scholarly journals Integrated Design and Evaluation of a Soil-Covering and Film-Mulching Device for Sugarcane Transverse Planters

Agronomy ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1382
Author(s):  
Ke Li ◽  
Shizeng Li ◽  
Xiao Teng ◽  
Zhanglin Deng ◽  
Wenbo Huang ◽  
...  
Keyword(s):  
Optimal Parameter ◽  
Integrated Design ◽  
Field Tests ◽  
Factors Affecting ◽  
Disk Diameter ◽  
Average Value ◽  
Test Parameters ◽  
Breakage Rate ◽  
Film Mulching ◽  
Dip Angle

To solve the problem that the covering device of sugarcane cannot be adequate for the agronomic standards of seed cane setts planting, a soil-covering and film-mulching device for sugarcane transverse planting was designed. The device includes a soil-covering part, soil-compacting part, and film-mulching part. Through theoretical analysis of key components, the factors affecting the cane seed covering quality for the device were obtained. A quadratic orthogonal rotation regression test was conducted by a homemade prototype to explore the effects of disk diameter, central distance, disk depth in soil, and dip angle on soil covering thickness. The results showed that the above factors all have an extremely significant effect on the soil covering thickness, and the effect degree of each factor from high to low is central distance, disk depth in soil, dip angle, and disk diameter within the range of test parameters. The optimal parameter combination, with the disk diameter, the dip angle, the central distance, the disk depth in soil, and the diameter of the soil-compacting wheel being 304.7 mm, 55.1°, 386.5 mm, 32.4 mm, and 300 mm, respectively, was obtained by Design-Expert software and verified by comprehensive field tests. The results showed that the covering thickness is in the range of 94–111 mm, the average value is 102.6 mm, and the breakage rate is no more than 2.6%. The emergence rate is 86.4%, which is an improvement of 9.3% over that of a traditional covering device. The results suggested that the device can conform to the agricultural covering standard of sugarcane planting and provide a design basis for the application and popularization of the soil-covering and film-mulching device.

Analysis of TBM Tunnel Behavior in Jointed Rock Mass

2011 ◽  
Vol 90-93 ◽  
pp. 2033-2036 ◽  
Author(s):  
Jin Shan Sun ◽  
Hong Jun Guo ◽  
Wen Bo Lu ◽  
Qing Hui Jiang
Keyword(s):  
Rock Mass ◽  
Numerical Models ◽  
Jointed Rock ◽  
In Situ Stress ◽  
Jointed Rock Mass ◽  
Joint Orientation ◽  
Joint Spacing ◽  
Factors Affecting ◽  
Dip Angle

The factors affecting the TBM tunnel behavior in jointed rock mass is investigated. In the numerical models the concrete segment lining of TBM tunnel is concerned, which is simulated as a tube neglecting the segment joint. And the TBM tunnel construction process is simulate considering the excavation and installing of the segment linings. Some cases are analyzed with different joint orientation, joint spacing, joint strength and tunnel depth. The results show that the shape and areas of loosing zones of the tunnel are influenced by the parameters of joint sets and in-situ stress significantly, such as dip angle, spacing, strength, and the in-situ stress statement. And the stress and deformation of the tunnel lining are influenced by the parameters of joint sets and in-situ stress, too.

Field Tests of Guide Vanes and Runner Blades of a Large Bulb Turbine for Output Deficiency Diagnosis

2012 ◽  
Vol 212-213 ◽  
pp. 1057-1061 ◽  
Author(s):  
Zhong Liu ◽  
Zhu Qing Huang ◽  
Shu Yun Zou ◽  
Hong De Rao
Keyword(s):  
Field Tests ◽  
Economic Loss ◽  
Hydropower Plant ◽  
Test Results ◽  
Guide Vanes ◽  
Factors Affecting ◽  
Runner Blade ◽  
Main Factors ◽  
Theoretical Analyses ◽  
Bulb Turbine

