scholarly journals FOREST PLANTATION. HOW TO CUT, HOW TO PLANT AND GROW?

2021 ◽  
Author(s):  
Y. Shirnin ◽  
I. Gaisin ◽  
A. Shirnin ◽  
D. Shamov
Keyword(s):  
Main Parameter ◽  
Selective Logging ◽  
Forest Plantation ◽  
Scientific Publications ◽  
Planting Material ◽  
Machine Systems ◽  
Working Bodies ◽  
Selection Of Species ◽  
Selection Of ◽  
Effective Growth

A critical analysis of scientific publications devoted to the schemes and parameters of placement (planting) on the territory of the plantation of planting material is presented. The analysis of the dimensions of the machines and their working bodies in comparison with the options for planting plantation plantings is presented. Possible systems of machines for selective logging on forest plantations are recommended, which ensure felling of trees without damage to the stand left for re-growth. A scheme for growing and harvesting timber on plantations has been developed and justified. The main parameter that affects the effective growth of crops is the density of the stand. Its regulation is directed to the proposed options for thinning. The main parameters that should be taken into account when predicting the characteristics of the stand left for rearing are presented. Requirements for the technology of logging on plantations have been developed to minimize the damage to the individuals left for rearing. Recommendations on the selection of species for growing on the plantation, as well as machine systems for cutting operations, taking into account the geometric parameters of stands for different periods of logging, are proposed. Recommendations are given on the technological schemes for the development of apiaries during logging under specified conditions with the achievement of the goals set by the recommended machine systems.

Teacher Education: study on professional development in Productions published on the CAPES journals portal

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Luiz Anselmo Menezes Santos ◽  
Antônio Hamilton Dos Santos ◽  
Viviane Novaes de Souza ◽  
Hudson Leonardo Cordeiro de Moura
Keyword(s):  
Professional Development ◽  
Teacher Professional Development ◽  
School Context ◽  
Review Of The Literature ◽  
Scientific Publications ◽  
Education Study ◽  
Teacher Professional ◽  
Knowledge Type ◽  
New Instruments ◽  
Selection Of

This study aimed to identify and analyze scientific publications related to training that address professional development. It was based on the selection of articles from the CAPES Journal Portal database, in which 12 references were analyzed. Among the main authors that supported this work, choose: (Garcia, 1999), (André, 2017), (Alarcão, 2014), (Gatti & Barreto, 2009) who have a great contribution in research on teacher professional development. The methodology used, according to (Morosini & Fernandes, 2014), stands out as a review of the literature, of the state of knowledge type. The results show that it is necessary for the teacher to develop professionally, always renewing his knowledge, overcoming the difficulties present in the school context, introducing new instruments and mechanisms so that the classes have more meanings and senses and consequently a solidification in relation to the - students' learning, thus contributing to the existence of comprehensive training.

scholarly journals Prioritization and Selection of High Biomass Energy Producing Plant Species at Boset District, Central Ethiopia: An Ethnobotanical Approach 

2021 ◽  
Author(s):  
Tinsae Bahru Yifru ◽  
Berhane Kidane ◽  
Amsalu Tolessa
Keyword(s):  
Plant Species ◽  
Sustainable Use ◽  
Biomass Energy ◽  
Calotropis Procera ◽  
Sampled Data ◽  
High Biomass ◽  
Structured Interviews ◽  
Acacia Senegal ◽  
Selection Of Species ◽  
Selection Of

Abstract Background: In Ethiopia, about 92.3% of all the biomass energy is consumed by domestic households and the demand is growing from 10-14%. However, there are little/no practical experiences or documented indigenous knowledge on how traditional people identify and select high biomass producing plant species with short rotation periods at Boset District. Therefore, the present study was aimed at: (1) selecting and documenting high biomass energy producing plant species at Boset District; (2) identifying major predictor variables that influence the prioritization and selection of species; and (3) develop a Generalized Linear Model (GLM) to predict the selection of species. Methods: A total of 96 informants comprising 59 men and 37 women between the ages of 18 and 81 were sampled. Data were collected using structured interviews, guided field walk, discussions and field observations. Results: Collected data indicated that 88.5% of the informants involved in firewood collection, while 90% practiced charcoal making. A total of 1533.60 Birr per household on average was earned annually from this activity. A total of 25 firewood and/or charcoal plant species were identified and documented at Boset District. Of these, Acacia senegal, Acacia tortilis and Acacia robusta were the three best prioritized and selected indigenous high biomass producing species. Prosopis juliflora, Parthenium hysterophorus, Azadirachta indica, Calotropis procera, Cryptostegia grandiflora, Lantana camara and Senna occidentalis further grouped under introduced fuelwood species. Prediction of GLM assured sampled Kebeles and source of income generated from fuelwood species positively and significantly (p<0.001) related to selection of species. Higher efficiency to provide energy and heat; little or no smoke or soot; easier to cut and split the wood and easier availability were some of the main selection criteria. Conclusions: This study provides valuable information in selection and documenting of high biomass producing plant species for proper management and sustainable use at Boset District. The three most selected species (A. senegal, A. tortilis and A. robusta) should be further evaluated at laboratory to determine their energy values.

