scholarly journals Modeling of technical, economic, environmental and ergonomic parameters of forestry machines in function of the quantity of days of the working scale

Author(s):  
Diego Weslly Ferreira do Nascimento Santos ◽  
Marconi Ribeiro Furtado Junior ◽  
Juliana Pinheiro Dadalto ◽  
Larissa Nunes do Santos ◽  
Daniel Mariano Leite

Forest machine operators work on a long scale of work, which causes physical and psychological wear and consequently reduced productivity and increased fuel consumption. The objective of this research was to verify the influence of the number of days of the work schedule of harvester and forwarder operators in low-volume forest on technical, economic, environmental and ergonomic parameters. The research was performed in forest stands with an average wood volume of 0.10 m³ tree-1. In the first, second, third and fourth day of the work schedule, productivity, energy demand, production cost, carbon dioxide emission and the occurrence of fatigue in the operators were determined. The productivity values ??of harvester operators on the third and fourth days of the work schedule decreased by 2.62 and 7.74%, respectively, in relation to the average value of the first and second days. The productivity of forwarder operators was similar in the first three days of the work schedule, with a more marked reduction in the fourth day. The reduction in the number of days in the forest machine operators’ work schedule makes the operation more sustainable from a technical, economic, environmental and ergonomic point of view.

2005 ◽  
Vol 31 (2) ◽  
pp. 224-246 ◽  
Author(s):  
Noah M. Meltz

The objective of this paper is to examine the operation of individual labour markets from the point of view of possible government intervention. The first section sets out a theoretical framework describing the operation of individual labour markets, while the second section develops a two-stage approach for identifying the sources of persistent imbalances in particular labour markets. The third section applies the proposed approach to three occupations in the Toronto area : auto mechanics ; sewing-machine operators ; and packaging hands. Alternative approaches by government are suggested for dealing with these imbalances.


1960 ◽  
Vol XXXIII (III) ◽  
pp. 417-427 ◽  
Author(s):  
John Kristoffersen

ABSTRACT By means of chromatographic and spectrophotometric methods progesterone and a substance closely similar to 20β-hydroxy-pregn-4-ene-3-one has been detected in luteal tissue from non-pregnant and pregnant cows. In 21 animals quantitative measurements based on a method giving an average net recovery of 56 per cent showed that in pregnancy the average progesterone content in the corpus luteum reached a maximum in the third to fifth month, with low values before and after this period. For 6 nonpregnant cows, the average value was 20.2 μg/g tissue, which is considerably higher than previous values reported in the literature. The relation between these findings and the bovine dependence on a functional corpus luteum in pregnancy is discussed, and it is pointed out that more information about the metabolism of progesterone in cattle is highly desirable.


2018 ◽  
Vol 69 (8) ◽  
pp. 2191-2196
Author(s):  
Cristian Constantin Budacu ◽  
Nicoleta Ioanid ◽  
Cristian Romanec ◽  
Mihail Balan ◽  
Liliana Lacramioara Pavel ◽  
...  

Canine plays an important role in the dento-maxillary system. From a functional point of view, it provides the canine guidance, by positioning it in the frontal area, has a role in facial aesthetics. It plays an important prosthetic role by having the longest root and one of the longest arcade teeth. Three molars represent the last teeth that erupt in the arches both in the jaw and in the mandible, which is why they remain the most frequently included.Canine incidence is quite common following the wisdom tooth. It can be unilateral or bilateral and is more common in the upper jaw. The canine may remain included at the vestibular, palatal or between the two bones. A separate entity is the incision of the canine in the edentulous mandible or jaw. The study included 213 cases with dento-alveolar pathology, of which 128 patients were selected with dental inclusion. Our study reports that the first three molars are frequent, followed by the canine as opposed to other studies conducted by Guzduz K in 2011 and Fardi A of the same year bringing the canines first (Fardi, Guzduz). Some studies attribute the first place to the superior canine in terms of frequency, but they are abstracted from the molar three inclusion that they consider as most frequently (Compoy). The most common tooth in inclusion is the third molar (lower and upper) followed by the upper canine; the most commonly affected are women for both canine and molar.


Author(s):  
Anatoly S. Kuprin ◽  
Galina I. Danilina

The purpose of this study is the analysis of limit situation in the narrative of war. The material of the study is the novel of Daniil Granin “My Lieutenant” and related texts. In the first part of the paper, the authors explore existing approaches to the term “limit situation” and similar concepts into scientific and philosophical traditions; limits of its applicability in literary studies and its relation to the categories of “narrative instances” and “event”. Proposed a literary-theoretical definition of the limit situation, which can be used in the analysis of fiction texts. Existing approaches to the examination of the situation of war are analyzed: philosophical-existential, psychoanalytic, sociological, literary. In the second part of the paper, the authors propose their method for analyzing limit situations in texts about war, which basis on existing approaches and preserves the text-centric principle of studying the structure of the story. Two interrelated areas of research have been identified: the study of war as a continuous limit situation in the intertextual aspect (the discourse of war); the study of limit situations (death, suffering, guilt, accident) in the narrative of war as part of a specific text. In the third part of the scientific work,the analysis of war as a continuous limit situation results in the study of the concept of “limit” (border) in a fiction text. The role of “limit” (border) concept in the texts about the war is studied, the possible types of limits in the discourse of war are examined. Limit situations in the narrative of war are analyzed on the basis of the novel “My Lieutenant” by Daniil Granin. A review of journalistic and scientific works about the novel revealed both the continuity and the differences between the novel and the “lieutenant” prose of the 20th century. An analysis of the limit situations in the novel revealed their key position in the narrative. These situations are independent of the fiction time, of the fluctuation of the point of view’; the function of the abstract author is to build the narrative as a “directive” immersion of the hero and narrator in these situations.