The 3# bulb turbine in Hongjiang Hydropower Plant has faced the problem of output deficiency since its commission in Sept. 2003, which caused a large economic loss. Following simple theoretical analyses on the main factors affecting the turbine’s output and efficiency, the field test schemes were determined to measure the shapes and intervals of guide vanes and runner blades of the 3#, 5# and 6# turbines. The test results discover that the average blade intervals of the 3# turbine are generally less than those of the 5# one. Suggestions on runner blade installation adjustment and combined curve modification are given.

scholarly journals Comparison of three measurement methods of saturated hydraulic condutivity

2006 ◽  
Vol 3 (3) ◽  
pp. 987-1019 ◽  
Author(s):  
C. Fallico ◽  
E. Migliari ◽  
S. Troisi
Keyword(s):  
Hydraulic Conductivity ◽  
Measurement Method ◽  
Sandy Loam ◽  
Measurement Methods ◽  
Soil Core ◽  
Statistical Parameters ◽  
Factors Affecting ◽  
Average Value ◽  
Constant Head ◽  
Log Normal

Abstract. After pointing out the importance of the saturated hydraulic conductivity (ks) measurements and the difficulties and uncertainties that are present, and after recalling salient aspects of three well-known measurement methods of this parameter (i.e. constant-head tension infiltrometer (TI) method, constant-head pressure infiltrometer (PI) method and soil core (SC) estimates method), the results of an investigation on data which were obtained during a measurement campaign on an area of 800 m2, on a sandy loam hillslope, located in Southern Italy, were carried out again here. Three sets of values of ks, obtained with these measurement methods, were analyzed statistically, verifying that the log-normal distribution describes these better than the normal one; moreover, the more significant statistical parameters of each set were compared (average value , amplitude A, coefficient of variation CV and standard deviation SD), individualizing the more significant differences. The greatest value of hydraulic conductivity was found with method (PI), while the smallest with (SC) and the intermediate with (TI); these differences were translated into macroporosity and into the influence of the single measurement method. Moreover, referring to the possible factors affecting the results, the importance can be noted of the structure, the texture and the soil events, in terms of utilization, which can affect the measure of ks leading often to very different values even for similar soils, but with a different history, independently of the coincidence of the measurement points and they can be determining to explain the differences affecting the results obtained in analogous investigations by other researchers. Having confirmed that generalization is not possible, the need was emphasized to adopt the necessary devices relating to the specific measurement method, case by case, and to carefully explain the obtained results, in the light of the peculiarities and the limits of each situation. Finally, the results of similar statistical analysis carried out on a greater number of ks values, measured through the (TI) and (PI) methods are shown in this paper, with some statistical considerations on the increasing of the measurements number.

scholarly journals The small strain stiffness from bender elements tests for clayey soils

2018 ◽  
Vol 50 (4) ◽  
pp. 353-371
Author(s):  
Katarzyna Markowska-Lech ◽  
Wojciech Sas ◽  
Mariusz Lech ◽  
Katarzyna Gabryś ◽  
Alojzy Szymański
Keyword(s):  
Field Tests ◽  
Small Strain ◽  
Test Results ◽  
Bender Elements ◽  
Element Analysis ◽  
Factors Affecting ◽  
Small Strain Stiffness ◽  
Seismic Wave Velocities ◽  
Case Basis ◽  
Hardening Soil Model

Abstract The shear modulus of soils at small strain (G0) is one of the input parameters in a finite element analysis with the hardening soil model with small strain stiffness, required in the advanced numerical analyses of geotechnical engineering problems. The small strain stiffness can be determined based on the seismic wave velocities measured in the laboratory and field tests, but the interpretation of test results is still under discussion because of many different factors affecting the measurements of the wave travel time. The recommendations and proposed solutions found in the literature are helpful as a guide, but ought to be adopted with a certain measure of care and caution on a case-by-case basis. The equipment, procedures, tests results and interpretation analyses of bender elements (BE) tests performed on natural overconsolidated cohesive soils are presented.

