Light quantity and quality on the forest floor of pioneer and climax stages in a birch–beech–sugar maple stand

1988 ◽  
Vol 18 (5) ◽  
pp. 615-622 ◽  
Author(s):  
Christian Messier ◽  
Pierre Bellefleur
Keyword(s):  
Solar Radiation ◽  
Forest Floor ◽  
Sugar Maple ◽  
Ecological Significance ◽  
Forest Canopies ◽  
Main Species ◽  
Light Quantity ◽  
Two Stages

The quantity and quality of solar radiation (300 to 1100 nm) beneath forest canopies were compared on sunny (sunflecks excluded) and cloudy days between the pioneer and climax stages of a birch–beech–sugar maple stand, and among the main species within these two stages of succession. The climax stage (mature canopies) transmits less energy between 300 and 1100 nm and casts smaller red to far red ratios than the pioneer stage (5-year-old canopies) on both sunny and cloudy days. Moreover, the canopies of the main species within each of these two stages of succession do not transmit the same quantity and quality of solar radiation. All these differences are greater on cloudy than sunny days. Leaf transmittance varies among species but this alone does not explain the differences in canopy transmission among these same species. The results are discussed in relation to the ecological significance for the plants growing under birch–beech–sugar maple stands.

OS CAMINHOS DAS ÁGUAS NO MUNICÍPIO DE CARIRÉ, CEARÁ, BRASIL

2019 ◽  
Vol 21 (2) ◽  
pp. 564-580
Author(s):  
Eloiza Rocha Queiroz ◽  
José Falcão Sobrinho
Keyword(s):  
Water Resources ◽  
Potable Water ◽  
Field Trips ◽  
Central Theme ◽  
Northeast Region ◽  
Brazilian Semiarid ◽  
Long Time ◽  
Short Rains ◽  
Two Stages

A região Nordeste do Brasil vem sendo alvo de medidas do Estado a mais de um século, na tentativa de solucionar o problema da falta de água em época de secas. O Estado do Ceará, por sua vez, apresenta boa parte de seu território inserido no semiárido brasileiro, uma região caracterizada pelo clima seco, com poucas chuvas e elevada evapotranspiração. A problemática da água existe há bastante tempo, principalmente o acesso em quantidade e qualidade suficientes para atender a população. O presente trabalho tem como tema central a questão dos recursos hídricos, com enfoque no abastecimento humano do município de Cariré, localizado na região noroeste do Ceará. Nosso objetivo consiste em apresentar um panorama de como atualmente a população carireense tem acesso à água potável. A metodologia adotada constitui-se em duas etapas: na primeira, realizamos levantamento de material bibliográfico e a segunda diz respeito a parte prática realizada em saídas a campo. Segundo a ONU, a água é um bem comum e que deve ser de acesso a todos, é um direito humano. Nesta perspectiva, o gerenciamento adequado dos recursos hídricos é essencial para a manutenção da qualidade de vida. Palavras-chave: Recursos Hídricos; Abastecimento Humano; Cariré-Ce. ABSTRACTThe pnortheast region from Brazil has been subject of measures for more than a century in attempts to solve the problems lack of water in dry season. The state of Ceará has a good part of its territorial inserted in Brazilian semiarid, a region characterized by dry climate, short rains and high evapotranspiration. The water issue has existed for a long time, mainly in a sufficient access of quantity and quality to serve the population. Then, this article has as a central theme the water resources focusing on water supply of the Cariré localized at Northeast region from Ceará. Therefore the purpose of the paper is to present a study about how the Carire’s population has had access to potable water currently. The methodology adopted to this research consists of two stages: Firstly it was carried out a survey of bibliographical material and secondly it concerned the practical part carried out in the field trips. In accordance to United nations, water is a commom good and it has to be available to everyone, it is a human rights. In that sense, the proper management of water resources is essential to keep the quality of life.Key-words: Human supply; Water resources; Cariré – Ce. RÉSUMÉLa région du nord-est du Brésil est la cible de mesures prises par l’État depuis plus d’un siècle pour tenter de résoudre le problème de la pénurie d’eau en saison sèche. L’État du Ceará, en revanche, présente une bonne partie de son territoire inséré dans le semi-aride brésilien, région caractérisée par un climat sec, avec peu de pluies et une forte évapotranspiration. Le problème de l'eau existe depuis longtemps, principalement l'accès en quantité et qualité suffisantes pour satisfaire la population. Le travail actuel a pour thème central la question des ressources en eau, en mettant l'accent sur l'approvisionnement humain de la municipalité de Cariré, située dans la région nord-ouest du Ceará. Notre objectif est de présenter un aperçu de la façon dont la population carioca a actuellement accès à l’eau potable. La méthodologie adoptée comporte deux étapes: dans le premier, nous procédons à une enquête sur le matériel bibliographique et le second à la partie pratique réalisée lors des visites sur le terrain. Selon l'ONU, l'eau est un bien commun et doit être accessible à tous, c'est un droit humain. Dans cette perspective, la gestion adéquate des ressources en eau est essentielle au maintien de la qualité de la vie.Mots-clés: Ressources en eau; Approvisionnement humain; Cariré-Ce.

