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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Zmienność szyszek jodły pospolitej (Abies alba Mill.) - zmienność parametrów zewnętrznych szyszek

100%
Aniszewska M., Bluszkowska U.
Leśne Prace Badawcze
|
2016
|
tom 77
|
nr 3
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Badanie sezonowosci prac lesnych

100%
Bluszkowska U., Nurek T.
Technika Rolnicza Ogrodnicza Leśna
|
2010
|
nr 05
22-24
W artykule omówiono problemy związane z sezonowością prac leśnych oraz wynikającym z niej zmiennym zapotrzebowaniem na pracę ludzką. Opracowano metodę badania zapotrzebowania na poszczególne kategorie pracowników oraz przedstawiono wyniki wstępnych analiz.
3
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Issues of provisions in the Specification of the Essential Terms of Contract (SIWZ) in tenders for realization of forestry works

100%
Bluszkowska U., Nurek T.
Folia Forestalia Polonica. Series A . Forestry
|
2016
|
tom 58
|
nr 2
4

Study of impact of the seasonality of forestry work on the demand for employees of forestry service companies (FSC)

100%
Bluszkowska U., Nurek T.
Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria
|
2012
|
tom 11
|
nr 3
One of the characteristic features of forestry work is its seasonality. Most of forestry work comprises simple activities not requiring any special preparation from the workers who do it. However, the current state of forest technology makes it possible to perform many operations, using machines and technical equipment. In Poland, the type of work that is used most often is manual work. It is still relatively cheap and available. Most of the companies providing services for forest management departments just use this simplest form of performing tasks and hire so-called seasonal employees to perform them. Thanks to this solution, the costs of keeping employees in the event there is a seasonal fall in demand for their services, is eliminated. The principal purpose of the research undertaken is to propose technological and organizational solutions that would diminish the impact of natural seasonality of forestry work on the level and structure of employment in the forestry service companies. The initial analyses show that by increasing the degree of work mechanization the demand for employees performing tasks in a forest management department may be reduced even by several tens of persons per month.
5
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Wpływ czynników organizacyjnych na wydajność eksploatacyjną harwestera

100%
Bluszkowska U., Nurek T.
Sylwan
|
2016
|
tom 160
|
nr 06
High unit costs of mechanized timber harvesting are a major obstacle for the development of this process in Poland. Apart from that, other important factors include forests structure, work organization and principles of the forest utilisation in the State Forests. Fragmentation and dispersal in the superintendence economic tasks related to the acquisition of wood affect the reduction of the degree of use of the machine during the working day. In this study, we paid particular attention to the harvester runs between successive tasks and between tasks and bases of the night stopover. The above−mentioned organizational factors can substantially affect the performance of the machine and their potential reduction could improve the economic efficiency of the use of harvesting machines in the Polish forests. The simulation calculations assumed fixed total area covered by the work of logging and fixed total amount of acquisitions. The parameters of the variables in the calculation was the number of tasks performed and the number of bases of the night stopover. Change in the previous parameter was clear with the volume of a single task and the distance between them. The paper discusses the results of research on the impact of these parameters on the multioperational machine operating efficiency. Reducing the number of jobs (increasing their size) causes significant increase in harvester efficiency. In extreme cases, it may be up to about 20%. The article also points to the possibility of better organization of work and thereby the economic effects of the use of harvesting machines in selected forest areas. Deciding on the organization of work in a specific forest district one should however also take into consideration principles of the forest utilisation.
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Effect of mechanization level on manpower needs in forestry

100%
Bluszkowska U., Nurek T.
Folia Forestalia Polonica. Series A . Forestry
|
2014
|
tom 56
|
nr 4
7

Małe traki mobilne

81%
Bluszkowska U., Brzozko J., Kaczynski K.
Drwal. Pismo Przedsiębiorców Leśnych
|
2017
|
nr 08
8
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Wpływ wilgotności i gatunku drewna opałowego na przebieg procesu łupania

81%
Brzozko J., Samoraj P., Bluszkowska U., Aniszewska M.
Sylwan
|
2017
|
tom 161
|
nr 08
Traditional firewood is still the most popular type of solid fuel. This is mainly because of the availability of raw materials and simple production process, which involves mostly just sawing and cleaving. Cleaving increases the surface of the wood through which water evaporates, which in turn speeds up the drying. Dry wood has a higher calorific value and its combustion releases less harmful carbon monoxide and hydrocarbons. Wood cleaving process can be divided into three phases that lasts from the introduction of the wedge till the appearance of a crack (phase I), from the appearance of the crack till the stop of the slots (phase II) and then until the piece of the wood is completely cleaved (phase III). Although it is a conditional phase and it does not always occur in the case of the firewood species popular in Poland, the last phase takes the longest and has the greatest impact on the cleaving performance. The aim of the study was to determine the effect of wood and its moisture content on the duration of the phase III during the trial cleaving. The tested samples comprised of five popular in Poland species: hornbeam, beech, birch, alder and ash. The cleaving were carried out immediately after cutting and sawing the timber and after 3−month−long period of natural drying. For hornbeam, beech and alder humidity does not affect the hollow wedge in wood at the time of rupture. The duration of phase III was significantly longer than duration of phases I and II for each species independently of humidity. Significant dependence was observed for depression wedge as a function of humidity obtained in phase I and II for silver birch, and in phase III for ash.
9

Mechaniczne łupanie

80%
Bluszkowska U., Brzozko J.
Drwal. Pismo Przedsiębiorców Leśnych
|
2017
|
nr 06
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