<title>Preliminary test results and upgrades for an automated assembly system</title>

The article presents results of the preliminary research of mechanical properties of flame-sprayed aluminum coatings reinforced with carbon materials made on the construction steel S235J0 substrate. For reinforcement the following carbon materials were used: carbon nanotubes Nanocyl NC 7000 (0.5 wt.% and 1 wt.%) and carburite (0.5 wt.%). The properties evaluation was made using metallographic macroscope and microscope, chemical composition, microhardness, abrasion and erosion resistance studies. The obtained results were compared with aluminum powder coatings (EN AW 1000 series). It was proved that the flame spraying of aluminum coatings reinforced with particles of carbonaceous materials can be an effective alternative for laser cladding technology. The preliminary test results will be successively extended by further experiments to contribute in the near future to develop innovative technologies, that can be implemented in the automotive industry for production of components with high strength, wear resistance, good thermal conductivity and low density, such as brake shoes, cylinder liners, piston rings and gears.

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Detection of Microaneurysms in Fundus Images Based on an Attention Mechanism

Genes ◽

10.3390/genes10100817 ◽

2019 ◽

Vol 10 (10) ◽

pp. 817

Author(s):

Lizong Zhang ◽

Shuxin Feng ◽

Guiduo Duan ◽

Ying Li ◽

Guisong Liu

Keyword(s):

Detection Method ◽

Preliminary Test ◽

Attention Mechanism ◽

Fundus Images ◽

Test Results ◽

Average Accuracy ◽

Multiple Feature ◽

Retinal Fundus Images ◽

Retinal Fundus

Microaneurysms (MAs) are the earliest detectable diabetic retinopathy (DR) lesions. Thus, the ability to automatically detect MAs is critical for the early diagnosis of DR. However, achieving the accurate and reliable detection of MAs remains a significant challenge due to the size and complexity of retinal fundus images. Therefore, this paper presents a novel MA detection method based on a deep neural network with a multilayer attention mechanism for retinal fundus images. First, a series of equalization operations are performed to improve the quality of the fundus images. Then, based on the attention mechanism, multiple feature layers with obvious target features are fused to achieve preliminary MA detection. Finally, the spatial relationships between MAs and blood vessels are utilized to perform a secondary screening of the preliminary test results to obtain the final MA detection results. We evaluated the method on the IDRiD_VOC dataset, which was collected from the open IDRiD dataset. The results show that our method effectively improves the average accuracy and sensitivity of MA detection.

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Investigating the pumping process of a resonance-vibrating pump for medium-depth boreholes

Research in Agricultural Engineering ◽

10.17221/1956-rae ◽

2008 ◽

Vol 53 (No. 4) ◽

pp. 172-181 ◽

Cited By ~ 2

Author(s):

I.A. Loukanov

Keyword(s):

Resonance Frequency ◽

Flow Rate ◽

Ground Level ◽

Preliminary Test ◽

Degree Of Freedom ◽

Pump Efficiency ◽

Test Results ◽

Resonance Vibrations ◽

Experimental Findings ◽

Mechanical Shaker

This paper deals with the pumping process of a resonance-vibrating pump, which utilizes the resonance vibrations of one degree-of-freedom oscillating system. The pump is powered by a mechanical shaker consisting of two counter rotating offset masses and operating in resonance. The study investigates the nature of the pumping process and conditions required to achieve pumping action. Equations for the flow rate, pressure developed at ground level or any height above it, the pump efficiency, and the power delivered by the shaker are derived. The analysis of the pumping process revealed that the flow rate of the pump may be maximized either by increasing the acceleration imparted on the oscillating system, and/or by reducing the resonance frequency. It was found that the pressure developed by the pump is independent of the depth of pumping, provided that the same acceleration is imparted, and its efficiency may be increased either by reducing the resonance frequency and/or by increasing the depth of pumping. The preliminary test results about the flow rate and pressure developed at ground level appeared to be close to the values predicted by the proposed theory. Based on the analysis of the theoretical and experimental findings it is concluded that the equations derived in this study may be employed in designing resonance vibrating pumps for a desirable flow rate, pressure, and efficiency in pumping water from a specified depth.

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Hubungan Paparan Timbal Dalam Darah dengan Kejadian Hipertensi Pada Pekerja Industri Pengecoran Logam Di Ceper Klaten Tahun 2015

JURNAL KESEHATAN LINGKUNGAN INDONESIA ◽

10.14710/jkli.14.2.35-39 ◽

2016 ◽

Vol 14 (2) ◽

pp. 35

Author(s):

Sigit Tri Ambarwanto ◽

Nurjazuli Nurjazuli ◽

Mursid Raharjo

Keyword(s):

Lead Level ◽

Blood Lead ◽

Preliminary Test ◽

The Body ◽

Test Results ◽

Chi Square ◽

Chi Square Test ◽

The Relationship ◽

Foundry Workers ◽

Gathering Data

Background: The problem of heavy metal pollution is a serious problem in Indonesia. This metal has been known to be stored in the body for long periods of time as toxins accumulate. Preliminary test results BLL on workers in the metal casting Ceper, found as many as 16 (5.61%) BLL on workers is under (NAB) and 17 (5.28%) workers above (NAB). The research was conducted to determine the relationship between the exposure of lead (Pb) in blood with hypertension in foundry workers CV. Fortification Jaya Batur, Ceper, Klaten. Methods: It was an observational study with Cross Secional design. The population in this study were all workers CV. Jaya fortification. Samples are workers CV. Fortification Jaya who met the inclusion criteria. Gathering data using questionnaires tools, inspection PB in the air using Gravimetry, Pb in the blood examination using AAS (automatic Absorption Spectrophotometer) and hypertension examination tension meter is measured using a needle. Results: The average air Pb 0.13756 mg / dl, the average BLL was 14.38096μg/dl. Chi Square test results showed that there was no relationship between the type of work with hypertension (p = 0.625), There is a relationship between levels of air Pb Pb levels in blood (p = 0.019), There is a relationship between levelsof lead in blood with hypertension(p=0.042).Conclusions:Levels of Air Pb Pb levels in the blood affects that can cause hypertension. Keywords: Hypertension, Blood Lead Level, Klaten

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