ◽

Operation System ◽

Work Related ◽

Control Schemes ◽

Working Capability ◽

Stiff Joint

According to a recent report of ILO (International Labour Organization), more than two million people die or loose the working capability every year because of accidents or work-related diseases. A large portion of these accidents are related to the execution of motion and transportation tasks involving heavy duty machines. The insufficient degree of interaction between the human operator and the machine may be regarded as one of the major causes of this phenomenon. The main goal of the tele-operation system presented in this paper is to both preserving slave (machine) stability, by reducing the inputs of slave actuators when certain unsafe working conditions occur, and improving the level of interaction at master (operator) side. Different control schemes are proposed in the paper, including several combinations of master and slave control strategies. The effectiveness of the algorithms is analyzed by presenting some experimental results, based on the use of a two degrees-of-freedom force feedback input device (with one active actuator and one passive stiff joint) coupled with a simulator of a telescopic handler.

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Analysis and Testing of Debris Monitoring Sensors for Aircraft Lubrication Systems

Proceedings ◽

10.3390/icem18-05360 ◽

2018 ◽

Vol 2 (8) ◽

pp. 461 ◽

Cited By ~ 1

Author(s):

Etienne Harkemanne ◽

Olivier Berten ◽

Patrick Hendrick

Keyword(s):

Test Bench ◽

Aircraft Engine ◽

Engine Oil ◽

Oil Lubrication ◽

Aircraft Engines ◽

Test Results ◽

Functional Tests ◽

Test Plan ◽

Test Parameters ◽

Oil Flow

In an aircraft engine, some pieces are describing a rotating movement. These parts are in contact with rotating and non-rotating parts through the bearings and gears. The different contact patches are lubricated with oil. During the lifetime of the engine, mechanical wear is produced between the contacts. This wear of the bearings and gears will produce some debris in the oil circuit of the engine. To ensure the effective operation of the aircraft engines, the debris monitoring sensors play a significant role. They detect and collect the debris in the oil. The analysis of the debris can give an indication of the overall health of the engine. The aim of the paper is to develop, design and model an oil test bench to simulate the oil lubrication circuit of an aircraft engine to test two different debris monitoring sensors. The methodology consists of studying the oil lubrication system of the aircraft engine. The first step is to build the oil test bench. Once the oil test bench is functional, tests are performed on the two debris monitoring sensors. A test plan is followed, three sizes of debris, like the type and sizes of debris found in the aircraft engine oil, are injected in the oil. The test parameters are the oil temperature, the oil flow rate and the mass of debris injected. Each time debris is injected, it is detected and caught by the two sensors. The test results given by the two sensors are similar to the mass debris injected into the oil circuit. The two sensors never detect the total mass of debris injected in the oil. On average, 55%–60% of the mass injected is detected and caught by the two sensors. The sensors are very efficient at detecting debris whose size corresponds to the design range parameters of the sensors, but the efficiency falls when detecting debris whose size lies outside this range.

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Acidification during anaerobic treatment of brewery wastewater

Water Science & Technology ◽

10.2166/wst.1997.0322 ◽

1997 ◽

Vol 35 (8) ◽

pp. 265-274 ◽

Cited By ~ 5

Author(s):

Hitomi Suzuki ◽

Yutaka Yoneyama ◽

Toshihiro Tanaka

Keyword(s):

Retention Time ◽

Experimental Tests ◽

Anaerobic Treatment ◽

Test Results ◽

Optimal Conditions ◽

Batch Test ◽

Brewery Wastewater ◽

Methanogenic Activity ◽

Flow Test ◽

Reduction Percentage

Several experimental tests were performed to study acidification during the anaerobic treatment of brewery wastewater. Batch test results suggested that a pH of 5-6 and a water temperature of 40°C were optimal conditions for acidification. Continuous-flow test results indicated a tendency for the carbohydrate reduction percentage to become higher with longer retention time in the acidification reactor. A high Specific Methanogenic Activity (SMA) of over 1.4 kg COD kg−1 MLVSS d−1 was observed, which the carbohydrate reduction percentage exceeded 75%. However, there was a tendency for the SMA to become lower due to residues of highly concentrated carbohydrates. The carbohydrate reduction percentage dropped to below 60% in the acidification treated water, when the retention time in the acidification reactor was extremely short. For achieving a carbohydrate reduction percentage of more than 75%, the retention time showed a tendency to become longer with higher organic concentration (e.g. COD 2,500-4,000 mg l−1: 3 h, COD 5,000-8,000 mg l−1: 6 h, and COD 10,000-16,000 mg l−1: 12 h).

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Targeting Magnetic Nanoparticles in High Magnetic Fields for Drug Delivery Purposes

MRS Proceedings ◽

10.1557/proc-820-o3.8 ◽

2004 ◽

Vol 820 ◽

Cited By ~ 3

Author(s):

Ramazan Asmatulu ◽

Richard.O. Claus ◽

Judy S. Riffle ◽

Michael Zalich

Keyword(s):

Magnetic Field ◽

Drug Delivery ◽

Magnetic Nanoparticles ◽

Magnetic Fields ◽

Magnetic Particles ◽

Guidance System ◽

Test Results ◽

Test Parameters ◽

Magnetic Guidance ◽

The Magnetic Field

AbstractBiodegradable magnetic nanoparticles were synthesized using Poly(L-Lactic Acid) and magnetite nanoparticles (∼14 nm) at different dosages, and then these nanaoparticles (nanocomposites) and pure magnetic particles were targeted in external magnetic fields by changing the test parameters. The magnetic field test results showed that magnetic saturation, fluid speed, magnetic field distance and particle size were extremely effective for a magnetic guidance system that is needed for an effective drug delivery approach. Thus, it is assumed that such nanoparticles can carry drugs (chemotherapy) to be able to cure cancer tumors as well as many other diseases.

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