scholarly journals Photo-selective shade nets on the production and quality of sugarcane plantlets

2019 ◽  
Vol 23 (5) ◽  
pp. 366-371 ◽  
Author(s):  
José J. F. Cordeiro Júnior ◽  
Héliton Pandorfi ◽  
José A. D. Barbosa Filho ◽  
Alex S. Moraes ◽  
Luiz A. de Almeida Neto ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Substrate Temperature ◽  
Principal Component ◽  
Global Solar Radiation ◽  
Saccharum Officinarum ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Randomized Design ◽  
Completely Randomized Design

ABSTRACT Brazil is the world’s largest producer of sugarcane (Saccharum officinarum L.) and research aimed at propagation has promoted higher quality in production. The objective of this study was to investigate the effect of the variation of micrometeorological elements on the survival and quality of pre-sprouted sugarcane plantlets. The study was carried out in a protected environment (UFRPE). Plantlets of the cultivar RB92579 were obtained by the technique of production of pre-sprouted plantlets. The protected environments were divided into four modules covered with low-density polyethylene plastic + photo-selective shade nets and one module without shade net. Micrometeorological data of global and photosynthetically active solar radiation, air temperature, substrate temperature, relative humidity and the solar radiation spectrum were recorded in each module. The experiment was conducted in a completely randomized design and the principal component analysis was used to verify the association between the cultivation modules, micrometeorological variables and crop variables. Anti-UV low-density polyethylene plastic + freshnet led to lower transmittance of global solar radiation, higher percentage of photosynthetically active radiation and lower plantlet mortality. Substrate temperature above 30.2 °C resulted in higher plantlet mortality. Larger spectrum in the red range led to the production of better quality plantlet. The use of freshnet shade net promoted adequate conditions for the cultivation of sugarcane plantlets and allows obtaining better quality plantlets.

A novel two-stage method of plant seedlings classification based on deep learning

2021 ◽  
pp. 1-11
Author(s):  
Tianhong Dai ◽  
Shijie Cong ◽  
Jianping Huang ◽  
Yanwen Zhang ◽  
Xinwang Huang ◽  
...  
Keyword(s):  
Deep Learning ◽  
Learning Technology ◽  
Two Stage ◽  
Second Stage ◽  
Stage Classification ◽  
Different Types ◽  
Two Stages ◽  
Plant Seedlings

