scholarly journals Wood hydraulic characteristics of pioneers/early secondary and non-pioneer species

2021 ◽  
Vol 14 (7) ◽  
pp. 45-52
Author(s):  
Ana Tereza Durão Galão ◽  
Diego Romeiro ◽  
Luís Alberto Bucci ◽  
Guillermo Angeles ◽  
Eduardo Luiz Longui
Keyword(s):  
Regression Analysis ◽  
Hydraulic Conductivity ◽  
Moisture Content ◽  
Wood Density ◽  
The Other ◽  
Pioneer Species ◽  
Hydraulic Characteristics ◽  
Cariniana Legalis ◽  
Guazuma Ulmifolia ◽  
The Relationship

We aimed to determine any differences in hydraulic conductivity between pioneer species/early secondary and non-pioneers. To make this determination, we measured maximum vessel length (Mvl), specific hydraulic conductivity (Ks), percentage of embolized vessels (Pev), leaf hydraulic conductivity (Kl) and wood density at equilibrium moisture content-12% (Wd12). The pioneer/early secondary species we examined were Guazuma ulmifolia, Inga marginata and Maclura tinctoria. The non-pioneers we examined were Paubrasilia echinata, Cariniana legalis and Myroxylon peruiferum. The results were submitted to statistical analyses, including multiple comparison tests and t test, to verify differences between successional groups and regression analysis to verify the relationship between Ks and the other variables. Pioneer species had higher Ks than non-pioneers. Non-pioneers had a higher percentage of embolized vessels and wood density. Successional groups did not differ in Mvl, which is positively related to hydraulic conductivity in both successional groups since the percentage of embolized vessels was related negatively. Wood density is positively related to Ks in non-pioneer species, while a negative correlation was observed between Ks and Kl in the pioneer species.

The relationship between fall dormancy and germplasm source in North American alfalfa cultivars

1996 ◽  
Vol 76 (3) ◽  
pp. 429-433 ◽  
Author(s):  
D. T. Fairey ◽  
N. A. Fairey ◽  
L. P. Lefkovitch
Keyword(s):  
Genetic Diversity ◽  
Regression Analysis ◽  
Plant Height ◽  
North American ◽  
The Other ◽  
Regression Coefficients ◽  
Large Contribution ◽  
Partial Regression ◽  
Fall Dormancy ◽  
The Relationship

Most of the genetic diversity of North American alfalfa cultivars has been accounted for by nine germplasm sources listed in descending order of winter hardiness as follows: Medicago sativa ssp. falcata, Ladak, M. sativa ssp. xvaria, Turkistan, Flemish, Chilean, Peruvian, Indian and African. In most instances, the breeder assigns a fall dormancy score and the relative proportions of each of the nine germplasm source for each cultivar at registration. The fall dormancy score (1 = dormant to 9 = non-dormant), determined by measuring plant height in October after harvest in early September, is used to indicate cultivar adaptation for different regions. This study examines the relationship between germplasm composition and plant height, the equivalence of fall dormancy. The signs on the partial regression coefficients of a multiple regression analysis of plant height on the proportional content of the nine sources of germplasm showed that the fall dormancy fell essentially into two classes, namely, a dormant category, comprising cultivars containing a large contribution of Falcata and Ladak, and a non-dormant category, in which Indian and African germplasm predominate. This does not necessarily preclude the influence of any of the other germplasm sources on fall dormancy, since they represent a rich source of diversity. However, nine distinct classes were not recognisable, perhaps because of the lack of an exact equivalence between fall dormancy class and plant height of the fall regrowth. Since these observations have not been derived in a common nursery, the latitude and latitude × cultivar effects have been disregarded. These limitations should be recognized when using the currently assigned fall dormancy ratings to predict cultivar adaptation. Key words: Alfalfa, fall dormancy, sources of germplasm

scholarly journals ANALISA VARIABEL-VARIABEL YANG MEMPENGARUHI PROFITABILITY NET MARGIN

2018 ◽  
Vol 11 (1) ◽  
Author(s):  
Dra. Rr. Sri Diniarti, S.E.
Keyword(s):  
Regression Analysis ◽  
Correlation Analysis ◽  
Multiple Regression Analysis ◽  
Positive Relationship ◽  
Negative Relationship ◽  
Field Research ◽  
The Other ◽  
Coefficient Of Determination ◽  
Net Margin ◽  
The Relationship

