scholarly journals Standardization of complementary work time in timber harvesting processes

2020 ◽  
Vol 62 (4) ◽  
pp. 258-269
Author(s):  
Krzysztof Kamiński ◽  
Grzegorz Szewczyk ◽  
Janusz Kocel
Keyword(s):  
Accurate Determination ◽  
Timber Harvesting ◽  
Time Structure ◽  
Working Environment ◽  
Work Time ◽  
Work Shift ◽  
Machine Technology ◽  
Working Day ◽  
Technology Level ◽  
The Impact

AbstractOne of the essential elements of work technology assessment is task performance time. In the working day structure, production times are crucial; however, under certain conditions, complementary work times can have a share of up to 30%. Accurate determination of the time structure of a work shift is very time consuming and requires time measurements using the methods of cumulative timing or snapshot observations. For this reason, the overall share of complementary work times in a work shift is usually estimated roughly, equally for all timber harvesting conditions. The aim of this study was to determine the impact of selected working environment factors on the share of complementary work times in a work shift, in technologies on the manual-machine and the machine levels. The analyses were carried out in 33 forest districts of the Regional Directorate of State Forests in Wrocław. Among forest contractors, surveys were carried out to analyse the time structure of a working day. For each forest district, analyses of environmental factors potentially relevant to the share of complementary work times in a work shift were carried out; these included field features, dispersion of stands, features of timber, area accessibility. The total share of complementary work times in the machine-level technology variant amounted to approx. 40% and was higher than the manual-machine technological variant, where this share amounted to approx. 35%. The models developed for standardization of the share of variability of complementary work times, in the case of the manual-machine technology level, took into account the share of timber assortments with the length of over 2.5 m as well as the share of upland and mountain sites. In the case of timber harvesting at the machine technology level, the standardization model included as significant the factors such as the share of coniferous forest sites, the number of forest complexes with an area of over 100 hectares, and the total length of roads. Therefore, the above features could be selected as decisive for the share of the complementary work time category out of the full set of environmental variables taken into consideration in the estimation of the time-consumption of timber harvesting processes.

scholarly journals Separating the impact of work environment and machine operation on harvester performance

2020 ◽  
Vol 139 (6) ◽  
pp. 1029-1043 ◽  
Author(s):  
Lari Melander ◽  
Risto Ritala
Keyword(s):  
Fuel Consumption ◽  
Forest Inventory ◽  
Timber Harvesting ◽  
Working Environment ◽  
Inventory Data ◽  
Forest Inventory Data ◽  
The North ◽  
Computational Resources ◽  
The Impact ◽  
General Tree

Abstract In mechanized logging operations, interactions between the forest machines and their operators, forest resources and environmental conditions are multifold and not easily detected. However, increased computational resources and sensing capabilities of the forest machines together with extensive forest inventory data enable modeling of such relationships, leading eventually to better planning of the operations, better assistance for the forest machine operators, and increased efficiency of timber harvesting. In this study, both forest machine fieldbus data and forest inventory data were acquired extensively. The forest inventory data, acquired nationwide, was clustered to categorize general tree and soil types in Finland. The found forest categories were applied when the harvester fieldbus data, collected from the forest operations in the North Karelia region with two similar harvesters, was analyzed. When the performance of the machine and the operator, namely the fuel consumption and log production, is studied individually for each forest cluster, the impact of working environment no longer masks the causes based on the machine or the operator, thus making the observations from separate forest locations comparable. The study observed statistically significant differences in fuel consumption between the most general tree and soil clusters as well as between the harvester-operator units. The modeling approach applied, based on multivariate linear regression, finds such reasons for the differences that have clear interpretation from machine setup or operator working style perspective, and thus offers a feasible method for assisting the operators in improving their working practices and thus the overall performance specifically at forest of given type.

scholarly journals The impact of the labor process severity on the formation of health disorders of protected ground grower

