Determination of work load in field studies: evaluation and design of an inspection task. (Determination de la Charge de Travail sur le Terrain: Evaluation et Amenagment d'une Tache D'Inspection)

1975 ◽  
Vol 6 (3) ◽  
pp. 181
Keyword(s):  
Work Load ◽  
Field Studies ◽  
Charge De Travail ◽  
Inspection Task

Orientation of processes of biological nitrogen transformation in winter rye agroecosystems under different levels of fertilization background

2016 ◽  
Vol 3 (3) ◽  
pp. 28-34
Author(s):  
V. Volkogon ◽  
I. Korotka
Keyword(s):  
Root Zone ◽  
Field Studies ◽  
Nitrogen Transformation ◽  
Mineral Nitrogen ◽  
Nitrogen Fertilizers ◽  
Winter Rye ◽  
Podzolic Soils ◽  
Microbial Preparation ◽  
Biological Nitrogen

Aim. To determine physiologically expedient rates of mineral nitrogen in winter rye production on sod-podzol- ic soils based on the orientation of the processes of biological nitrogen transformation in the plants rhizosphere. Methods. Field studies, gas chromatography determination of potential nitrogen fi xation activity and potential emissions of N 2 O. Results. The results obtained have demonstrated that the rates of mineral nitrogen, not ex- ceeding 60 kg/ha, can be considered physiologically expedient for winter rye production on sod-podzolic soils. Under the application of microbial preparation Diazobakteryn, there is a higher physiological need of plants for nitrogen, which allows increasing the rates of nitrogen fertilizers up to 90 kg/ha. Conclusions. The orienta- tion of the processes of biological nitrogen transformation in the root zone of plants is a reliable indicator of determining the appropriateness of nitrogen fertilization of crops.

scholarly journals Field test of available methods to measure remotely SO<sub>x</sub> and NO<sub>x</sub> emissions from ships

2014 ◽  
Vol 7 (8) ◽  
pp. 2597-2613 ◽  
Author(s):  
J. M. Balzani Lööv ◽  
B. Alfoldy ◽  
L. F. L. Gast ◽  
J. Hjorth ◽  
F. Lagler ◽  
...  
Keyword(s):  
Field Studies ◽  
Emission Factors ◽  
Sulphur Content ◽  
Nox Emission ◽  
Optical Methods ◽  
Optical Absorption Spectroscopy ◽  
Open Sea ◽  
Remote Measurements ◽  
Convenient Technique

Abstract. Methods for the determination of ship fuel sulphur content and NOx emission factors based on remote measurements have been compared in the harbour of Rotterdam and compared to direct stack emission measurements on the ferry Stena Hollandica. The methods were selected based on a review of the available literature on ship emission measurements. They were either optical (LIDAR, Differential Optical Absorption Spectroscopy (DOAS), UV camera), combined with model-based estimates of fuel consumption, or based on the so called "sniffer" principle, where SO2 or NOx emission factors are determined from simultaneous measurement of the increase of CO2 and SO2 or NOx concentrations in the plume of the ship compared to the background. The measurements were performed from stations at land, from a boat and from a helicopter. Mobile measurement platforms were found to have important advantages compared to the land-based ones because they allow optimizing the sampling conditions and sampling from ships on the open sea. Although optical methods can provide reliable results it was found that at the state of the art level, the "sniffer" approach is the most convenient technique for determining both SO2 and NOx emission factors remotely. The average random error on the determination of SO2 emission factors comparing two identical instrumental set-ups was 6%. However, it was found that apparently minor differences in the instrumental characteristics, such as response time, could cause significant differences between the emission factors determined. Direct stack measurements showed that about 14% of the fuel sulphur content was not emitted as SO2. This was supported by the remote measurements and is in agreement with the results of other field studies.

scholarly journals Determination of the rockfall source in an urban settlement area by using a rule-based fuzzy evaluation

2006 ◽  
Vol 6 (6) ◽  
pp. 941-954 ◽  
Author(s):  
H. Aksoy ◽  
M. Ercanoglu
Keyword(s):  
Field Studies ◽  
Fuzzy Evaluation ◽  
Hazard Map ◽  
Initiation Mechanism ◽  
Urban Settlement ◽  
Rule Based ◽  
Rockfall Hazard ◽  
Source Areas ◽  
The City

Abstract. The evaluation of the rockfall initiation mechanism and the simulation of the runout behavior is an important issue in the prevention and remedial measures for potential rockfall hazards in highway protection, in forest preservation, and especially in urban settlement areas. In most of the studies in the literature, the extent of the rockfall hazard was determined by various techniques basing on the selection of a rockfall source, generally defined as zones of rock bodies having slope angles higher than a certain value, proposed by general practice. In the present study, it was aimed to carry out a rule-based fuzzy analysis on the discontinuity data of andesites in the city of Ankara, Turkey, in order to bring a different and rather systematic approach to determine the source areas for rockfall hazard in an urban settlement, based on the discontinuity and natural slope features. First, to obtain rock source areas (RSAs), data obtained from the field studies were combined with a rule-based fuzzy evaluation, incorporating the altitude difference, the number of discontinuities, the number of wedges and the number of potential slides as the parameters of the fuzzy sets. After processing the outputs of the rule-based fuzzy system and producing the linguistic definitions, it could be possible to obtain potential RSAs. According to the RSA maps, 1.7% of the study area was found to have "high RSA", and 5.8% of the study area was assigned as "medium RSA". Then, potential rockfall hazard map was prepared. At the final stage, based upon the high and medium RSAs, 3.6% of the study area showed "high rockfall potential", while areal distribution of "medium rockfall potential" was found as 7.9%. Both RSA and potential rockfall hazard map were in accordance with the observations performed in the field.