In agricultural production, weed removal is an important part of crop cultivation, but inevitably, other plants compete with crops for nutrients. Only by identifying and removing weeds can the quality of the harvest be guaranteed. Therefore, the distinction between weeds and crops is particularly important. Recently, deep learning technology has also been applied to the field of botany, and achieved good results. Convolutional neural networks are widely used in deep learning because of their excellent classification effects. The purpose of this article is to find a new method of plant seedling classification. This method includes two stages: image segmentation and image classification. The first stage is to use the improved U-Net to segment the dataset, and the second stage is to use six classification networks to classify the seedlings of the segmented dataset. The dataset used for the experiment contained 12 different types of plants, namely, 3 crops and 9 weeds. The model was evaluated by the multi-class statistical analysis of accuracy, recall, precision, and F1-score. The results show that the two-stage classification method combining the improved U-Net segmentation network and the classification network was more conducive to the classification of plant seedlings, and the classification accuracy reaches 97.7%.

Method of experimental evaluation of the efficiency coefficient of vibration protection of the rope-rod coupling "MAMSAR+A" of the diesel generator set DGA-8.83

2021 ◽  
pp. 88-95
Author(s):  
М.А. Минасян ◽  
А.М. Минасян ◽  
Ц. Цзэн
Keyword(s):  
Experimental Evaluation ◽  
Vibration Isolation ◽  
Experimental Studies ◽  
Original Method ◽  
Efficiency Coefficient ◽  
Diesel Generator ◽  
Vibration Protection ◽  
Rigid Connection ◽  
Two Stages

Объектом исследования является опытный образец запатентованной канатностержневой муфты (КСМ) «MAMSAR+А» в качестве привода дизель-генераторного агрегата ДГА-8,83 мощностью 9,56 кВт при частоте вращения 1500 мин-1 с дизелем 2Ч 8,5/11 и генератором «ГК-5,6». Целью исследования является экспериментальная оценка коэффициента эффективности вибрационной защиты КСМ. Поставленная цель достигается разработкой и реализацией оригинальной методики экспериментальной оценки коэффициента эффективности КСМ с анализом и выводами результатов экспериментальных исследований. Экспериментальные исследования проводятся в два этапа. Первый этап – с упругим соединением КСМ, второй этап – с жестким соединением. Оригинальность методики экспериментальной оценки коэффициента эффективности вибрационной защиты КСМ главным образом заключается в том, что между двумя этапами экспериментальных исследований КСМ не демонтируется. Следовательно, качество центровки не нарушается. Усредненный коэффициент эффективности виброизоляции КСМ составляет от 3 до 8 дБ. The object of this research is a prototype of the patented wire rope coupling (KSM) "MAMSAR+A" as a drive for a diesel-generator unit DGA-8.83 with a power of 9.56 kW at a speed of 1500 min-1 with a 2CH 8.5/11 diesel engine and a generator "KG-5.6". The aim of the research is to experimentally evaluate the efficiency coefficient of vibration protection of the KSM. This goal is achieved by developing and implementing an original method for experimental evaluation the efficiency coefficient of the KSM with analysis and conclusions of the results of experimental studies. Experimental studies are conducted in two stages. The first stage - with an elastic connection of the coupling, the second stage - with a rigid connection. The originality of the method of experimental evaluation of the efficiency coefficient of vibration protection of the KSM mainly lies in the fact that the KSM is not dismantled between the two stages of experimental research. Therefore, the quality of alignment is not violated. The average coefficient of vibration isolation efficiency of the KSM is from 3 to 8 dB.

scholarly journals Pelayanan Prima Perawat Berdasarkan Persepsi Pasien di Ruang Rawat Inap Talaga Bodas (Penyakit Dalam Pria Kelas 3) Rumah Sakit Tingkat II 03.05.01 Dustira Cimahi 2019

2020 ◽  
Vol 5 (1) ◽  
pp. 42-46
Author(s):  
Lilis Rohayani ◽  
Iin Inayah ◽  
Anisa Shofiyani Shoumi ◽  
Andria Pragholapati
Keyword(s):  
Patient Satisfaction ◽  
Service Providers ◽  
Sampling Technique ◽  
Standard Operating Procedure ◽  
Total Sample ◽  
Service Excellence ◽  
Excellent Service ◽  
Questionnaire Method ◽  
Two Stages