2014 ◽  
Vol 2 (3) ◽  
Author(s):  
Redacción CEIICH

<p class="p1">The third number of <span class="s1"><strong>INTER</strong></span><span class="s2"><strong>disciplina </strong></span>underscores this generic reference of <em>Bodies </em>as an approach to a key issue in the understanding of social reality from a humanistic perspective, and to understand, from the social point of view, the contributions of the research in philosophy of the body, cultural history of the anatomy, as well as the approximations queer, feminist theories and the psychoanalytical, and literary studies.</p>


Encyclopedia ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 542-551
Author(s):  
Mirko Vagnoni
Keyword(s):  

William II of Hauteville King of Sicily (1171–1189). William II of Hauteville was the third king of the Norman dynasty on the throne of Sicily. He ruled independently from 1171 (from 1166 to 1171 he was under the regency of his mother) to 1189. From an iconographic point of view, he is particularly interesting because he was the first king of Sicily who made use of monumental images of himself. In particular, we have five official (namely, commissioned directly by him or his entourage) representations of him: the royal bull, the royal seal, and three images from the Cathedral of Monreale (near Palermo): two mosaic panels and one carved capital.


2015 ◽  
Vol 10 (6) ◽  
pp. 1934578X1501000 ◽  
Author(s):  
Christine Zitzelsberger ◽  
Gerhard Buchbauer

This work is an update of a recently published review and is consistently referred to this article and recent findings about plants’ indirect defense are added on. Herbivore induced plant volatiles (HIPVs) and their effects on the third trophic level that involves predators and parasitoids are discussed. The fact that plants are not passive individuals is confirmed on the basis of several studies. Plants can perceive and respond to cues in their environments with plastic morphological, physiological and behavioral traits. Plasticity allows plants to tailor their defenses to their current and expected risks caused by herbivores. The “cry for help” of plants is also observed from the carnivores’ point of view. The volatile mixture contains crucial information for decisions of carnivorous insects. Furthermore, the most important methods to examine the behavioral response of carnivorous insects to HIPVs are presented not only in laboratory set ups but also in the field. Manipulations of plants by silencing genes or over-expressing genes can help to understand mechanisms of indirect defense. Various interesting examples of indirect defense reveal the possibility to use HIPVs in biological control. Therefore, the application of synthetic pesticides, that pollute the environment, may be reduced in the future.


1945 ◽  
Vol 35 (1-2) ◽  
pp. 58-64 ◽  
Author(s):  
H. H. Scullard

In the settlement of Greece after the Third Macedonian War Roman policy was at times moderate, at times harsh. On occasion the difference might represent only an individual point of view: thus the terms imposed upon Macedonia might seem generous to a Roman who contemplated the grant of ‘freedom’ to the Macedonians, the reduction of taxation and the absence of territorial aggression on Rome's part, while they might equally seem harsh to a Macedonian who felt that his sense of nationhood had been violated by Rome's creation of the four independent Republics. But towards Epirus Roman policy seems to have been marked by two successive stages, the first moderate, the second brutal. It is the purpose of this note to attempt to consider the causes which determined this change and to examine what influence the Epirote Charops exercised upon the measures which turned his country into a playground for Roman brutality and ultimately into an abomination of desolation.


2021 ◽  
Vol 10 (2) ◽  
pp. 304-312
Author(s):  
Nurfadillah S ◽  
Wardihan Sinrang ◽  
Suryani As'ad ◽  
Muh. Nasrum Massi ◽  
Mardiana Ahmad ◽  
...  

Background: According to 2018 World Health Organization (WHO) data globally, an estimated 17.3% of the population has inadequate zinc intake, with estimates ranging from 5.7% in Oceania to 7.6% in Europe, 9.6% in America and the Caribbean, highest in Africa (23.9%) and Asia (19.6%). Zinc is important for the function of a number of enzymes and growth hormones during pregnancy. In pregnant women, the relative zinc concentration decreases up to 35% due to the influence of hormonal changes and the transport of nutrients from mother to baby. Objectives: The purpose of this study was to identify the effect of giving zinc tablets to pregnant women with zinc deficiency in the third trimester on body weight and length of babies born at the Makassar City Health Center. Methods: This type of research is True Experimental with a pretest-posttest design with a control group. The sample in this study was 62 samples of third trimester pregnant women, and the sampling technique used was purposive sampling. Measurement of zinc levels in third trimester pregnant women using the Elisa reader kit at the Research Laboratory of the Hasanuddin University Teaching Hospital. The research instruments were in the form of a research explanation sheet, respondent's consent sheet, respondent's checklist sheet, and the mother's zinc tablet consumption control sheet for 14 days. Results: Judging from the average value of newborns in pregnant women who did not have zinc deficiency, the average value of birth weight in pregnant women with zinc deficiency was 15.70 g/dL and 18.95 g/dL. zinc deficiency with a value (p < 0.05), while pregnant women with zinc deficiency have an average birth length of 10.00 g/dL and mothers who do not have a deficiency of 19.87 g/dL with a value (p < 0.05). So, it can be concluded that giving zinc tablets to pregnant women in the third trimester has an effect on Birth Weight (BBL) and Birth Length (PBL). Conclusion: Giving zinc tablets has an effect on increasing zinc levels in third trimester zinc deficiency pregnant women and increasing birth weight and length of the baby.  


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