scholarly journals ANALYSIS OF THE REVERSING MECHANISM OF LIGHT INDUSTRY EQUIPMENT

2021 ◽  
Vol 1 (63) ◽  
pp. 38-43
Author(s):  
S. Koshel ◽  
◽  
G. Koshel ◽  
Keyword(s):  
Angular Acceleration ◽  
Loop Formation ◽  
Light Industry ◽  
Quality Performance ◽  
Equipment Operation ◽  
Cyclic Movement ◽  
Working Bodies ◽  
The Right ◽  
Logical Process ◽  
Selection Of

To create reliable and highly efficient, en- ergy-saving machines for light industry, it is necessary to study the dynamic processes of movement of the links of the mechanisms of which they are composed. Especially such studies should be given attention for machines, the mechanisms of which have a cyclic nature of action. During the execution of a technological operation in light industry machines with a periodic cyclic movement of the working bodies, an uneven movement of the main shaft occurs. This is caused by the movement of the links of the mechanism with certain accelerations and taking into account the periodic nature of the action of technological loads, which vary in magnitude and direction. The uneven nature of the movement leads to the appearance of additional loads in the kinematic pairs of mechanisms, mechanical vibrations in the mechanical trans- mission systems of motion, leads to the appearance of vibrations and violations in the positioning of the working bodies, affects the techno- logical process of the equipment. Uniform and stable tension of the threads is the key to a high-quality performance of the loop formation process in knitwear. Additional dynamic loads affect the technological tension of textile threads during equipment operation. These loads are caused by the accelerated movement of the links of the mechanism, which is especially important for technological equipment with the pres- ence of a reverse working stroke of its links. In such mechanisms, the values of the angular acceleration of the links and the linear accelera- tion of their individual points can acquire critically permissible values. It is possible to ensure the movement of the working bodies of the machine according to the law for which the tension of the threads will be optimally necessary. To do this, you need to choose the right type of mechanism that sets them in motion. The aim of the work is to conduct a structural-kinematic research of the mechanism of the reversible movement of the needle drum of a knitting machine, which will justify the selection of the required type of mechanism for such equipment. The confirmation of the improvement of the conditions for the formation of loops when knitting on a knitting machine with a reversible needle drum movement, made on the basis of a rocker mechanism, has been obtained.

Influence of geometric parameters of screw nozzles of twin-screw extruder-press on oil yield

2021 ◽  
Vol 12 (3) ◽  
Author(s):  
M. M. Gudzenko ◽  
◽  
V. P. Vasyliv ◽  
M. M. Mushtruk ◽  
M. M. Zheplinska ◽  
...  
Keyword(s):  
Free Volume ◽  
Geometric Parameters ◽  
Oil Yield ◽  
General Nature ◽  
Geometrical Parameters ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw ◽  
Working Bodies ◽  
Selection Of

In modern economic conditions, the chosen technology of raw material processing and the choice of the necessary equipment for both the line as a whole and the oil press are of great importance in oil production. In small-capacity workshops, screw presses of various designs are used. The twin-screw extruder occupied a certain niche among the press equipment with a productivity of 150–500 kg/h. Their use can significantly simplify the technology of oilseed processing. They combine operations of heat treatment, grinding, and pressing of vegetable oil. It is important to study the influence of geometric parameters of the oil pressure path and screw nozzle on the oil yield. In twin-screw extruders, it is rational to choose the pitch of the worm, the width of the channel between the turns, the width of the crest of the turn and the length of the nozzle with variable geometrical parameters. The analysis and selection of geometrical parameters of working bodies of a twin-screw extruder on the basis of theoretical calculations are carried out. Two sets of experimental working bodies with the changed geometrical parameters are made. Their theoretical degree of compression is determined, which is 5.50, 4.69, and 4.33, respectively. It is experimentally confirmed that the oil yield depends on the degree of compression due to the geometric parameters of the screw. The effect of a sharp drop in the free volume of the screw on the energy performance and press extruder performance has been revealed. The general nature of the change in the free volume in the areas of nozzle groups is accompanied by an uneven decrease of 40–80% towards the release of oil cake. The nature of the change in the free volume of turns along the length of the screw shaft characterizes the correctness of its design. The selection of rational geometric parameters of the working bodies should be considered in combination with other design parameters, which will intensify the process of oil pressing.

scholarly journals Preliminary Studies Regarding the Selection of Species and Types of Pot and Container for Vegetable Growing