2021 ◽  
Vol 100 (6) ◽  
pp. 598-604
Author(s):  
Anna G. Migacheva ◽  
Tamara A. Novikova ◽  
Vladimmir F. Spirin
Keyword(s):  
Functional State ◽  
Work Experience ◽  
Working Environment ◽  
Labor Process ◽  
Cardiorespiratory System ◽  
Work Shift ◽  
Functional Changes ◽  
Adaptive Capabilities ◽  
Health Disorders ◽  
The Impact

Introduction. The severity of the labor process is one of the leading harmful factors of working conditions in greenhouse vegetable growing. Nevertheless, its influence on the formation of health disorders of vegetable growers has not been sufficiently studied. Material and methods. Physiological, hygienic and epidemiological studies were carried out, which included an assessment of the severity of work in the annual cycle, also the functional state of the cardiorespiratory system and the neuromuscular system in the dynamics of the work shift, the general morbidity of vegetable growers according to registration forms No. 025/y. Results. During the labor activity, vegetable growers were established to be exposed to physical overloads caused by the severity of the labor process (classes 3.2, 3.3) in combination with a heating microclimate (classes 3.1-3.3). By the end of the work shift, there was an increase relative to the initial levels of heart rate (p<0.05), a decrease in systolic and diastolic blood pressure, a reduction of maximum muscle strength (by 3.76-5.28%), and endurance of the muscles of the hands (by 18.5-33.15%). This indicated a decrease in working capacity and an increase in fatigue. A reduction in the Skibinski index (by 21.7%) and an increase in the index of resistance to hypoxia (by 38.9%) indicated a decrease in the body’s reserves of oxygen. Increased working levels of the index of functional changes testify about the tension of adaptation mechanisms and insufficient restoration of the body’s resources by the beginning of the shift. A decrease in the body’s physical condition and adaptive capabilities with an increase in professional experience was revealed (p<0.05). There were established statistically significant direct correlations between the prevalence of diseases of the circulatory system (r=0.6), musculoskeletal system, and connective tissue (r=0.35) with work experience in the profession (p<0.05). Conclusion. The revealed violations of the functional state and health of female vegetable growers result from the influence of physical overload in a heating microclimate. The priority measures for the prevention of health disorders of vegetable growers are to reduce physical overload and thermal effects of the working environment.

scholarly journals Effectiveness and Injury Risk during Timber Forwarding with a Quad Bike in Early Thinning

Forests ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1626
Author(s):  
Arkadiusz Stańczykiewicz ◽  
Dariusz Kulak ◽  
Krzysztof Leszczyński ◽  
Grzegorz Szewczyk ◽  
Paweł Kozicki
Keyword(s):  
Injury Risk ◽  
Average Distance ◽  
Work Productivity ◽  
Theoretical Work ◽  
Timber Harvesting ◽  
Time Structure ◽  
Labor Costs ◽  
Work Time ◽  
Hydraulic Crane ◽  
Loading And Unloading

Within the majority of forest areas where timber is harvested for industrial and energy purposes, working technologies using highly efficient multi-operational machinery and equipment are employed. The situation is different in fragmented, privately owned forests. In such forests, timber harvesting is mainly based on motor-manual technologies with a high proportion of manual labor, both at the stage of felling and timber processing and at the stage of its transport. The study aimed to characterize the work time structure of the ATV unit driver and his helper, to determine the productivity of this team, and to estimate the risk of injury during manual loading and unloading. Based on the data collected during the field research, the theoretical work time structure, work productivity and costs, and injury risk were estimated as a result of using a professional small trailer equipped with a hydraulic crane for timber forwarding, designed for aggregation with the ATV. The average, calculated productivity of timber forwarding (over an average distance of about 500 m) with manual loading and unloading was almost twice as low as the estimated average productivity of forwarding with mechanical loading and unloading using a hydraulic crane. The total unit costs (including labor costs) of forwarding with manual loading and unloading were almost threefold higher than those of forwarding using a trailer with a hydraulic crane. The use of small forest trailers equipped with a hydraulic crane not only ensures higher productivity and cost effectiveness but also allows reducing (even by several percent) the inconvenience of manual timber handling and the risk of strain of the musculoskeletal system.

