Experimental Study for the Influencing Factors of Electrograining Quality of PS Plate

2012 ◽  
Vol 200 ◽  
pp. 734-738
Author(s):  
Yi Wen Ma
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Quality Control ◽  
Current Density ◽  
Electrolyte Concentration ◽  
Great Influence ◽  
The Other ◽  
Electrolysis Time ◽  
Orthogonal Experiments

Aiming at quality control of grain of PS plate，the orthogonal experiments on electrolyte concentration, current density, electrolysis temperature and time in the process of electrograining have done by surface roughometer, metalloscope, etc. Experimental results indicate that the electrolyte concentration has great influence on the amplitude parameters of surface roughness, the other factors influence the amplitude parameters and the spacing parameters significantly; the interactions of current density with electrolyte concentration or electrolysis time have not significance.

scholarly journals External Quality Assessment in the Evaluation of Laboratory Performance of Faecal Culture

2017 ◽  
Vol 10 ◽  
pp. 117863611769125
Author(s):  
Salla J Kiiskinen ◽  
Tarja Ojanen ◽  
Yvonne Björkman ◽  
Harri Laitinen ◽  
Anja Siitonen
Keyword(s):  
Public Health ◽  
Quality Control ◽  
External Quality Assessment ◽  
False Negative ◽  
The Other ◽  
Epidemiological Surveillance ◽  
External Quality Control ◽  
External Quality ◽  
Faecal Culture

In Finland, all laboratories carrying out diagnostics of infectious diseases in humans are approved by the Regional State Administrative Agencies and are obligated to participate in External Quality Assurance rounds. Performance in these rounds is thought to reflect the quality of laboratory work. In the 6-year study period, 17 Finnish laboratories received 48 simulated faecal specimens for the culturing of diarrhoeal pathogens, yielding altogether 586 faecal culture External Quality Control specimens and 581 reports. The results were correct in 92% of all reports and in 67% of all specimens. False-negative Salmonella results were given for 2 of the 18 specimens, one with biochemically atypical Salmonella strain and the other with a low count of Salmonella cells. False-negative Shigella report was given for 6 of the 7 specimens in some participating laboratory. Detection of all common faecal pathogens is especially relevant to patient safety, public health, and epidemiological surveillance.

scholarly journals PEMBERIAN STIMULAN PADA BIDANG SADAP DALAM MEMPENGARUHI PRODUKSI DAN KUALITAS LATEKS TANAMAN KARET (Hevea brasiliensis (Muell. Arg.)

2019 ◽  
Vol 4 (1) ◽  
pp. 38
Author(s):  
Hayata Hayata ◽  
Yulistiati Nengsih ◽  
Rahmanto Wibowo
Keyword(s):  
Quality Control ◽  
Ash Content ◽  
The Other ◽  
Rubber Content ◽  
Randomized Design ◽  
Treatment Factor ◽  
Completely Randomized Design ◽  
Four Levels ◽  
Latex Production