2019 ◽  
Vol 76 (1) ◽  
pp. 58
Author(s):  
Mirabela GACHE (LUNGU) ◽  
Neculai MUNTEANU ◽  
Vasile STOLERU ◽  
Gabriel TELIBAN ◽  
Carmen CABA (INCULEŢ)
Keyword(s):  
Plant Growth ◽  
Growth And Development ◽  
Climatic Conditions ◽  
Selection Of Species ◽  
Choice Of Species ◽  
Selection Of

The purpose of the research reported in this paper was to evaluate the possibility of growing vegetable plants in pots and containers by optimizing the choice of species and cultivars and the type of pot or container based on the information available in the literature and on the basis of our own experience. Taking into account the purpose and objectives of this paper, the study is structured to respond to each  bjective considered. Information on crops in pot and containers shows that if the climatic conditions necessary for growth and development areoptimal, basically any vegetable species can be grown in this system (Purnell, 2007). Concerning the pots in which vegetable plants can be grown, they are diverse and may be chosen specifically for this type of culture or can be assigned to provide the space necessary for plant growth for different species.

scholarly journals The MINOUWApp: a web-based tool in support of by-catch and discards management

2020 ◽  
Vol 192 (12) ◽  
Author(s):  
Lorenzo D’Andrea ◽  
Aida Campos ◽  
Karim Erzini ◽  
Paulo Fonseca ◽  
Simone Franceschini ◽  
...  
Keyword(s):  
Management Strategies ◽  
Fishing Effort ◽  
Negative Effects ◽  
Web Based ◽  
Management Plans ◽  
By Catch ◽  
Selection Of Species ◽  
Areas Of Interest ◽  
Ecosystem Based Fisheries Management ◽  
Selection Of

AbstractCurrent fishing practices often do not allow adequate selection of species or sizes of fish, resulting in unwanted catches, subsequently discarded, with the consequent negative effects on both marine communities and fisheries profitability. The cross-analysis of density patches of potential unwanted catches and distribution of fishing effort can support the identification of spatial-temporal hot-spots in which the fishing pressure should be reduced to limit the amount of discards. The MinouwApp represents a technological and methodological framework to bring different, and structurally complex, sources of georeferenced data together into a simple visual interface aiming to interactively explore temporal ranges and areas of interest. The objective is to improve the understanding of fisheries dynamics, including discards, thus contributing to the implementation of discard management plans in a context of participative, ecosystem-based fisheries management strategies.

scholarly journals The results of the introduction of Juglans mandshurica Maxim. into the oak-woods of the Khopyor region

2018 ◽  
Vol 11 ◽  
pp. 00030
Author(s):  
Anastasia Ovcharenko ◽  
Alevtina Ovcharenko
Keyword(s):  
Species Composition ◽  
Environmental Conditions ◽  
Flood Plain ◽  
Distribution Area ◽  
Juglans Mandshurica ◽  
Ecological Functions ◽  
Natural Distribution ◽  
The Stability ◽  
Selection Of Species ◽  
Selection Of

An analysis of the results of the introduction of Juglans mandshurica Maxim. into the flood-plain oak-woods of the Khopyor is conducted. The total bioecological assessment and prospects of the introduction into the natural flood-plain oak-woods of the Middle Khopyor region for the enrichment of their species composition with the aim of enhancing the sustainability of these ecosystems and optimization of their ecological functions are given. The compliance of the environmental conditions of the growth of introduced stands in the middle reaches of the Khopyor River, original within the natural distribution area is found. Alongside with the identified typical directions of reduction in the indicators of the stability and productivity of this breed in introduced centres in comparison with the natural areas there detected trends in increasing the resistance of the species in the succeeding generations, as a result of clone variability, a selection of species with a high vital potential and adaptive capacity.

Threatened species not necessarily rare, rare species not necessarily threatened

1997 ◽  
Vol 24 (3) ◽  
pp. 207-209 ◽  
Author(s):  
ALF OREDSSON
Keyword(s):  
Plant Species ◽  
Vascular Plant ◽  
Threatened Plants ◽  
World Conservation ◽  
Red Data Book ◽  
Vascular Plant Species ◽  
Data Book ◽  
Selection Of Species ◽  
Of Greece ◽  
Selection Of

In the beautifully-illustrated book of rare and threatened plants of Greece (Phitos et al. 1995), the selection of species is based strictly on the four World Conservation Union (IUCN) categories of ‘extinct’, ‘endangered’, ‘vulnerable’ and ‘rare’ (Lucas & Synge 1978). The Swedish ‘red data’ book of plants (Aronsson et al. 1995) adds ‘care-demanding species’ to the list. Five percent of the total number of vascular plant species in Greece are included in the Greek book, while 23% of the vascular plant species in Sweden are in the Swedish book. This latter percentage may appear to be sufficiently large, but is it?

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