Antecedents And Outcomes Of Qwl Among Employees In Banks

2019 ◽  
Vol 118 (7) ◽  
pp. 1-19
Author(s):  
Geethanjali N ◽  
Parveen Roja M ◽  
Lavanya D
Keyword(s):  
Organizational Climate ◽  
Job Stress ◽  
Work Life ◽  
Working Environment ◽  
Quality Of Work Life ◽  
Quality Of Work ◽  
Significant Difference ◽  
Service Productivity ◽  
The Impact

Quality of work life is the major factor to be considered in working environment of any organization. The performance of employees and the organization lies on the ability of the employees based on working environment. The QWL leads to better working environment which improves the performance of organization. The present study has made an attempt to find the level of factors causing QWL and the impact of outcome of QWL in banks. Since the profile of the banks may be associated with the level of outcomes of QWL, the present study has made an attempt to examine it with the help of one way analysis of variance and t-test. The included outcomes of QWL are job satisfaction, job stress, organizational climate, organizational commitment, employees retention behaviour, service quality employees and service productivity of employees. The highly associated determinants of QWL and the significant difference among the PUSBs and PRSBs have been noticed. The significantly associating important profiles of the banks regarding the existence of outcome of QWL are identified.

Assessment of the impact of factors of the working environment on the health of workers in oil refining based on the analysis of morbidity

2020 ◽  
pp. 600-600 ◽  
Author(s):  
I. V. Ginko ◽  
T. M. Sushinskaya ◽  
A. L. Rybina
Keyword(s):  
Comparison Group ◽  
Main Group ◽  
Working Environment ◽  
Oil Refinery ◽  
Oil Refining ◽  
Production Environment ◽  
The Impact

Studies have been conducted to assess the impact of factors of the production environment on employees of the oil refinery ofJSC «Naftan». Significant differences with the comparison group on the indicators of SVT were revealed. Priority nosological forms of employees of the main group are identified.

New areas of research in occupational medicine

2020 ◽  
pp. 811-811
Author(s):  
E. E. Shigan
Keyword(s):  
Occupational Medicine ◽  
Working Environment ◽  
Medium Businesses ◽  
The Impact

The study of the preservation of worker's health in recent years is gaining more and more new areas of research, among which like to point out the problems of harmonization of age and work, the impact of unemployment on health and aspects of the impact of the working environment of small and medium businesses on health.

Assessment of motor activity of knowledge workers (on the example of employees of social service centers)

2020 ◽  
Vol 60 (11) ◽  
pp. 727-729
Author(s):  
Nadezhda S. Belyakova ◽  
Artyom K. Sergeev
Keyword(s):  
Body Weight ◽  
Motor Activity ◽  
Social Service ◽  
Preventive Measures ◽  
Knowledge Workers ◽  
Actual Body Weight ◽  
Service Center ◽  
Work Shift ◽  
Working Day ◽  
The Ideal

Introduction. The work of many employees in the service sector is associated with a constant stay in a forced working position sitting at the computer for up to 60-80% of the time of the entire work shift, which leads to fatigue. The rate of fatigue depends on the specifics of work: it is much more likely to occur when working with monotony, muscle tension. An important role in the appearance of fatigue is also played by the attitude of a person to the work performed. The aim of study is to study the motor activity of knowledge workers in social service centers for the development of preventive measures aimed at reducing hypokinesia and hypodynamia during the work shift. Materials and methods. The following methods were used in the study: questionnaire and working day timing, calculation methods to determine whether the actual body weight corresponds to the ideal one using the Broka’s index and the Ketle’s index. The study involved employees of the integrated social service center "Raduga" in Bugulma. Results. An assessment of the motor activity of employees of the social service center of the population was made, and it was concluded that the problem of hypokinesia and hypodynamia is relevant and significant for employees of social service centers of the population both in their daily activities and during the work shift. Most of the employees showed an increase in actual body weight compared to the ideal one, which is to some extent due to hypokinesia and hypodynamia both during the working day and at home. Conclusions. Preventive measures aimed at compliance with the principles of rational nutrition and a healthy lifestyle, work and rest regimes, high-quality preliminary and periodic medical examinations are proposed.

