Factors affecting the yield of industrial hemp - experimental results from France.

2013 ◽  
pp. 72-97 ◽  
Author(s):  
S. Legros ◽  
S. Picault ◽  
N. Cerruti
Keyword(s):  
Experimental Results ◽  
Factors Affecting ◽  
Industrial Hemp

scholarly journals Experimental investigation on shear properties of warp-knitted brush fabrics

2020 ◽  
Vol 15 ◽  
pp. 155892502094645
Author(s):  
Yao Chu ◽  
Haitao Lin ◽  
Hafsa Jamshaid ◽  
Qi Zhang ◽  
Pibo Ma
Keyword(s):  
Experimental Investigation ◽  
Shear Strength ◽  
Outer Surface ◽  
Shear Force ◽  
Shear Resistance ◽  
Experimental Results ◽  
Shear Properties ◽  
Factors Affecting ◽  
Car Seat ◽  
Seat Cushions

Warp-knitted brush fabrics are composed of an outer surface formed by weaving the front and rear needle beds with spacer yarns interposed between them. Warp-knitted brush fabrics can be used as a non-slip cover for car seat cushions; the adhesion between non-slip fabric and car seat is related to the shear strength of warp-knitted brush fabrics. In this article, to study the factors affecting the shear force of warp-knitted brush fabrics, three different processing methods and four different stretching speed intervals were used to find the effects of stiffeners and action of different speed intervals on shear properties of fabrics. The experimental results show that the stiffener treatment can improve the shear resistance of the warp-knitted brush fabrics, and the effect of different speed intervals can affect the shear resistance of fabrics. These findings will have a guiding significance in the design and production of warp-knitted brush fabrics applied to fabrics such as car seat cushions, and the results can also help to study the shear properties of warp-knitted brush fabrics for wider applications.

Some Anomalies in the Experimental Results of EDM

2011 ◽  
Vol 110-116 ◽  
pp. 4691-4696
Author(s):  
Gugulothu Bhiksha ◽  
K. Buschaiah
Keyword(s):  
High Frequency ◽  
Erosion Rate ◽  
Metal Removal ◽  
Orthogonal Arrays ◽  
Experimental Results ◽  
Experiment Planning ◽  
Factors Affecting ◽  
Electro Discharge Machining ◽  
Material Erosion ◽  
Spark Energy

In electro discharge machining (EDM) the metal removal occurs from the erosive effects of high frequency sparks. Consequently the erosion rate depends on spark energy sparking frequency and the factors affecting them. However the experimental results are highly randomandsometimes unexpected. Material erosion rate and surface roughness were analysed for the effect of important factors like pulse parameters (voltage current, ontime and offtime), polarity and work material. Taguchi method of experiment planning with orthogonal arrays was adopted to analyse the anomalies observed in the experimental results.

The Control of Dragline Spinning in the Garden Spider

1962 ◽  
Vol s3-103 (64) ◽  
pp. 557-571
Author(s):  
R. S. WILSON
Keyword(s):  
Control Valve ◽  
Experimental Results ◽  
Abdominal Pressure ◽  
Silk Thread ◽  
Smooth Control ◽  
Factors Affecting ◽  
Orb Web ◽  
Araneus Diadematus ◽  
Orb Web Spiders

A study of the tarsal claws, the spinning apparatus, and other factors affecting dragline spinning has been made using certain orb-web spiders, principally Araneus diadematus. The structure of the tarsal claws suggests that they are incapable of smoothly controlling the speed at which the silk thread is extracted, although they can grip and release the thread quickly. Evidence is presented that smooth control of spinning is achieved through the interaction of the intra-abdominal pressure and the control valve which lies in the silk duct. The intra-abdominal pressure is shown to be equivalent to from 3 to 4 cm of mercury, and to be responsible for moving the fluid silk out of the gland and up the duct. The experimental results also suggest that the control valve regulates the amount of fluid silk available for spinning as a thread and that it also acts as the functional spinning orifice, its aperture controlling the diameter of the thread spun.

Some factors affecting the evaporation of water from soil

1923 ◽  
Vol 13 (2) ◽  
pp. 121-143 ◽  
Author(s):  
E. A. Fisher
Keyword(s):  
Specific Gravity ◽  
Moisture Content ◽  
Experimental Results ◽  
Factors Affecting ◽  
The Real ◽  
Reasonable Degree ◽  
Two Factors ◽  
Rate Of Evaporation ◽  
Image Position

In1914 the result of a study of the evaporation of water from soil was published by B. A. Keen, who distinguished two factors governing the rate of evaporation. One factor was that the available surface from which evaporation takes place decreases as the moisture content decreases. Keen deduced an equation that expressed the operation of this factor, viz.in whichDis a constant,w= percentage of water by weight ands= the real specific gravity of the soil. He showed that this equation agreed with his experimental results with a reasonable degree of accuracy.