This research is an explanatory research, because it explaining about the relationship among the hypnotized variables. This research aims to knowing about the relationship and the influence between the accounts, location to the other bank, and loans to the net margin in Bank Jatim Madiun. The results are between accounts to net margin has positive relationship, between location to another bank to net margin has negative relationship, and between loans to net margin has positive relationship. Together, the variables have strong enough relationship to net margin, it showing by coefficient of determination value is 0,956, it means that the value close to 1. So, 4,4% of Profitability Net Margin influenced by the others variables.The method of research was by using field research that including observation, interview and library research.The analyzing data method was by using Multiple Regression Analysis, Correlation Analysis, and Coefficient of Determination Analysis.

scholarly journals Diversity and distribution of testate amoebae (Amoebozoa, Rhizaria) in reservoirs, Northeastern Bulgaria

2018 ◽  
Vol 5 (2) ◽  
pp. 90-99
Author(s):  
Rositsa Davidova ◽  
Senay Sevginov
Keyword(s):  
Regression Analysis ◽  
Species Richness ◽  
Diversity Index ◽  
Taxonomic Diversity ◽  
Testate Amoebae ◽  
The Other ◽  
Water Volume ◽  
Species Richness And Abundance ◽  
Relationship Of ◽  
The Relationship

Abstract The aim of the study is to describe the testate amoebae fauna in seven reservoirs in the Northeastern Bulgaria and to investigate the relationship of taxonomic diversity and abundance of these organisms to the some characteristics of the reservoirs. A total of 52 species, varieties and forms belonging to 15 genera were identified in the benthal of the coastal zone. There are significant differences in species richness and abundance between the testacea of different reservoirs. Number of taxa was significantly higher in the Beli Lom (29 species and 12 genera) and Loznitsa (22 species and 13 genera). Most of the reservoirs - Kara Michal, Bogdantsi, Isperih, Lipnik and Brestovene have extremely poor fauna compared to other similar reservoirs. This is confirmed by the low values of the Shannon-Weaver diversity index, which varied between 1.04 and 2.396, as well as by the other indices used to assess the environmental conditions in the reservoirs. The data of the regression analysis showed that a relation between age, surface area and water volume of the reservoirs and the species richness and abundance of testacea is not established.

scholarly journals The Virtuous Circle of Intellectual Capital and Corporate Environmentalism: Evidence from the Food Industry

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Eugenio D’Angelo ◽  
Francesco Gangi ◽  
Lucia Michela Daniele ◽  
Nicola Varrone
Keyword(s):  
Regression Analysis ◽  
Intellectual Capital ◽  
Time Horizon ◽  
Food Industry ◽  
The Other ◽  
Corporate Environmentalism ◽  
Ols Regression ◽  
Environmental Commitment ◽  
Managerial Implications ◽  
The Relationship

The purpose of this paper is to address the relationship between intellectual capital and corporate environmentalism, assuming that intellectual capital may be an important precondition to foster environmental commitment and that, on the other side, corporate environmentalism may positively determine the level of intellectual capital in a reciprocal and virtuous circle. To address this topic, we conducted two OLS regression analysis on a worldwide sample of 235 firms operating in the food industry, over an eight years’ time horizon (2010-2017), with 1,686 firm-year observations gathered from Asset-4ESG and Worldscope. Results confirm our hypotheses thus providing important theoretical and managerial implications.

scholarly journals Relationship between Water Activity and Moisture Content in Floral Honey

Foods ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 30 ◽  
Author(s):  
Chiachung Chen
Keyword(s):  
Regression Analysis ◽  
Moisture Content ◽  
Linear Equation ◽  
Water Activity ◽  
T Test ◽  
Regression Equations ◽  
Collection Site ◽  
Factors Affecting ◽  
Regression Parameters ◽  
The Relationship

