scholarly journals Dendroclimatic Response Variability of Quercus species in the Romanian Intensive Forest Monitoring Network

2013 ◽  
Vol 41 (1) ◽  
pp. 326 ◽  
Author(s):  
Ionel POPA ◽  
Stefan LECA ◽  
Adam CRĂCIUNESCU ◽  
Cristian SIDOR ◽  
Ovidiu BADEA
Keyword(s):  
Correlation Coefficients ◽  
Monitoring Network ◽  
Point Of View ◽  
Forest Monitoring ◽  
Permanent Plots ◽  
Intensive Monitoring ◽  
Level Ii ◽  
Quercus Species ◽  
Level Of Significance ◽  
Broad Leaved Species

Oaks are among the most important broad-leaved species in Romanian forests from both an economic and socio-ecological point of view. A significant decline of these species has been observed, which was first evident in various studies and investigations followed by the more results of interdisciplinary research performed in intensive monitoring plots (level II) showing that the decline is climate induced. Thus, it is important to understand the climate change conditions and factors that influence Quercus spp. Typical dendroclimatological investigations were conducted on an intensive forest monitoring network based on four oak species (Q. robur, Q. petraea, Q.cerris, and Q. frainetto) in 7 permanent plots placed in southern Romania. Three patterns of climate-growth relationships were identified and discerned in accordance with the Quercus species. All oak species were found to have a positive correlation with the level of precipitation. In addition, the intensity and level of significance of correlation coefficients differ from one species to another and from one region to another.

scholarly journals The perception of COVID-19 among Italian dental patients: an orthodontic point of view

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Stefano Martina ◽  
Alessandra Amato ◽  
Paolo Faccioni ◽  
Alfredo Iandolo ◽  
Massimo Amato ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Point Of View ◽  
Dental Practice ◽  
Online Questionnaire ◽  
Chi Square ◽  
Dental Patients ◽  
Patient Health ◽  
Chi Square Test ◽  
Orthodontic Patients ◽  
Level Of Significance

Abstract Background The present study aimed to investigate the patients’ perception of the dental practice during the COVID-19 outbreak, and whether the pandemic will affect the attendance of orthodontic patients at the dental practice. An online questionnaire, including the Patient Health Questionnaire-4 (PHQ-4), was submitted to Italian dental patients with items about their perceived risks when going to the dentist, concerns about continuing orthodontic treatment, and the onset of temporomandibular disorders (TMD). Data were analyzed with a chi-square test and logistic regression analysis. The level of significance was set at P < 0.05. Results A total of 1566 subjects completed the survey, including 486 who were under orthodontic treatment or who had a child in orthodontic treatment. A total of 866 participants (55.3%) thought the risk of contracting the COVID-19 infection was higher in a dental practice; this perception was associated with gender (women more than man), age (over 60 years old) and high levels of distress (P<0.001). However, 894 patients (57.1%) felt comfortable going back to the dentist. Most of the orthodontic patients (84%) would continue their treatment. After the lockdown, there was a slight increase in the frequency of TMD pain (356 versus 334). Conclusions Most of the participants believed that the dental practice is a place at greater risk of contracting COVID-19, even if they continue to go to the dentist. Gender, age, and the level of distress were associated with the increase in the fear of going to the dentist due to COVID-19. Because of the pandemic, 16% of patients undergoing orthodontic treatment would not return to the dental practice to continue their orthodontic treatment after the lockdown. The prevalence of TMD pain in the population increased due to the pandemic.

scholarly journals Difficulties of Teaching Scientific Concepts among Basic Students from the Point of View of Science Teachers in Irbid Governorate: صعوبات تدريس المفاهيم العلمية لدى طلبة المرحلة الأساسية من وجهة نظر معلمي العلوم في محافظة إربد

2020 ◽  
Vol 4 (13) ◽  
Author(s):  
Hoda Atemah Al-Masry
Keyword(s):  
Science Teachers ◽  
Point Of View ◽  
Scientific Concepts ◽  
Curriculum Content ◽  
Educational Qualification ◽  
Basic Stage ◽  
Training Courses ◽  
Level Of Significance ◽  
The Impact