Hygienic aspects of working conditions of workers in the Samara region

2020 ◽  
pp. 564-564
Author(s):  
N. S. Belyakova ◽  
N. M. Tsunina ◽  
A. S. Karapetyan
Keyword(s):  
Working Conditions ◽  
Female Body ◽  
Working Environment ◽  
Working Day

The factors of working conditions that affect the health of women during the working day are listed. Developed measures to create a favorable working environment for the female body.

Evaluation of Hydraulic Fracturing Models and Their Limitations to Predict No-Drill Zones for Horizontal Directional Drilling

2018 ◽  
Author(s):  
Saeed Delara ◽  
Kendra MacKay
Keyword(s):  
Hydraulic Fracturing ◽  
Safety Factor ◽  
Standard Procedure ◽  
Accurate Determination ◽  
Strength Properties ◽  
Analytical Models ◽  
Alternative Methods ◽  
Directional Drilling ◽  
Horizontal Directional Drilling ◽  
The Impact

Horizontal directional drilling (HDD) has become the preferred method for trenchless pipeline installations. Drilling pressures must be limited and a “no-drill zone” determined to avoid exceeding the strength of surrounding soil and rock. The currently accepted industry method of calculating hydraulic fracturing limiting pressure with application of an arbitrary safety factor contains several assumptions that are often not applicable to specific ground conditions. There is also no standard procedure for safety factor determination, resulting in detrimental impacts on drilling operations. This paper provides an analysis of the standard methods and proposes two alternative analytical models to more accurately determine the hydraulic fracture point and acceptable drilling pressure. These alternative methods provide greater understanding of the interaction between the drilling pressures and the surrounding ground strength properties. This allows for more accurate determination of horizontal directional drilling limitations. A comparison is presented to determine the differences in characteristics and assumptions for each model. The impact of specific soil properties and factors is investigated by means of a sensitivity analysis to determine the most critical soil information for each model.

scholarly journals Is the perceived impact of disciplinary procedures on medical doctors’ professional practice associated with working in an open culture and feeling supported? A questionnaire among medical doctors in the Netherlands who have been disciplined

BMJ Open ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. e036922
Author(s):  
Berber S Laarman ◽  
Renée J R Bouwman ◽  
Anke J E de Veer ◽  
Roland D Friele
Keyword(s):  
Professional Practice ◽  
Negative Impact ◽  
Working Environment ◽  
Perceived Support ◽  
Medical Doctors ◽  
Safe Environment ◽  
Item Questionnaire ◽  
Disciplinary Procedures ◽  
Perceived Impact ◽  
The Impact

IntroductionDisciplinary procedures can have a negative impact on the professional functioning of medical doctors. In this questionnaire study, doctors’ experience with open culture and support during a disciplinary procedure is studied to determine whether open culture and support are associated with perceived changes in the professional practice of doctors.MethodsAll doctors who received a warning or a reprimand from the Dutch Medical Disciplinary Board between July 2012 and August 2016 were invited to fill in a 60-item questionnaire concerning open culture, perceived support during the disciplinary procedure and the impact of the procedure on professional functioning as reported by doctors themselves. The response rate was 43% (n=294).ResultsA majority of doctors perceive their work environment as a safe environment in which to talk about and report incidents (71.2% agreed). Respondents felt supported by a lawyer or legal representative and colleagues (92.8% and 89.2%, respectively). The disciplinary procedure had effects on professional practice. Legal support and support from a professional confidant and a professional association were associated with fewer perceived changes to professional practice.ConclusionOur study shows that doctors who had been disciplined perceive their working environment as open. Doctors felt supported by lawyers and/or legal representatives and colleagues. Legal support was associated with less of a perceived impact on doctors’ professional practice.

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