Research for an Automatic Measurement System for Centroidal Deviation of Projectiles Based on Three Points Method

2010 ◽  
Vol 26-28 ◽  
pp. 1-4
Author(s):  
Guo Nian Yao ◽  
Jun Hu Wei ◽  
Hao Sun ◽  
Guo Ji Sun
Keyword(s):  
Quantitative Analysis ◽  
Measurement System ◽  
Automatic Measurement ◽  
High Accuracy ◽  
Experimental Results ◽  
Factors Affecting ◽  
Automatic Measurement System ◽  
Working Principle ◽  
Main Factors ◽  
Relevant Calculation

In order to improve the measuring accuracy and efficiency of projectiles’ centroidal deviation, the working principle and the relevant calculation formulae based on three points method are described in detail, the main factors affecting precision are discussed and quantitative analysis on precision of the equipment is made. The measuring platform with automatic leveling and locating based on the arc locating and so on are put forward to reduce error. The experimental results show that the system can satisfy the requirement for measuring with high accuracy. The equipment plays a very important role in testing ordnance, especially for measuring regular projectiles.

Experimental Research on Machining Performance of Electrode Materials in Dry EDM

2006 ◽  
Vol 532-533 ◽  
pp. 173-176 ◽  
Author(s):  
Li Qing Li ◽  
Zhen Long Wang ◽  
Yong Feng Guo ◽  
Ji Cheng Bai
Keyword(s):  
Electrical Discharge ◽  
Electrode Materials ◽  
Electrical Discharge Machining ◽  
Tool Material ◽  
Experimental Results ◽  
Pulse Interval ◽  
Machining Performance ◽  
Factors Affecting ◽  
Tool Materials ◽  
Dry Edm

Electrode materials are important factors affecting machining performances (MP) of electrical discharge machining (EDM). Experiments using different electrode materials were carried out in compressed air aim to realize MP of electrical discharge machining in gas (dry EDM). Experimental results show that a minimum pulse interval exists for given parameters and tool material. Calorific performances of tool materials are main influencing factors of MP on the condition of thorough deionization. Copper achieves the best MP in the experimental tool materials. Experimental results of different workpiece materials depict that material remove rate (MRR) and surface roughness (SR) value increase with increases of discharge energy. SKD61 steel achieves the highest MRR and SR value in the experimental materials. Material holding better performance of heat resistant, such as titanium alloy (TC4), achieves the lowest MRR.

scholarly journals Study on the Optimization of Double Parameters of the Air Flow Resistance and the Permeability of Electrospun Nanofiber Nonwovens

2019 ◽  
pp. 1-12
Author(s):  
Ying Chen ◽  
Yong Liu ◽  
Lu Qi ◽  
Lei Zhang ◽  
Qinwei Fan ◽  
...  
Keyword(s):  
Neural Network ◽  
Flow Resistance ◽  
Orthogonal Experiment ◽  
Air Flow ◽  
Experimental Results ◽  
Electrospun Nanofiber ◽  
Factors Affecting ◽  
Optimization Function ◽  
Major Factors ◽  
Parameter Values

In this paper, neural network is used as the tool to study the factors affecting the air flow resistance and the permeability of electrospun nanofiber nonwovens and analyze the major factors affecting the air flow resistance and the permeability such as concentration, distance, voltage and solution filling speed. First, design a five-level orthogonal table for all factors in accordance with the orthogonal experiment theory, select the corresponding parameter values, use polyvinyl alcohol (PVA) to prepare 50 samples on DXES-01 automatic electrostatic spinning machine, train them with neural network model and obtain the precise fitting function. The optimization function is constructed by the idea of two- objective optimization, and its three relative optimal values are calculated, 8.135611, 8.134624, 8.115814. Compared with the experimental results, the average relative error is 12.89 and 8.34. The experimental results show that the error is also ideal.

scholarly journals Experiment and numerical modelling of heat transfer inside calcium aluminate cement-based refractory concrete

2020 ◽  
Vol 61 (HTCS6) ◽  
pp. 139-147
Author(s):  
Tien Manh Tran ◽  
Hong Xuan Vu ◽  
Emmanuel Ferrier ◽  
Keyword(s):  
Heat Transfer ◽  
Thermal Properties ◽  
Calcium Aluminate ◽  
Refractory Concrete ◽  
Concrete Specimen ◽  
Calcium Aluminate Cement ◽  
Experimental Results ◽  
Factors Affecting ◽  
The Impact ◽  
Aluminate Cement