Production increasing of latex on rubber plants can be increased by using a stimulants. One of it  is Vicar 10 SL. The purpose of this study was to find out the effect of Vicar 10 SL on the production and quality of latex. This research was carried out in the Kasang Parit Village, Sekernan District, Muaro Jambi Regency, and the Goods Quality Control and Certification Center on Industry and trade department   in Jambi Province. The study was conducted in July to August 2017. The design used was a completely randomized design with one treatment factor as the Vicar 10 SL application with four levels of treatment, namely; Without treatment (V0/control), 1 ml/Tree (V1), 2 ml/tree (V2), 3 ml/tree (V3). There were 4 times  repeatation on each treatment. Using  fingers, a Vicar 10 SL solution was applied to the tapping groove which was adjusted to the treatment, and allowed to keep it 24 hours. Tapping is done in the next morning, by following the grooves and be stored in a cup and left until the latex stoped dripping. Vicar was given once a week during 30 days. Tapping was done 3 times a week. The variables observed were latex production (gram/tree/day), dry rubber content (%), latex ash content (%), and latex dirt content (%). Vicar giving 10 SL in the tapping site with a dose of 2 ml / tree gave the highest yield of latex production (93.38 grams / tree / day) and dry rubber content (75.50%) and was significantly different compared to the other treatments. Vicar giving 10 SL in tapping site had no significant effect on latex dirt content and latex ash contentKeywords: Latex, stimulant, product and quality Abstrak Peningkatan produksi lateks pada tanaman karet dapat ditingkatkan dengan menggunakan stimulan. Salah satu pemakaian yang digunakan adalah Vikar 10 SL. Tujuan penelitian ini adalah untuk megetahui penggunaan stimulan pada bidang sadap dalam mempengaruhi produksi dan kualitas lateks. Penelitian ini dilakukan di Desa kasang Parit Kecamatan Sekernan Kabupaten Muaro Jambi, dan Balai Pengujian dan Sertifikasi Mutu Barang (BPSMB) Disperindag Propinsi Jambi. Penelitian dilakukan pada bulan Juli sampai dengan Agustus 2017. Rancangan yang digunakan adalah Rancangan Acak Lengkap dengan satu faktor perlakuan pemberian stimulan (Vikar 10 SL) dengan empat taraf perlakuan  yaitu; Tanpa perlakuan (V0/kontrol),  1 ml/ Pohon (V1),  2 ml/pohon (V2), 3 ml/pohon  (V3). Setiap perlakuan diulang sebanyak 4 kali. Dengan menggunakan jari dioleskan larutan Vikar 10 SL pada alur sadap  yang disesuaikan dengan perlakuan, dan didiamkan selama 24 jam. Penyadapan dilakukan pada pagi hari esoknya, dengan mengikuti alur torehan dan ditampung dalam cawan dan dibiarkan sampai lateks berhenti menetes. Pemberian Vikar dilakukan sekali 7 hari selama 30 hari. Penyadapan dilakukan  3 kali dalam seminggu. Peubah yang diamati adalah produksi lateks (gram/pohon/hari)), kadar karet kering (%), kadar abu lateks (%), kadar kotoran lateks (%). Pemberian stimulan (Vikar 10 SL) pada bidang sadap dengan dosis 2 ml/pohon memberikan hasil yang tertinggi terhadap produksi lateks 93,38 gram/pohon/hari dan kadar karet kering 75,50 % dan berbeda nyata bila dibandingkan dengan perlakuan lainnya. Pemberian stimulan (Vikar 10 SL) pada bidang sadap berpengaruh tidak nyata terhadap kotoran lateks dan kadar abu lateksKata kunci :Lateks, stimulan, produksi dan kualitas

A Study of the Efficiency of Plate Freezing vs. Blast Freezing of Boxed Boneless Meat in an Abattoir

Volume 1 ◽  
2004 ◽  
Author(s):  
Mir-Akbar Hessami
Keyword(s):  
Experimental Study ◽  
Temperature Measurement ◽  
Working Conditions ◽  
The Other ◽  
Freezing Time ◽  
Air Blast ◽  
Total Cost ◽  
Meat Packaging ◽  
Major Industry

Meat export is a major industry in Australia, and meat packaging and freezing is an energy intensive activity, requiring an objective technical investigation. This study was undertaken in order to assess the relative merits of plate and air blast freezing methods used in industry. To describe the efficiency and the technical superiority of one method over the other, in this paper, the details of an experimental study involving time-temperature measurement of meat boxes inside a plate freezer and a blast freezer under normal working conditions are provided. For the configurations used in this study, it is shown that the freezing time is much shorter for plate freezing, and also there is a much smaller variation in freezing time of various boxes compared to those for blast freezing. The smaller variation in freezing time of various boxes in each batch would help preserve the quality of meat being frozen. Also, it is explained that despite the initial higher capital cost of plate freezing, the total cost over the life of the equipment is much smaller for plate freezing compared to blast freezing.

An Approach to the Influence of Flotative Abrasive Balls on Polishing Process

2006 ◽  
Vol 532-533 ◽  
pp. 393-396 ◽  
Author(s):  
Yong Dai ◽  
Qian Fa Deng ◽  
Xun Lv ◽  
Ju Long Yuan ◽  
Xun Jie Yu
Keyword(s):  
Surface Roughness ◽  
Grain Size ◽  
Removal Rate ◽  
Great Influence ◽  
Work Piece ◽  
Polishing Process ◽  
Soft Contact ◽  
Ball Diameter ◽  
Experiment Device