This study aimed to investigate the difficulties of teaching scientific concepts among students of the basic stage from the point of view of science teachers in Irbid governorate through applying to a sample of (56) teachers. And. A study tool has been developed consisting of (24) paragraphs, each of which represents one of the difficulties of learning the concept. The tool has been verified and verified. The study reached the following results: The difficulties of learning scientific concepts were moderate, and there were no statistically significant differences at the level of significance ( = 0.05) in the difficulties of learning scientific concepts from the point of view of science teachers attributed to the impact of sex and educational qualification. The researcher recommended a number of recommendations, the most important of which were: Reviewing the content of science books so that the number of scientific concepts contained in the curriculum content is reduced in order not to overwork the student by memorizing a large number of scientific concepts, and holding training courses for science teachers in order to train them on how to choose methods Appropriate teaching to teach scientific concepts.

scholarly journals The Effectiveness of Teaching Kids Athletics Program for Young Children in the Content of Physical Education Curricula in Sultanate of Oman from the point of view of Physical Education Teachers

2021 ◽  
Vol 33 (3) ◽  
pp. 16-25
Author(s):  
Majid AL Busafi ◽  
Samir bin Issa bin Muhammad Al-Sulaimi
Keyword(s):  
Physical Education ◽  
Young Children ◽  
Program Implementation ◽  
Point Of View ◽  
Physical Education Teachers ◽  
Years Of Experience ◽  
Sultanate Of Oman ◽  
Motor Abilities ◽  
Level Of Significance ◽  
Academic Qualifications

This study aimed to identify the effectiveness of teaching the athletics program for young children (Kids Athletics) in the content of school PE curricula for grades (1-4) in the Sultanate of Oman from the point of view of PE teachers. To achieve the objectives of the study, the researchers used the descriptive approach by applying a questionnaire to measure the effectiveness of teaching the athletics program for young children on a sample of (378) male and female teachers for grades (1-4) in different educational governorates. The study found that the degree of effectiveness of teaching the athletics program for young children (Kids Athletics) from the teachers’ point of view is very large, reaching (4.30) and that the degree of teachers’ awareness of the program is very large, reaching (4.20), and the responses of the sample members about the availability of program implementation requirements reached (3.81), and there were no statistical differences at the level of significance (α = 0.05) between the arithmetic averages of teachers' responses to the effectiveness of teaching the program and teachers' awareness about the program according to academic qualifications and years of experience for teachers due to the variables of academic qualifications and years of experience for teachers. In light of the results of the study, the researchers recommend the importance of including the athletics program for youngsters (Kids Athletics)  in the curricula of the fifth and sixth grades of the school PE subject due to its importance and contribution to achieving the objectives of the subject and developing motor abilities, and the need to continue in the qualifying and training programs to develop the capabilities of PE teachers in teaching the program and to ensure that schools are equipped with the necessary equipment to teach the suggested program, and provide the requirements for its implementation within the academic units of the curriculum.

scholarly journals Study of Temporal Correlations in the Urban Noise Monitoring Network of Milan, Italy

2020 ◽  
Vol 14 ◽  
Keyword(s):  
Low Cost ◽  
Traffic Noise ◽  
Flow Characteristics ◽  
Correlation Coefficients ◽  
Monitoring Network ◽  
Life Project ◽  
Temporal Correlations ◽  
Noise Data ◽  
Extended Area ◽  
Arbitrary Location

The European Life project, called DYNAMAP, has been devoted to provide a realimage of the noise generated by vehicular trafficin urban and suburban areas, developing a dynamic acoustic map based on a limited numberof low-cost permanent noise monitoring stations.In the urban area of Milan, the system has beenimplemented over the pilot area named Area 9.Traffic noise data, collected by the monitoringstations, each one representative of a numberof roads with similar characteristics (e.g. dailytraffic flow), are used to build-up a “real time”noise map. DYNAMAP has a statistical structure and this implies that information capturedby each sensor must be representative of an extended area, thus uncorrelated from other stations. The study of the correlations among thesensors represents a key-point in designing themonitoring network. Another important aspectregards the “contemporaneity” of noise fluctuations predicted by DYNAMAP with those effectively measured at an arbitrary location. Integration times heavily affect the result, with correlation coefficients up to 0.8-0.9 for updating timesof 1h. Higher correlations are observed when averaging over groups of roads with similar traffic flow characteristics

scholarly journals Survival analysis of orange tree varieties in Spain

2019 ◽  
Vol 17 (1) ◽  
pp. e0103 ◽  
Author(s):  
Francisco Alcon ◽  
M. Angeles Fernández-Zamudio ◽  
Erasmo I. López-Becerra ◽  
M. Dolores De-Miguel
Keyword(s):  
Survival Analysis ◽  
Frost Resistance ◽  
Fruit Fly ◽  
Duration Analysis ◽  
Point Of View ◽  
The Other ◽  
Optimal Result ◽  
Large Size ◽  
Analysis Technique ◽  
Level Of Significance

