scholarly journals ANALISIS BEBAN KERJA OPERATOR DI BAGIAN PRODUKSI DENGAN METODE CARDIOVASCULAR LOAD (CVL) DAN BOURDON WIERSMA UNTUK MENGURANGI KELELAHAN DI CV. XYZ

2021 ◽  
Vol 16 (1) ◽  
pp. 59-70
Author(s):  
Enny Aryanny ◽  
Bayyinah Baitil
Keyword(s):  
Oxygen Consumption ◽  
Constant Level ◽  
Work Output ◽  
Workplace Conditions ◽  
Rest Periods ◽  
Accuracy Level ◽  
Speed Level ◽  
Work Shifts ◽  
Accuracy Speed

The workforce of plastic crushing and product printing at CV. XYZ experiences fatigue most quickly, so when working often makes mistakes and lacks concentration at work which causes a decrease in work output. The workload on the operator of the plastic crushing section has oxygen consumption of 0.953 liters / minute categorized by Weight, with a Cardiovascular Load percentage of 30.54% categorized as required for improvement based on the results of Bourdon Wiersma 10.4 seconds speed level category Good Enough, accuracy level 12.7 Doubtful category, a constant level of 5.7 seconds Fair category. The operator of the product printing section has an oxygen consumption of 1,083 liters / minute categorized by Weight, with a percentage of Cardiovascular Load of 35.71% categorized as needed an improvement based on the results of the Bourdon Wiersma speed level of 10.9 seconds the category Good Enough, the level of accuracy 17.6 Doubts category - Doubt, a constant level of 7.01 seconds in the Doubt-free category. Improvements that can be made to plastic crushing and product printing operators are adding rest periods, rolling workers' systems, improving workplace conditions to be more ergonomic, and managing work shifts..   Keywords: Oxygen Consumption, Accuracy, Speed, Constant.    

Myocardial anaerobic metabolism in intact dogs

1963 ◽  
Vol 204 (3) ◽  
pp. 427-432 ◽  
Author(s):  
William A. Neill ◽  
Norman Krasnow ◽  
Herbert J. Levine ◽  
Richard Gorlin
Keyword(s):  
Energy Source ◽  
Oxygen Consumption ◽  
Oxidative Metabolism ◽  
Anaerobic Metabolism ◽  
Muscle Metabolism ◽  
Mechanical Work ◽  
Work Output ◽  
Heart Work ◽  
Anaerobic Energy ◽  
The Difference

Energy liberated from substrates of heart muscle metabolism appears as mechanical work and heat. External mechanical work and heat production of the left ventricle were compared with its oxygen consumption in intact dogs. Under control conditions, within the range of accuracy possible, the sum of work and heat was equal to energy from oxidative metabolism. Intravascular administration of cyanide increased heart work but reduced its rate of aerobic metabolism. During the cyanide effect, work plus heat exceeded the energy available from oxidative metabolism. The difference represents myocardial anaerobic metabolism. Since the energy of mechanical work output alone was greater than the myocardial aerobic energy source, a portion of the anaerobic energy liberated must have been converted to mechanical work.

Discrepancy between heart rate and oxygen consumption during work in the warmth

1963 ◽  
Vol 18 (6) ◽  
pp. 1095-1098 ◽  
Author(s):  
Lucien Brouha ◽  
Mary E. Maxfield ◽  
Paul E. Smith ◽  
Gordon J. Stopps
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Steady State ◽  
Environmental Stress ◽  
Steady States ◽  
Repetitive Work ◽  
Average Value ◽  
Warm Environment ◽  
Rest Periods ◽  
Accumulated Strain

These experiments compare the usefulness of oxygen consumption and heart rate as indicators of the strain produced by repetitive work in various environments. When the length of the rest periods was determined by the time for oxygen consumption to return to its resting level, a steady state of heart rate and oxygen consumption was achieved in a comfortable environment. In warm surroundings, oxygen consumption reached again a steady state but the heart rate increased during repetitive work cycles. When the duration of the rest periods was arbitrarily fixed, both oxygen consumption and heart rate reached constant steady states in repeated work cycles when the environmental stress was light. When it was severe, oxygen consumption remained at the same average value from cycle to cycle and failed to indicate the presence of accumulated strain which was revealed by increasing heart rates. repetitive work; warm environment; female humans Submitted on July 13, 1961

Comparison of energy expenditure elevations after submaximal and supramaximal running

1997 ◽  
Vol 82 (2) ◽  
pp. 661-666 ◽  
Author(s):  
J. Laforgia ◽  
R. T. Withers ◽  
N. J. Shipp ◽  
C. J. Gore
Keyword(s):  
Oxygen Consumption ◽  
Energy Expenditure ◽  
Maximal Oxygen Consumption ◽  
Treadmill Running ◽  
Oxygen Cost ◽  
Distance Runners ◽  
Total Oxygen ◽  
Rest Periods ◽  
Excess Postexercise Oxygen Consumption ◽  
Continuous Running