Polishing with Flotative Abrasive Balls(FABs) is a kind of soft contact polishing means， and the conventional polishing plate and pad are not needed in this case. The pressure of polishing is the flotage which is the upward force that a fluid exerts on the FABs, but the movement of work piece is similar to that in conventional polishing, the removal rate and quality of polishing is influenced by FAB and its flotage. An experiment device is built up and two kinds of FAB are designed and produced. Some primary experiments are carried out in order to investigate the influences of the size of FABs on the removal rate and surface roughness in polishing with FABs. It is found from the experiments that the grain size and the layers of FAB may have great influence on the removal rate of polishing; the surface roughness is mainly decided by the ball diameter and the layers of FAB. The results of experiments are discussed and analyzed, it indicates that the efficiency and quality depend on flotage and the number of active grains when the velocity of workpiece is assigned.

Experimental Study on WEDM Machining of PCD and PCBN Compacts

2015 ◽  
Vol 645-646 ◽  
pp. 52-57 ◽  
Author(s):  
Man Cang Song ◽  
Jian Lei Zhang ◽  
Chao Yu ◽  
Min Jie Wang ◽  
Chong Liu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Particle Size ◽  
Superhard Material ◽  
Cutting Tools ◽  
Interface Layer ◽  
Processing Quality ◽  
Material Layer

Some typical kinds of PCD and PCBN compacts are selected to be machined by WEDM, and a series of processing tests are taken. After machining, the surface roughness of cutting section, the processing quality of cobalt-rich interface layer and the edge of superhard material layer are measured by surface profiler and 3D microscope. The results show that processing quality is affected by superhard particle size and concentration greatly, and better processing quality can be obtained after several cutting of WEDM. The minimum sharpening allowance of PCD cutting tools can be controlled within 4~15μm after WEDM, and within 10μm for PCBN BNX20, while BZN6000 needs larger follow-up workload of sharpening.

Surface Roughness and Wettability Correlation on Etched Platinum Using Reactive Ion Ecthing

2014 ◽  
Vol 487 ◽  
pp. 263-266 ◽  
Author(s):  
Zaliman Sauli ◽  
Vithyacharan Retnasamy ◽  
Aaron Koay Terr Yeow ◽  
Goh Siew Chui ◽  
K. Anwar ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Contact Angle ◽  
Integrated Circuits ◽  
Inductively Couple Plasma ◽  
Great Influence ◽  
Wire Bonding ◽  
Thermal Coefficient ◽  
High Temperature And Pressure ◽  
Temperature And Pressure

As the world of semiconductor is moving towards smaller and high-end applications, the quality of the bonding adhesion for wire bonding is very critical. Although aluminium has been the metallization of choice in integrated circuits, it can be easily oxidized during high temperature and pressure. On the other hand, Platinum metallization layer has high thermal coefficient resistance and inert to oxygen. This paper reports the correlation between surface roughness and the wettability in the form of contact angle for Platinum deposited wafer etched using Inductively Couple Plasma-Reactive Ion Etching (ICP-RIE). Surface roughness was measured using AFM while contact angle was obtained via droplet test. The results clearly suggested that both surface roughness and wettabily, calculated by its contact angle value has the same trend. Surface roughness is directly proportional to the contact angle. This indicates that surface roughness have great influence on the surface wettability. Therefore, the adhesion for wire bonding process on platinum metallization which can be used in high end applications can be controlled by its surface roughness and wettability.

scholarly journals An exploratory test of an intuitive evaluation method of perceived argument strength

2021 ◽  
Author(s):  
Jos Hornikx ◽  
Annemarie Weerman ◽  
Hans Hoeken
Keyword(s):  
Experimental Study ◽  
Exploratory Study ◽  
Evaluation Method ◽  
The Other ◽  
Strength Evaluation ◽  
Evaluation Measures ◽  
Argument Strength ◽  
Validity Measures ◽  
Evaluation Measure

According to Mercier and Sperber (2009, 2011, 2017), people have an immediate and intuitive feeling about the strength of an argument. These intuitive evaluations are not captured by current evaluation methods of argument strength, yet they could be important to predict the extent to which people accept the claim supported by the argument. In an exploratory study, therefore, a newly developed intuitive evaluation method to assess argument strength was compared to an explicit argument strength evaluation method (the PAS scale; Zhao et al., 2011), on their ability to predict claim acceptance (predictive validity) and on their sensitivity to differences in the manipulated quality of arguments (construct validity). An experimental study showed that the explicit argument strength evaluation performed well on the two validity measures. The intuitive evaluation measure, on the other hand, was not found to be valid. Suggestions for other ways of constructing and testing intuitive evaluation measures are presented.