ABSTRACT Excellent service is the attitude or way of service providers who play a major role in creating satisfaction for patients, so the hospital's effort to improve the quality of service and patient satisfaction is to implement service excellence. Factors that must be applied by nurses in providing excellent service, including abilities, attitudes, appearance, attention, action and accountability. This study aims to determine the description of excellent service nurses based on patient perceptions in the Talaga Bodas inpatient (Class 3 Male Disease) Kindergarten II Hospital 03.05.01 Dustira Cimahi City in 2019. The study design was an analytic survey. The total sample of 149 respondents using purposive sampling technique with inclusion and exclusion criteria. Data collection was performed using a Likert scale questionnaire method. Analysis of data through two stages, namely univariate to see the frequency distribution. The results showed as many as 80 respondents (53.7%) felt excellent service. It is recommended that each inpatient room has a standard operating procedure standard (SOP) so that all nurses know the steps - good steps to perform excellent service to increase patient satisfaction. Keyword: Service Excellent, Nurse Hospital

scholarly journals Inclusion and Integration of the Disabled into the Labor Market Against the Background of the New Regulations in Germany

Equilibrium ◽  
2013 ◽  
Vol 8 (3) ◽  
pp. 79-101
Author(s):  
Lilianna Jodkowska
Keyword(s):  
Labor Market ◽  
Quality Management System ◽  
The Third ◽  
The Social ◽  
The Disabled ◽  
Social Code ◽  
Two Stages ◽  
The Unemployed ◽  
New Criteria

The aim of the article is to present new regulations introduced by the Third Book of the Social Code in Germany that concern a reform of the labor market's active instruments gathered under the name "Instumentenreform".  One of the main objectives of the reform is to improve the quality of programs and projects that activate the unemployed, but also to make efforts to include in the labor market groups that have not been activated in such a way so far. One of such groups are the disabled trained and employed in Invalids' Cooperatives.  One of the further, and at the same time new, criteria for all organizations and institutions receiving and applying for funds to realize programs of the labor market and vocational trainings is the introduction and certification of the quality management system. The aim of the paper is to compare the activity of Invalids' Cooperatives in Poland and Germany. This aim will be carried out by analyzing the regulations and as far as possible the data available (the regulations became effective in two stages: in April 2012, and since 01.01.2013 onwards).  The findings of the article have been collected in the form of a description of the situation and forecast for 2013.

scholarly journals Saproxylic Diptera assemblages in a temperate deciduous forest: implications for community assembly

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e6027
Author(s):  
Julia J. Mlynarek ◽  
Amélie Grégoire Taillefer ◽  
Terry A. Wheeler
Keyword(s):  
Sugar Maple ◽  
Deciduous Forest ◽  
Temperate Deciduous Forest ◽  
Decay Stage ◽  
Old Growth Forest ◽  
Temperate Deciduous ◽  
Species Type ◽  
Temperate Deciduous Forests ◽  
Decaying Wood ◽  
Two Stages

Saproxylic insects, those associated directly or indirectly with decaying wood for all or part of their life cycle, compose a large proportion of forest organisms. Flies (Diptera) are often the most abundant and species-rich group of insects in forest microhabitats, yet most work to date on saproxylic insect diversity and ecology has focused on beetles (Coleoptera). We compared saproxylic Diptera assemblages reared from two tree species (sugar maple and American beech) at two stages of decay (early/young and advanced/old) for a total of 20 logs in an eastern Canadian Nearctic old-growth forest. We found that communities are distinct within both species type and decay stage of wood. Early decay stage wood is more variable in community composition than later decay stage; however, as the age of the decaying wood increases, the abundance of Diptera increases significantly. Most indicator species are discernible in later decay stage and wood type. We venture to suggest that stochastic and deterministic processes may play a role in driving Diptera communities in temperate deciduous forests. To retain the highest saproxylic Diptera diversity in a forest, a variety of decaying wood types at different stages of decomposition is necessary.