The water activity (Aw) and moisture content (MC) data of floral honey at five temperatures were determined using the Aw method and it was found that temperature significantly affected the Aw/MC data. The linear equation could be used to express the relationship between Aw and MC of honeys. The empirical regression equations between parameters and temperature were established. To evaluate the factors affecting the Aw/MC data, we used categorical tests of regression analysis to assess the effect of the correlation between Aw and MC of honey and examined the factors affecting the regression parameters. Six datasets from five countries were selected from the literature. The significance of the levels of qualitative categories was tested by t-test. The slope of the relationship between Aw and MC was affected by the state of honey (liquid and crystallized). The intercepts were significantly affected by honey type (flower or honeydew), harvesting year, geographical collection site, botanical source and other factors. The outliers in the datasets significantly affected the results. With modern regression analysis, useful information on the correlation between Aw and MC could be found. The results indicated that no universal linear equation for Aw and MC could be used. The Aw value could be used as a criterion for the honey industry; then, the MC of honey could be calculated by the specific linear equation between Aw and MC.

scholarly journals The Effect of Teachers’ Spirituality and Ethical Ideology on Their Preference of Reporting Wrongdoings at Schools

2016 ◽  
Vol 9 (5) ◽  
pp. 85
Author(s):  
Asiye TOKER GOKCE
Keyword(s):  
Regression Analysis ◽  
Correlation Matrix ◽  
Positive Relationship ◽  
Descriptive Statistics ◽  
The Other ◽  
Ethical Ideology ◽  
Negatively Associated ◽  
Individual Level ◽  
Internal Whistleblowing ◽  
The Relationship

<p class="apa">This paper aimed to examine whistleblowing in point of individual level. Three sets of hypotheses were developed concerning the relationships between (1) religiosity and ethical ideology, (2) ethical ideology and intentions to different modes of whistleblowing, and (3) religiosity and intentions to different modes of whistleblowing. Descriptive statistics, Correlation matrix, and regression analysis were used to analyze the data. The sample includes 323 teachers in Turkey. The results confirmed that religiosity was negatively associated with relativism, and positively associated with idealism while they rejected any relation between the ethical ideology and intention to whistleblowing modes. The results confirmed only the positive relationship between religiosity and internal whistleblowing, while rejecting the other hypotheses. Few studies have investigated the relationship between whistleblowing modes and ethical ideology. Therefore, examining religiosity, ethical ideology, and whistleblowing in an education context in Turkey, this paper believed to contribute the literature with regard to Islamic perspective.</p>

scholarly journals On the relationship between regression analysis and mathematical programming

2004 ◽  
Vol 8 (2) ◽  
pp. 131-140 ◽  
Author(s):  
Dong Qian Wang ◽  
Stefanka Chukova ◽  
C. D. Lai
Keyword(s):  
Regression Analysis ◽  
Mathematical Programming ◽  
Quadratic Programming ◽  
Operations Research ◽  
Optimization Problems ◽  
The Other ◽  
Linear Quadratic ◽  
Quadratic Programming Problems ◽  
Simplex Methods ◽  
The Relationship

The interaction between linear, quadratic programming and regression analysis are explored by both statistical and operations research methods. Estimation and optimization problems are formulated in two different ways: on one hand linear and quadratic programming problems are formulated and solved by statistical methods, and on the other hand the solution of the linear regression model with constraints makes use of the simplex methods of linear or quadratic programming. Examples are given to illustrate the ideas.

scholarly journals Investigating the Relationship between Organizational Psychological Capital and Meaning in the Employees’work (Shahid Beheshti University as a Case Study)

2013 ◽  
Vol 3 (2) ◽  
pp. 42 ◽  
Author(s):  
Soheila Mehrabi ◽  
Hasan Babri ◽  
Mohammed Frohar ◽  
Bita Khabazuan ◽  
Sarvenaze Salili
Keyword(s):  
Regression Analysis ◽  
Psychological Capital ◽  
Meaning Making ◽  
The Other ◽  
Positive Relationships ◽  
Statistical Population ◽  
Meaning In Work ◽  
Positive Meaning ◽  
The Relationship