The fundamental basis of Spanish citriculture is its varietal composition, which contributes to the existence of a marketing calendar that extends to almost the entire year. As time goes by, the supply of varieties is continuously renewed, requiring significant investments by growers. The guarantee of a quality supply to the markets, on one hand, and the optimal result of the investments made, on the other, require that, in managing the sector, the characteristics determining the survival of the varieties be taken into account. The main purpose of this study was therefore to assess the influence of the attributes affecting the longevity of orange plantations from a technical and commercial point of view. The duration analysis technique applied to the different varieties has been used. The main attributes determining the elimination of a variety were the presence of seeds in the fruit and the tendency towards a decrease in surface size. Permanence- or survival-friendly attributes included the calibre (large size of the variety, within its group) and the price received by farmers. Precocity, frost resistance, commercial quality and resistance to fruit fly did not have the expected level of significance.

scholarly journals Evaluating the muscular strength, functional capacity, and risk of sarcopenia in elderly women who practice Mat Pilates

2019 ◽  
Vol 32 ◽  
Author(s):  
Daniel Vicentini de Oliveira ◽  
Amanda Mansano de Souza ◽  
Áurea Gonçalves Ferreira ◽  
Mateus Dias Antunes ◽  
Natália Serra Lovato ◽  
...  
Keyword(s):  
Latin American ◽  
Functional Capacity ◽  
Muscular Strength ◽  
Elderly Women ◽  
Rank Correlation ◽  
Correlation Coefficients ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Spearman’S Rank Correlation ◽  
Level Of Significance

Abstract Introduction: Despite the importance of appropriate levels of muscular strength to maintain the functional capacity and a healthy life in old age, the current literature still lacks studies that investigate the profile of elderly women who practice Mat Pilates regarding these variables. Objective: This study aimed to analyze muscular strength, functional capacity, and risk of sarcopenia in elderly women who practiced Mat Pilates. Method: This is a cross-sectional study carried out with 50 elderly women who practice Mat Pilates in the city of Maringá, Paraná. Sociodemographic and health questionnaires were used, in addition to tests created by a Latin American development group for maturity called Grupo de Desenvolvimento Latino Americano para a Maturidade (GDLAM), sitting-rising test, arm curl test, and SARC-F questionnaire. For data analysis, Shapiro-Wilk and Mann-Whitney U tests, as well as Spearman’s Rank Correlation Coefficients, were used. The level of significance was p < 0.05. Results: The 70-79-year-old elderly women showed worse results in the functional capacity and muscular strength tests of the upper limbs and a higher risk of sarcopenia than the individuals who were under 70 years of age. Muscular strength was inversely related to the reduction of the risk of sarcopenia, and functional capacity was directly associated with this risk. Conclusion: A good functional capacity seems to be related to the reduction of the risk of sarcopenia. Age seems to be an intervening factor for reducing muscular strength levels and functional capacity and increasing the risk of sarcopenia.

Delineating monitoring Network in Biodiversity Hotspot based on Land Surface Phenology. The case of Tropical Montane Cloud Forest

2020 ◽  
Author(s):  
David Aragones ◽  
Victor F. Rodriguez-Galiano ◽  
Jose A. Caparros-Santiago ◽  
Marco A. Espinoza-Guzman
Keyword(s):  
Land Surface ◽  
Multiple Scales ◽  
Cloud Forest ◽  
Monitoring Network ◽  
Habitat Destruction ◽  
Forest Monitoring ◽  
Tropical Montane Cloud Forest ◽  
Plant Biodiversity ◽  
Land Surface Phenology ◽  
Montane Cloud Forest