scholarly journals PENGEMBANGAN LEMBAR KERJA SISWA (LKS) BAHASA INDONESIA KELAS VII DENGAN MODEL PEMBELAJARAN BERBASIS MASALAH

EDU-KATA ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. 145-152
Author(s):  
Sri Rahayu
Keyword(s):  
Data Analysis ◽  
Product Quality ◽  
Development Process ◽  
Problem Based Learning ◽  
Learning Model ◽  
Design Development ◽  
Student Work ◽  
Two Stages ◽  
D Model

The research aimed to (1) describe the process of developing the Indonesian Student Workheet using Problem Based Learning Model, (2) show the quality of the Indonesian Student Work Sheet using Problem Based Learning Model, including: (a) the product quality of the Student Worksheet and (b) the using quality of the Student Worksheet. The type of the research was research and development using 4-D model, those are definition, design, development, and dissemination. The data collection used instrument of validation sheet from the expert, questionnaire sheet, observation sheet. The technique of data analysis divided into three, the technique of data analysis of student worksheet quality and the implementation of student work sheet using Problem Based Learning. The results showed that the development process consisted of two stages: (1) the analysis phase of the writer’s understanding about the Student Worksheet and it’s need, and (2) the design phase which produced the summaries of the materials in each basic competences. The product quality based on the expert gained the score in average of 72.48%, good, the using quality based on the questionnaires to the teacher and observation to the students gained the score in average of 75, 65, good.

scholarly journals Colorectal bradyarrhythmia syndrome as a predictor of metabolic syndrome

2020 ◽  
Vol 183 (11) ◽  
pp. 44-50
Author(s):  
K. A. Shemerovskii ◽  
V. N. Fedorets ◽  
P. V. Seliverstov ◽  
S. R. Bakaeva
Keyword(s):  
Metabolic Syndrome ◽  
Well Being ◽  
Medical Professionals ◽  
Early Prevention ◽  
The Third ◽  
The Metabolic Syndrome ◽  
Severe Stage ◽  
Order Of Magnitude ◽  
Two Stages

Evidence is presented for a significantly wider spread of the first two stages (mild and moderate) Colorectal Bradyarrhythmia Syndrome (CBS) compared with the third (severe — constipation) stage of this syndrome. Surveyed more than 2,500 medical professionals by the method of chronoenterographia. It was found that the incidence of mild CBS (about 60% of cases) and moderate stage of this syndrome (about 30% of cases) is almost an order of magnitude higher than the incidence of severe stage (about 10% of cases) of CBS. SCB has been shown to increase the risk of obesity by almost 3 times. It is shown that CBS contributes to a decrease in well-being, activity and mood, as well as a decrease in the quality of life. Screening for CBS and normalizing the circadian bowel rhythm with psyllium (mucofalc) in individuals who consider themselves healthy may contribute to early prevention of the risk of the metabolic syndrome.

Influence of maturity stage on in situ dry matter degradability of six maize varieties in fistulated sheep

2001 ◽  
Vol 2001 ◽  
pp. 89-89
Author(s):  
M. A. Akbar ◽  
P. Lebzien ◽  
G. Flachowsky
Keyword(s):  
Dry Matter ◽  
Nutritive Value ◽  
Climatic Conditions ◽  
Maturity Stage ◽  
Factors Affecting ◽  
Maize Varieties ◽  
Feed Value ◽  
Two Stages

The fresh weight, dry matter (DM) contents and nutritional quality in maize vary considerably with variation in varieties, stages at which harvested, climatic conditions and agronomic factors. Recently, agronomists, nutritionists, and dairy producers have placed increased emphasis on factors affecting the nutritive value of maize. However, very little information is available on quantitative variability of the feed value of maize fodder as affected by such factors. This study was, therefore, carried out to assess the effect of harvesting of six different maize varieties at two stages (dates) of grain maturity on quality of both the stover and cobs.

Sign in / Sign up

Export Citation Format

Share Document