In the case of fire in infrastructure works, the bearing capacity of reinforced-concrete structures will be reduced due to the effect of high temperatures. So, the refractory concrete with good thermal properties contributes an important role in reducing the impact of fire on the durability of the building. Nowadays, calcium aluminate cement is widely used for that thanks to the thermal stability of the respective concrete by the high content of aluminum. This paper presents experimental and numerical results of heat transfer in cylindrical specimens of calcium aluminate cement-based refractory concrete. As experimental results, with a calcium aluminate content of about 50% in concrete, its thermal properties have been significantly improved in comparison with other types of cementitious concrete. The evolution of temperature as a function of time (inside and outside of the concrete specimen) was also recorded and analyzed. In the 3-D model, the thermal properties of refractory concrete were used from the previous experimental results. The results of this model were used to compare with experiments, then analyze and evaluate factors affecting the model results. The numerical model could also be exploited to determine the thermal parameters in the heat transfer in refractory concrete specimen.

scholarly journals Factors Affecting the Production of Poly Methyl Galacturonase Enzyme by Sclerotium rolfsii Sacc

2015 ◽  
Vol 3 (1) ◽  
pp. 89-95
Author(s):  
Shridha Chaurasia ◽  
Amit Kumar Chaurasia ◽  
Subha Chaurasia ◽  
Sushmita Chaurasia
Keyword(s):  
Incubation Period ◽  
Culture Media ◽  
Sclerotium Rolfsii ◽  
Culture Conditions ◽  
Experimental Results ◽  
Factors Affecting ◽  
Maximum Production ◽  
Wide Range

The aim of this work was to investigate the effects of different culture conditions on the production of poly methyl galacturonase enzyme bySclerotium rolfsii and their optimization. Activity of poly methyl galacturonase enzyme was assayed by viscometric method. Culture conditionslike culture media, incubation period, temperature and pH greatly influenced the production of poly methyl galacturonase enzyme. Out of tenculture media, only six media were proved to be producer of poly methyl galacturonase enzyme. Amongst them, Elliot’s medium was foundto be the best for the maximum production of poly methyl galacturonase enzyme. Analyzing the different incubation period, the production ofpoly methyl galacturonase enzyme was found rapid (3 days incubation) in Sclerotium rolfsii. Whereas, production of poly methyl galacturonaseenzyme, gradually increased with increasing the length of incubation period up to 18 days and further increase in length of incubation up to 10days, did not show any effect on the production of poly methyl galacturonase. The nine days incubation has found to be the best incubationperiod for the maximum production of poly methyl galacturonase enzyme. The Sclerotium rolfsii was also able to produce the poly methylgalacturonase enzyme at wide range of temperatures (from 15ºC to 35ºC), but 30ºC temperature was found to be the best suitable for themaximum production of poly methyl galacturonase enzyme. Among the wide range of pH tested (pH 3.0 to 9.0), the pH 5.0 was proved to bethe best for the maximum production of poly methyl galacturonase enzyme in Sclerotium rolfsii when it was cultured in the same medium. Onthe basis of overall experimental results it could be concluded that Sclerotium rolfsii has potential to produce poly methyl galacturonase enzymeconstitutively.DOI: http://dx.doi.org/10.3126/ijasbt.v3i1.12200     Int J Appl Sci Biotechnol, Vol. 3(1): 89-95   

scholarly journals Study of contact plates recovery from pharmaceutical cleanroom surfaces across three-time ranges

2020 ◽  
Author(s):  
Tim Sandle
Keyword(s):  
Staphylococcus Aureus ◽  
Stainless Steel ◽  
Environmental Monitoring ◽  
Sampling Method ◽  
Sampling Time ◽  
Experimental Results ◽  
Monitoring Methods ◽  
Microbial Adhesion ◽  
Factors Affecting ◽  
Contact Plate

Viable environmental monitoring methods remain primarily culture based. One example is with the contact plate. While the method is long-established, there remain aspects that are under-researched in relation to sampling. Factors affecting surface recovery relate to microbial adhesion, the type of surface, the sampling method and the time and pressure applied. This paper examines the effect of time, when a consistent pressure is applied, in relation to microbial recovery (for the organism Staphylococcus aureus) from two surfaces common to pharmaceutical facilities: stainless-steel and vinyl. The experimental results show that surface recovery was superior for vinyl compared with stainless-steel. For both surface types, a 20 second sampling time was shown to lead to a better recovery compared to a ten second sampling time (with a 30 second sampling time not leading to a significant improvement to the microbial surface recovery).

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