&lt;p&gt;Land Surface Phenology (LSP) is the study of the phenology through satellite sensors. It integrates phenological patterns (mainly spatial) and processes (mainly temporal) within heterogeneous biophysical environments across multiple scales. It is a very useful tool for the characterization and monitoring of forests. Tropical montane cloud forest is the most diverse type of vegetation per unit area, since it occupies less than 1% of Mexico but harbours 10% of the country&amp;#8217;s plant biodiversity. It is a critical priority for biodiversity conservation, its permanence in the medium and long term is threatened by habitat destruction and climate change. A regional conservation approach, which values all fragments of this type of forest as contributing to regional biodiversity, will be required to conserve plant biodiversity in central Veracruz. This area is one of the Rare forest ecoregions within biodiversity hotspots. Our primary aim was to identify priority zones for stablishing a Tropical montane cloud forest monitoring network in Central Veracruz based on its phenological responses at multiples scales. Our methodology can be applied in other tropical biodiversity zones, even in the absence of adequate cartography. We start from homogeneous and reliable pixels and automatically calculate the number of pheno-regions that exist within this type of vegetation in the study area, based on different LSP pheno-metrics extracted from different MODIS vegetation index time-series (NDVI &amp; EVI) with Timesat and BFAST algorithm. We extract Fraction cover subpixels homogeneus from MODIS and Sentinel 2 LC map with Random Forest classification and success rate analysis curve ensures the reliability of the LC map. We identify 4 statistically different representative pheno-regions through cluster analysis in this type of forest within the study area and we obtained 351 priority areas where a phenological monitoring network could be located.&lt;/p&gt;

Welchen Zusammenhang zwischen Preis und Qualität sollte der Wettbewerb auf Konsumgütermärkten herstellen? / Which Price-Quality Relationship Should Competition Induce on Consumer Goods Markets ?

2009 ◽  
Vol 229 (4) ◽  
Author(s):  
Heiner Imkamp
Keyword(s):  
Product Quality ◽  
Consumer Goods ◽  
Correlation Coefficients ◽  
Point Of View ◽  
Price Formation ◽  
Consumer Economics ◽  
Objective Quality ◽  
Product Choices ◽  
Positive Coefficients ◽  
Valid Information

SummaryNot only that consumers take it often for granted that product prices are good indicators of product quality, but also many experts in consumer economics expect a high positive price-quality relationship. However, for more than 50 years numerous studies in more than 10 countries all over the world have shown low price-quality correlation coefficients, mostly close to 0.2. These results have been interpreted twofold: (a) consumers cannot use prices as valid indicators of quality and (b) markets do not function well. In contrast to the second interpretation, this paper argues that, according to the economic theory of price formation, prices are not an indicator of quality, but an indicator of scarcity. This allows the conclusion that workable consumer goods markets, as seen from a welfare point of view, should be characterized by low or even negative correlations between price and objective quality rather than by strong positive coefficients. All the more it is the availability of valid information about product quality which is necessary to enable consumers to avoid inefficient product choices.

scholarly journals The Uptake of Nickel-Titanium Rotary Files in Saudi Arabia

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Emad AlShwaimi
Keyword(s):  
Developing Countries ◽  
Saudi Arabia ◽  
North America ◽  
Root Canal ◽  
Overall Response Rate ◽  
Response Rate ◽  
Correlation Coefficients ◽  
Nickel Titanium ◽  
Level Of Significance ◽  
General Dentists

Aim. We surveyed the uptake of nickel-titanium rotary files (NTRFs) among all dentists in Saudi Arabia.Methodology. A questionnaire encompassing endodontic performance and NTRF uptake was e-mailed to all members of the Saudi Dental Society. Data were collected from participants during a three-month period and were analyzed usingχ2tests and correlation coefficients. Level of significance was set atP=0.05.Results. The overall response rate was 30.6% (n=490), and 82.9% were found to perform root canal treatment (RCT). Among the 406 RCT performers, general dentists formed the bulk (45%). Among endodontists, 91.5% were using NTRF (P<0.001). Those who graduated between 1991 and 2000 used NTRF more than any other group did (78.4%,P=0.05). Graduates from Europe and Australia used NTRF most frequently (100%,P=0.001), followed by those from North America (87%,P=0.001), and finally by Saudi Arabian graduates (68.7%). Male respondents performed more endodontic procedures and used NTRF significantly more often than female respondents did (males: 73%; females: 56.2%) (P=0.001). The most significant reasons for not using NTRF were “unavailability” (64.7%,P≤0.05) and “lack of experience” (54.1%,P≤0.001).Conclusions. We found that NTRF usage was not as widespread in Saudi Arabia as in other developing countries. Therefore, we suggest an improved implementation of NTRF in undergraduate and postgraduate curriculums and the provision of educational courses with a greater focus on this development.

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