scholarly journals URBAN FOREST COMPONENTS INFLUENCING MICROCLIMATE AND COOLING POTENTIAL1

2017 ◽  
Vol 41 (6) ◽  
Author(s):  
Angeline Martini ◽  
Daniela Biondi ◽  
Antonio Carlos Batista
Keyword(s):  
Relative Humidity ◽  
Fixed Points ◽  
Strong Correlation ◽  
Urban Forest ◽  
Climatic Conditions ◽  
Tree Density ◽  
Cooling Effect ◽  
Different Types ◽  
Number Of Individuals

ABSTRACT Planting areas with arboreal vegetation has been proposed as a way to improve the climatic conditions of cities. However, it is not yet known which components of urban forest provide more satisfactory effects. The main goal of this study was to determine which components of the landscape provide greater influence on the microclimate and the cooling potential of the urban forest. For this, areas of different types of urban forest were selected. Using the fixed points method, the microclimate of the areas was analyzed, and by means of mobile transects walking a route of 500 m in an adjacent street, it was possible to analyze the influence in the immediate environment, determining the potential of cooling. The results indicated that the number of individuals and the tree density of the areas showed a statistically strong correlation with the temperature and relative humidity values, as well as with the cooling potential. In addition, it was found that 70% of the influence that the urban forest provides on the immediate surroundings can be explained by the number of trees. It is concluded that the number and density of individuals were the components of urban forest typologies that exerted greater influence on the microclimate, as well as on the cooling effect.

scholarly journals Experimental Campaign and Analysis on Double-Shear Wooden Connections

2018 ◽  
Vol 14 (3) ◽  
pp. 1-10
Author(s):  
Ioana Teodorescu
Keyword(s):  
Relative Humidity ◽  
Wood Properties ◽  
Climatic Conditions ◽  
Experimental Results ◽  
Building Conditions ◽  
Double Shear ◽  
Experimental Campaign ◽  
Different Types ◽  
Wooden Sample

Abstract The presence of water in wooden elements is very important because it represents the key in the determination of the resistances of a wooden sample. The influences of the environmental conditions like temperature, relative humidity, wind, rain are constantly changing wood properties. The paper presents the different types of water that are found in a wooden piece together with experimental results on the displacement of double-shear wooden connections with wooden dowels that have been modified in two pre-established environments. The moisture content has been changed from 12% natural moisture of wood in normal building conditions to 8% and 16% for wood that is found in different climatic conditions. The experimental results are then compared with numerical calculations from the international standard Eurocode 5.

Fire regime shift linked to increased forest density in a piñon–juniper savanna landscape

2014 ◽  
Vol 23 (2) ◽  
pp. 234 ◽  
Author(s):  
Ellis Q. Margolis
Keyword(s):  
Regime Shift ◽  
Fire History ◽  
Fire Regime ◽  
Fire Regimes ◽  
Fire Frequency ◽  
Climatic Conditions ◽  
Tree Density ◽  
High Severity ◽  
Wide Range ◽  
In Fire

Piñon–juniper (PJ) fire regimes are generally characterised as infrequent high-severity. However, PJ ecosystems vary across a large geographic and bio-climatic range and little is known about one of the principal PJ functional types, PJ savannas. It is logical that (1) grass in PJ savannas could support frequent, low-severity fire and (2) exclusion of frequent fire could explain increased tree density in PJ savannas. To assess these hypotheses I used dendroecological methods to reconstruct fire history and forest structure in a PJ-dominated savanna. Evidence of high-severity fire was not observed. From 112 fire-scarred trees I reconstructed 87 fire years (1547–1899). Mean fire interval was 7.8 years for fires recorded at ≥2 sites. Tree establishment was negatively correlated with fire frequency (r=–0.74) and peak PJ establishment was synchronous with dry (unfavourable) conditions and a regime shift (decline) in fire frequency in the late 1800s. The collapse of the grass-fuelled, frequent, surface fire regime in this PJ savanna was likely the primary driver of current high tree density (mean=881treesha–1) that is >600% of the historical estimate. Variability in bio-climatic conditions likely drive variability in fire regimes across the wide range of PJ ecosystems.

scholarly journals The effect of cooling irrigation on the blooming dynamic of plum

2010 ◽  
Vol 16 (4) ◽  
Author(s):  
L. Lakatos ◽  
I. Gonda ◽  
M. Soltész ◽  
Z. Szabó ◽  
J. Nyéki
Keyword(s):  
Relative Humidity ◽  
Frost Damage ◽  
Relative Effect ◽  
Climatic Conditions ◽  
Water Requirement ◽  
Control Plot ◽  
Logistic Curve ◽  
Treated Plot

The objective of the present study is to explore the effect of cooling irrigation (aspersion) on the beginning of bloom and on the micro-climate of the plantation. The results show that the water sprayed in the orchard by micro-jet influenced decisively the temperature of the plantation. At higher temperatures (around 20 °C), the drop of temperature may attain 5–7 °C. A low relative humidity of the air may increase the relative effect, The frequent repetition (20 minute intervals) may keep the temperature low also in the buds. The beginning of bloom may delayed for more than ten days. The dynamics of blooming was characterised by a logistic curve in the treated as well as in the control plot. In the treated plot, the curve was steeper than in the control in spite of equal temperatures measured in the plots. Under our (Hungarian) climatic conditions, the method is successfully used to delay blooming dates. The main result is the diminution of the frost damage in the spring and the security of yield. The costs and water requirement should be calculated later.