Adaptable Robots Based on Linkage Type Mechanisms for Pipeline Inspection Task

2015 ◽  
Vol 762 ◽  
pp. 163-168 ◽  
Author(s):  
Mihai Olimpiu Tătar ◽  
Ioan Ardelean ◽  
Dan Mândru
Keyword(s):  
Traction Force ◽  
Digital Measuring ◽  
Pipe Inspection ◽  
Measuring Device ◽  
Maintenance And Repair ◽  
Pipeline Inspection ◽  
Inspection Robot ◽  
Complete Inspection ◽  
Inspection Task

Inspection and exploration represent a challenging domain in the field of robotics because of the hazardous and limited workspace to which the robots have to adapt and because of the reduced ability to monitor and acquire data about the inspected environment. A pipeline inspection robot must ensure sufficient traction force to pull its tether cable and other equipment while travelling inside a pipeline to complete inspection, maintenance, and repair tasks. This paper presents the design of three minirobots with adaptable structure for in pipe inspection and the experimental determination of their traction force. To measure the traction force of the minirobots, the Xplorer GLX digital measuring device was used.

Computer-based system for analysis of respiratory responses to exercise

1977 ◽  
Vol 42 (6) ◽  
pp. 968-975 ◽  
Author(s):  
D. H. Pearce ◽  
H. T. Milhorn ◽  
G. H. Holloman ◽  
W. J. Reynolds
Keyword(s):  
Carbon Dioxide ◽  
Respiratory Exchange Ratio ◽  
Minute Ventilation ◽  
Type System ◽  
Work Load ◽  
Magnetic Type ◽  
Computer Based ◽  
End Tidal ◽  
Good Agreement

A computer-based system for the determination of tidal volume, respiratory frequency, minute ventilation, oxygen transfer, carbon dioxide transfer, respiratory exchange ratio, end-tidal oxygen, end-tidal carbon dioxide, and heart rate is presented. These variables are first determined on a breath-by-breath basis from data (expired carbon dioxide and oxygen fractions, airflow, and ECG) prerecorded on an FM magnetic type system. The breath-by-breath data are then averaged for each experimental run in 5-s increments. The 5-s increment data from a group of subjects can then be averaged and the SEM determined at prescribed periods of time. For the study of individual respiratory transient we found the 5-s increment data to be more useful than the breath-by-breath data because it has a lesser degree of fluctuation. The system is especially adapted to careful observation of the responses within the first few seconds of a change in work load. Appropriate computer programs are discussed. The results of several experiments are compared with data from other sources and found to be in good agreement.

Vulcameter Determination of Best Cure

1965 ◽  
Vol 38 (4) ◽  
pp. 757-768 ◽  
Author(s):  
S. D. Gehman ◽  
F. S. Maxey ◽  
S. R. Ogilby
Keyword(s):  
Rate Constant ◽  
Work Load ◽  
Service Performance ◽  
Stress Strain ◽  
First Order ◽  
Testing Laboratories ◽  
Physical Testing ◽  
Strain Testing ◽  
Minimum Number

Abstract Using a continuous cure curve to select a minimum number of stepped cures, it should be possible to vulcanize and test fewer sheets to determine best cure. This procedure is attractive for its potential of expediting the output of physical testing laboratories and especially for reducing the work load of stress-strain testing. Cure curves recorded with the Vulcameter approximated first-order reactions. Equations were derived to calculate the final force and rate constant from recorded force values without carrying the reaction to completion. A chart is suggested to assist in calculating the rate constant. Time for a given fractional rise in force depends only on the rate constant so that a chart for obtaining it is relatively simple. Experience and correlation with service performance in selecting best cures is emphasized. 95% rise times from Vulcameter curves were compared with conventionally selected best cures for a wide variety of compounds. Indications are that experience with the method might reduce the number of test-sheet cures to determine optimum stress-strain properties to one, two, or three depending upon the compound and the exactness required.

scholarly journals PENGARUH SUPERVISI KEPALA SEKOLAH TERHADAP KINERJA GURU DI SMP NEGERI 1 PARUNG KECAMATAN PARUNG KABUPATEN BOGOR

2017 ◽  
Vol 1 (1) ◽  
pp. 13
Author(s):  
Darmawati Darmawati ◽  
R. Akhmad Munjin ◽  
G. Goris Seran
Keyword(s):  
Teacher Performance ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
Field Studies ◽  
Significance Test ◽  
Average Score ◽  
Performance Variables ◽  
Key Word ◽  
Study Population

The research method was associative. The data collection techniques used was literature and field studies. The study population amounted to 47 respondents. The sampling technique used was simple random sampling. Determination of the sample used Yamane formula so the result sampling was 32 respondents. To determine the degree of correlation was used Pearson Product Moment Correlation. The results of research recapitulation variable supervision showed the average score of 3.2 which categorized medium and the recapitulation teacher performance variables obtained an average score 4.45 which categorized very good, the product moment correlation significance test for n = 32 , standard error of 5%, then the value of rtable=0.349. then   rcount  0.195 the count was less than rtable=0.349, so 0.195 was a significant correlation coefficient. The research conclusion showed that the influence of principal supervising toward teacher performance by 19.5% and the remaining 80.5% was determined other factors, such as the assessment of teachers by students, delivery of teaching material according to the students opinion, incentives, teacher certification.   Key word: Supervision, Performance, Teacher.

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