scholarly journals Natural Productivity, Morphometrics and Seasonal Distribution of Caulerva Racemosa

2021 ◽  
Vol 324 ◽  
pp. 03010
Author(s):  
Tengku Said Raza’i ◽  
Viktor Amrifo ◽  
Imam Pangestiansyah Putra ◽  
Try Febrianto ◽  
Aidil Fadhli Ilhamdy
Keyword(s):  
Seasonal Changes ◽  
Growth Parameters ◽  
Water Dynamics ◽  
Percentage Cover ◽  
Food Ingredients ◽  
Factors Affecting ◽  
Average Value ◽  
Stolon Length ◽  
Different Seasons ◽  
Natural Productivity

Caulerva racemosa seaweed is a superior commodity with both ecological and socio-economical benefits. It is technologically developed into different products which include antioxidants, antibiotics, medicinal ingredients, cosmetics as well as other organic products and also used conventionally as food ingredients for human’s consumption. Meanwhile, the presence of C. racemosa is observed to decrease as the exploitation rate is one of the factors affecting its stock in the nature. Changes in environmental conditions contribute majorly to its availability in aquatic ecosystems. Furthermore, natural factors in the form of seasonal changes that cause fluctuations in water dynamics are the main focus affecting its lifespan. The results showed that C. racemosa growth parameters, which include percentage cover, productivity, together with morphometrics, failed to be significantly affected by seasonal changes. Meanwhile, the highest percentage cover was found during the northern monsoon, which has an average value of 37.99 ± 7.67 (Average±STDEV), while the lowest was during the eastern monsoons with 28.03 ± 9.09 respectively. The best morphometric size was during the northern monsoon with a tallus dimension of 0.25 with an average of 0.201 ± 0.03 and length of 0.825 ± 0.16, a stolon length of 2.09 with an average of 1.95 ± 0.08, 9 stolon grains with an average of 8 ± 0.2. However, the grain diameter, as well as the biomass, was 0.85 gr and 0.054 gr with an average of 0.825 ± 0.22 gr and the grain biomass was with an average of 0.040 ± 0.01 and 0.041 gr with the best average stolon was 0.031 ± 0.01 g in the western season. The results showed that C. racemosa, which grows up in different seasons, having its highest productivity during the northern season and the lowest one was during the eastern season with an average value of 0.439 ± 0.36 kg/m2 as well as 0.326 ± 0.37 Kg/m2, respectively

scholarly journals The Impact of GAP-SOP on The Production and Technical Efficiency of Garlic in Temanggung Regency

Agro Ekonomi ◽  
2019 ◽  
Vol 29 (2) ◽  
pp. 299
Author(s):  
Aristiyana Nur Tri Wardani ◽  
Dwidjono Hadi Darwanto
Keyword(s):  
Technical Efficiency ◽  
Sample Selection ◽  
Participation Rate ◽  
Simple Random Sampling ◽  
Technical Inefficiency ◽  
Factors Affecting ◽  
Average Value ◽  
Central Java ◽  
Efficient Level ◽  
The Impact

Temanggung regency is the largest garlic producer region in Central Java Province. However, its productivity is still low compared to the other regencies since garlic farmers have not achieved technical efficiency and limitary garlic farming technology.  Hence, it is necessary to investigate whether the input application in the process of garlic production has been at technically efficient level or not. This research aims to determine factors affecting garlic production, the level of technical efficiency and technical inefficiency of garlic farming in Temanggung Regency. The location of the research was determined by using purposive sampling. The sample selection used simple random sampling method with  60 garlic farmers as the respondent. The result shows that production factors such as land area, garlic seed, ZK fertilizer, pesticide and the level of application of garlic GAP-SOP have significant effect on garlic production. The average value of farmer’s technical efficiency is 0,811. It means that respondents in this study have been technically efficient. The socio-economic factors affecting technical inefficiency are the age, the number of worker in a family, the level of education and participation rate within farmer group. The improvement effort of technical efficiency of garlic farming can be done by optimizing the contribution of farmer group as a facility to access information. Therefore, it is able to improve the skills and knowledge of farmers to farm garlic.