scholarly journals Investigation of the Effect of Vibration Characteristics on the Grinding Performance of Aero-Engine Blade Tip

2021 ◽  
Author(s):  
Wei Li ◽  
Qidi Chen ◽  
Jian Wu ◽  
Mingjia Liu ◽  
Yinghui Ren ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Great Influence ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Aero Engine ◽  
Engine Blade ◽  
Blade Tip ◽  
The Difference

Abstract The machining quality of the blade tip has a great influence on the service performance and life of the aero-engine blade. The recent paper investigates the effect of vibration during the grinding process of the GH4169 nickel-based superalloy blade tip. Moreover, this paper proposes a theoretical model to link the unbalance of the grinding wheel, the vibration, and the surface topography characteristics of the blade. The results show that the blade vibration during grinding and the resulting non-linear change of the grinding depth could reduce the surface quality of the blade tip, and lead to differences in the surface quality of the blade tip in different areas, where the surface roughness in the entry area zone I is the largest, in the exit area zone III is the second largest, and the intermediate area zone III is the smallest. Grinding depth has a greater impact on the difference of the surface quality in the blade tip grinding process, especially when the grinding depth is greater than 4 μm, the difference of surface roughness increases significantly. On the other hand, the feed rate has little effect on the difference in surface quality. Adding damping block can reduce the surface roughness of the blade tip, however, it does not reduce the difference in surface quality.

Removing of the Dye Pollutant Acid Red 1 from Contaminated Waters by Electrocoagulation Method Using a Recirculating Tubular Reactor with Punched Anode

2019 ◽  
Vol 41 (1) ◽  
pp. 191-191
Author(s):  
Mohsen Garajehdaghi and Kambiz Seyyedi Mohsen Garajehdaghi and Kambiz Seyyedi
Keyword(s):  
Removal Efficiency ◽  
Flow Rate ◽  
Current Density ◽  
Electrolyte Concentration ◽  
Tubular Reactor ◽  
Electrolysis Time ◽  
Electrocoagulation Process ◽  
Acid Red 1 ◽  
Contaminated Waters

In the present study the removal of Acid red 1 (AR1), as a pollutant of contaminated waters, was investigated by the electrocoagulation method using a recirculating tubular reactor with punched anode. The role of the parameters affecting removal efficiency including current density, electrolysis time, electrolyte concentration and type, pH, the flow rate of the solution, and dye concentration was studied. Spectrophotometric results indicated that for 2500 ml of the dye solution containing 30 mg L-1 AR1 more than 95% of the dye was removed under the following conditions: current density of 1.3 mA cm-2, electrolysis time of 20 min, pH of 6, electrolyte dosage of 0/08 g L-1 , and the flow rate of 2 L min-1. Results showed that with an increase the electrolyte concentration and current density, color removal efficiency increases. Increasing of the flow rate of solution in the reactor due to decrease the retention time, decreases the removal efficiency. According to nature of electrocoagulation process, neutral range of pH is suitable for decolorization process.

Experimental Study of the Corner of Hardened Steel Mould in High Speed Milling with Micro-End Mill

2014 ◽  
Vol 800-801 ◽  
pp. 9-14
Author(s):  
Bang Xi Dong ◽  
Ying Ning Hu ◽  
Shan Shan Hu ◽  
Xi Huang
Keyword(s):  
Surface Roughness ◽  
Cutting Forces ◽  
High Speed ◽  
Great Influence ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Hardened Steel ◽  
Micro End Mill ◽  
Steel Mould

High speed machining of the corner of hardened steel mould has a great influence to the entire product performance of the mould. In this paper, with the single factor experiments, the influence of feed per tooth, cutting speed and angle of the corner to the cutting forces, the vibration value and the surface roughness were analyzed. And the cutting parameters were optimized. The cutting forces, vibration value and surface roughness value of the corner of the mould reached the minimum value when the cutting speed was 80 m/min and the feed per tooth was 0.006 mm/z in the experiment. The surface quality of corner with angle of 90o was better than the corner with angle of 60o and 120o with various milling parameters.

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