Laforgia, J., R. T. Withers, N. J. Shipp, and C. J. Gore.Comparison of energy expenditure elevations after submaximal and supramaximal running. J. Appl. Physiol. 82(2): 661–666, 1997.—Although exercise intensity has been identified as a major determinant of the excess postexercise oxygen consumption (EPOC), no studies have compared the EPOC after submaximal continuous running and supramaximal interval running. Eight male middle-distance runners [age = 21.1 ± 3.1 (SD) yr; mass = 67.8 ± 5.1 kg; maximal oxygen consumption (V˙o 2 max) = 69.2 ± 4.0 ml ⋅ kg−1 ⋅ min−1] therefore completed two equated treatments of treadmill running (continuous running: 30 min at 70%V˙o 2 max; interval running: 20 × 1-min intervals at 105%V˙o 2 max with intervening 2-min rest periods) and a control session (no exercise) in a counterbalanced research design. The 9-h EPOC values were 6.9 ± 3.8 and 15.0 ± 3.3 liters ( t-test: P = 0.001) for the submaximal and supramaximal treatments, respectively. These values represent 7.1 and 13.8% of the net total oxygen cost of both treatments. Notwithstanding the higher EPOC for supramaximal interval running compared with submaximal continuous running, the major contribution of both to weight loss is therefore via the energy expended during the actual exercise.

scholarly journals TEMPERATURE CHARACTERISTICS FOR THE METABOLISM OF CHLORELLA

1934 ◽  
Vol 18 (2) ◽  
pp. 193-207 ◽  
Author(s):  
C. S. French ◽  
H. I. Kohn ◽  
P. S. Tang
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Consumption ◽  
Green Alga ◽  
Constant Temperature ◽  
Chlorella Pyrenoidosa ◽  
Carbon Dioxide Production ◽  
Constant Level ◽  
Temperature Characteristics ◽  
Green Alga Chlorella

The respiration of the green alga Chlorella pyrenoidosa, suspended in Knop's solution, has been studied in the dark as a function of time and of temperature. The rates of oxygen consumption and of carbon dioxide production (at constant temperature) decline for about 25 hours to a low, constant level. From an analysis of the curves it is suggested that two substances, A and B, are utilized, whose respiratory quotients are 1 and 0.65 respectively. The values of the temperature characteristics were found to be: for oxidation of A, 19,500 (0.6 to 11.5°C.) and 3,500 (11.5 to 28°C.); for oxidation of B, 5,600 (23.4 to 0.6°C.).

Short rest periods between work shifts predict sleep and health problems in nurses at 1-year follow-up

2014 ◽  
Vol 71 (8) ◽  
pp. 555-561 ◽  
Author(s):  
Elisabeth Flo ◽  
Ståle Pallesen ◽  
Bente Elisabeth Moen ◽  
Siri Waage ◽  
Bjørn Bjorvatn
Keyword(s):  
Health Problems ◽  
Rest Periods ◽  
Work Shifts

Rheometers, Bioreactors, and Vocalization Forces: Using Basic Science Investigations to Help the Voices of Teachers

2008 ◽  
Vol 18 (3) ◽  
pp. 119-125
Author(s):  
Sarah Klemuk
Keyword(s):  
Basic Science ◽  
Tissue Growth ◽  
University Of Iowa ◽  
Support Cell ◽  
Rest Periods ◽  
Collaborative Studies ◽  
Professional Voice Users ◽  
The University ◽  
Science Investigations ◽  
Professional Voice

Abstract Collaborative studies at the University of Iowa and the National Center for Voice and Speech aim to help the voices of teachers. Investigators study how cells and tissues respond to vibration doses simulating typical vocalization patterns of teachers. A commercially manufactured instrument is uniquely modified to support cell and tissue growth, to subject tissues to vocalization-like forces, and to measure viscoelastic properties of tissues. Through this basic science approach, steps toward safety limits for vocalization and habilitating rest periods for professional voice users will be achieved.

Detachment From Work in Airport Hotels

2012 ◽  
Vol 2 (1) ◽  
pp. 20-24 ◽  
Author(s):  
Ben J. Searle
Keyword(s):  
Home Base ◽  
Airline Pilots ◽  
Psychological Detachment ◽  
Rest Periods ◽  
Psychological Detachment From Work

The work of airline pilots is demanding and must be followed by rest periods (slips) so that pilots recover sufficiently well to keep flying safely. When slips occur away from home base, pilots are usually accommodated in a hotel. This paper reviews the phenomenon of psychological detachment from work (i.e., not thinking about work) and its implications for pilot accommodation and recovery. The review suggests that pilots accommodated in hotels located in or close to airports may be less able to psychologically detach from work during slips, with implications for recovery, fatigue, and ultimately safety. The paper presents a rationale for considering psychological detachment from work when evaluating the quality of hotels chosen for pilots.

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