scholarly journals PENGEMBANGAN INSTRUMEN PENILAIAN ASPEK PSIKOMOTORIK PADA PRAKTIKUM FAKTOR-FAKTOR YANG MEMPENGARUHI LAJU REAKSI KELAS XI IPA SMA NEGERI 3 PONTIANAK

2018 ◽  
Vol 6 (2) ◽  
Author(s):  
Septian Triadi Syahputra
Keyword(s):  
Reaction Rate ◽  
Field Trials ◽  
Assessment Instrument ◽  
Assessment Instruments ◽  
Main Field ◽  
Initial Field ◽  
Factors Affecting ◽  
Average Value ◽  
Rate Of Reaction ◽  
Very High

The aim of this study was to develop the psychomotor assessment instruments on experiment of factors that influence the rate of reaction which is feasible to be used. The development model used in this research was the modification model of 4P development into 3P which is recommended by Thiagarajan that is defining, designing and developing. Data collection techniques used were structured observation and questionnaire. The research instruments used were observation sheet and questionnaire. Initial field trials conducted on six students of class XII IPA 1, involving four observers while the main field trial conducted on 36 students of class XI IPA 1. The researcher involved four observers and one chemistry teacher. The feasibility of the developed psychomotor aspects assessment instrument is based on validity and practical aspects. The results obtained in this study were: (1) the average value of the validity of the psychomotor aspects assessment instrument was 1.00 with very high criteria and (2) the practicality of the psychomotor aspects assessment instrument based on the observers' response of 94.44 with very high criteria and teachers' response 90.27 with very high criteria. Based on the validity and practicality of the psychomotor aspect appraisal instrument the factors affecting the reaction rate are feasible to use

scholarly journals Health literacy levels and related factors of patients admitted to an outpatient clinic in Malatya

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
E Pehlivan ◽  
K Ozdemir
Keyword(s):  
Health Literacy ◽  
Outpatient Clinic ◽  
Educational Background ◽  
Cross Sectional Study ◽  
Related Factor ◽  
Related Factors ◽  
Cross Sectional ◽  
Factors Affecting ◽  
Average Value ◽  
Health Literacy Level

Abstract Background This study was conducted to determine the health literacy levels and related factors of the patients who applied to a health unit. Methods The population of this cross-sectional study was the patients who applied to a district outpatient clinic in the center of Malatya. Power 80% and in the 95% confidence interval based on the mean of health literacy scale of Turkey (29.5 ± 5.7) the sample size was determined as 317. In the first three months of 2019 outpatients and 384 randomized patients who agreed to participate in the study, developed by the Ministry of Health Literacy Turkey Health Questionnaire-32 (THLQ) was applied. The score obtained from the scale is considered to be insufficient of 25 and below, limited to > 25-33 points and a score of < 33 and above is sufficient. In the analysis of the data, Kolmogorov Smirnov, Mann Whitney U, Kruskal Wallis and Chi-Kare tests were used and p < 0.05 was chosen as the level of error. Results 49.9% of the participants were male and 50.1% were female. The average age is 35.94 ± 13.8. While 24% of the participants have secondary or lower education, 40.6% are graduates of higher education. In this study,the health literacy scale mean score of the participants is 15.85 ± 11.07. According to the results of THLQ-32, 78.1% of the participants were in the “insufficient” health literacy category, 14.0% in the “limited” category, only 7.9% in the “sufficient” category. Gender, age, educational background, frequency of applying to the health institution were determined as factors affecting the level of health literacy (p < 0.05). However, the presence of a disease causing regular drug use was not identified as a related factor (p > 0.05). Conclusions In this study, although of have a high education level of the participants were found to be inadequate of health literacy levels according to Turkey average value reflects the general. Key messages According to these results, it may be difficult for the groups that are insufficient in terms of health literacy to benefit from health services. Raising the health literacy level of the society can be an important component of health promotion.

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