The purpose of this study is to examine the relationship between psychological capital and meaning in work among the employees of Shahid Beheshti University. The statistical population of this study includes all of the employees that were working in Shahid Beheshti University in 2011 and then a sample of 103 employees was selected from them randomly. In order to collect the data, two standard questionnaires were used. These include the questionnaire of psychological capital that was developed by Lotanz et al. in 2077 and the questionnaire of meaning that is developed by Stager et al. in 2010. The results of this study indicate that there are significant positive relationships among the components of psychological capital (including self-efficiency, optimism, hopefulness, and flexibility) and the components of meaning in work (positive meaning, meaning-making through work, and creating good motivations). On the other hand, the results of regression analysis indicate that two components of psychological capital (including self-efficiency and hopefulness) have more predictability of meaning in work. Keywords: psychological capital, meaning in work, employees

scholarly journals Estimation on migration characteristics of leachate using analysis of hydraulic conductivity at bioreactor landfill

2019 ◽  
Vol 38 (1) ◽  
pp. 59-68
Author(s):  
Hyeong-Jin Choi ◽  
Yong Choi ◽  
Seung-Whee Rhee
Keyword(s):  
Hydraulic Conductivity ◽  
Moisture Content ◽  
Bulk Density ◽  
Recirculation Zone ◽  
Migration Time ◽  
Bioreactor Landfill ◽  
Leachate Recirculation ◽  
Factors Affecting ◽  
Recirculation Zones ◽  
The Relationship

In bioreactor landfill, moisture content is one of the most important factors affecting the migration of leachate. The migration characteristics of leachate in the Sudokwon landfill site was estimated by examining relationships among self-loading weight of waste (waste weight load), bulk density, hydraulic conductivity and moisture content of the landfilled waste. Experimental zones in the Sudokwon landfill were divided into leachate recirculation zones (3-C and 4-C zone) and reference zone (3-D zone). The volume of the leachate recirculation was 207 m3 d-1 for 12 months in the 3-C zone and 190 m3 d-1 for 3 months in the 4-C zone. A logarithmic graph can describe the relationship between waste weight load and bulk density by moisture content. However, both the relationship between bulk density and hydraulic conductivity and the relationship between hydraulic conductivity and waste weight load can be expressed by an exponential graph. Through these relationships, generalised equations for hydraulic conductivity were established using moisture content and waste weight load. The hydraulic conductivity calculated from the generalised equation in the leachate recirculation zone was estimated to be 6.27 × 10-4 cm s-1 in the 3-C zone and 4.43 × 10-4 cm s-1 in the 4-C zone. The migration time of leachate in the leachate recirculation zone was estimated to be 64.2 days in the 3-C zone and 94.5 days in the 4-C zone, respectively.

Topic-marking prepositions in Swedish: A corpus-based analysis of adpositional synonymy

2014 ◽  
Vol 37 (2) ◽  
pp. 257-296 ◽  
Author(s):  
Anton Granvik ◽  
Susanna Taimitarha
Keyword(s):  
Logistic Regression ◽  
Regression Analysis ◽  
Multinomial Logistic Regression ◽  
Initial Position ◽  
The Other ◽  
Data Set ◽  
Multinomial Logistic Regression Analysis ◽  
Usage Patterns ◽  
Head Element ◽  
The Relationship

This study analyses the relationship between four near-synonymous Swedish prepositions, namely angående, beträffande, gällande and rörande, which are used to establish what we call a topic-marking relation, as in statens avtal angående finansieringen ‘the agreement of the state regarding the financing’. By focusing on a single, loosely defined genre consisting of the written texts included in the Swedish PAROLE corpus, we address the question of what differences there are among these four prepositions, which intuitively seem highly similar and mutually interchangeable. In order to find out which contextual and grammatical factors might influence the choice of one preposition over the others, two complementary analyses were performed. First, a so-called collostructional analysis (see Stefanowitsch & Gries 2003, Gries & Stefanowitsch 2004) was performed on 791 cases of these prepositions found in the PAROLE corpus. Secondly, the corpus examples were annotated according to ten syntactic and four semantic criteria and a multinomial logistic regression analysis was performed on the annotated data set. The results show some tendencies pointing to differing usage patterns of the four prepositions. Beträffande stands out as the most frequent of them all and is also preferably used when no explicit head element is present, typically in sentence-initial position. Angående prefers words of communication while rörande is used when another topic-marking preposition is also present. On the other hand, neither of the two analyses leads to a clear distinction among the four prepositions, thus pointing to the fact that these topic-marking prepositions indeed constitute a fairly good case of adpositional synonymy, with few distinguishing factors separating one from the other.

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