scholarly journals Efektivitas Komunikasi Dakwah Di Pesantren MQ dalam Merubah Akhlak Santri

2019 ◽  
Vol 1 (2) ◽  
pp. 21-36
Author(s):  
Agus Sudiansyah
Keyword(s):  
Quantitative Study ◽  
Strong Correlation ◽  
Boarding School ◽  
Effective Communication ◽  
Educational Institutions ◽  
Different Types ◽  
R Value ◽  
Simultaneous Influence

Indonesia has different types of educational institutions including a state owned institution and a private one. However, recently, several types of educational institutions in Indonesia have some attention from the society in terms of the development of behavioral character of the youth that tend to be degrading. Effective communication of dakwah(preaching) at Pesantren MQ Tebuireng (MQ Tebuireng Islamic Boarding School) as well as akhlak(behavior) education is believed to be able to improve the behavior or so called akhlak of the Indonesian youth to be better. It can be seen from this study, a study at Pesantren MQ Tebuireng aimed at finding the influence and correlation between the effectivity of communication of dakwah and akhlak education towards students. This study is a Quantitative study. The data in this study are obtained through survey using a proportional stratification sample tehnique towards 172 students at Pesantren MQ Tebuireng. The study shows that there is a simultaneous influence between an effective communication of dakwah and akhlak education towards students where Fcount of 18.009 > Ftable  of 3.05. However, there is also a correlation with r value of .749. According to Priyato, the r value of .60 - .799 shows a strong correlation, i.e. between the effectivity of communication of dakwah and akhlak education towards students. Indonesia memilki bebearapa lembaga pendidikan, yakni lembaga pendidikan milik pemerintah dan lembaga milik per orangan, sedangkan sekarang beberapa  lembaga pendidikan di Indonesia mendapat sorotan dari masyarakat mengenai pengembangan karakter tingkah laku generasinya yang mulai menurun. Komunikasi dakwah yang efektif di Pesantren MQ Tebuireung dan pembinaan akhlak  diyakini dapat meningkatkan tingkah laku atau akhlak generasi di Indonesia menjadi lebih baik. Terbukti hasil penelitian di Pesantren MQ Tebuireung dengan tujuan ingin mengetahui pengaruh dan hubungan  efektivitas komunikasi dakwah dan pembinaan akhlak terhadap akhlak santri. Penelitian ini merupakan penelitian Kuantitatif. Data dikumpulkan melaui survei dengan teknik sampel stratifikasi proporsional terhadap santri di Pesantren MQ Tebuirung berjumlah 172 santri. Hasil penelitian menunjukan terdapat pengaruh secara simultan dengan F Hitung 18,009> F Tabel 3,05, komunikasi dakwah yang efektif dan pembinaan akhlak terhadap akhlak santri, dan terdapat hubungan atau korelasi dengan r sederhana dengan nilai 0,749, menurut Priyato nilai 0,60-0,799 sangat kuat hubungannya dari efektivitas komunikasi dakwah dan pembinaan akhlak terhadap akhlak santri.

scholarly journals The effect of some seasonal conditions on oestrus occurrence in cows

2009 ◽  
Vol 52 (5) ◽  
pp. 459-465
Author(s):  
B. Bülbül ◽  
M. B. Ataman
Keyword(s):  
Seasonal Variation ◽  
Relative Humidity ◽  
Environmental Temperature ◽  
Suppressive Effect ◽  
Climatic Conditions ◽  
Holstein Cows ◽  
Ovarian Activity ◽  
Environment Temperature ◽  
Humidity Index ◽  
Annual Distribution

Abstract. In this study, the effect of climatic conditions on oestrus occurrence was investigated by using 9 972 oestrus records of cows recorded between 1995 and 2003. A distinct seasonal variation in the oestrus occurrence was determined. Oestrus occurrence observed in January, March, November and December was less than that in June and September (P<0.05). Annual distribution of the oestrus occurrence was positively correlated with environment temperature and insulation duration, but it was negatively correlated with rainfall (P<0.01). However, there was no relationship between oestrus occurrence and relative humidity. In addition to these, there was a slight decrease in the oestrus response when the temperature-humidity index (THI) was above 72; nevertheless, this decrease was not significant (P >0.05). The data presented in this study demonstrated that the increase in the environmental temperature up to 23 °C did not cause a suppressive effect on the ovarian activity. In conclusion, annual distribution of the oestrus occurrence is positively correlated with environment temperature and insulation duration whereas it is negatively correlated with rainfall in Holstein cows, in this study.

scholarly journals VERTICAL DISTRIBUTION OF DIATOMS ON MOSSES IN WELLS OF BIJELJINA MUNICIPALITY IN BOSNIA AND HERZEGOVINA

2019 ◽  
Vol 1 (20) ◽  
Author(s):  
Milenko Ćurčić ◽  
Dragica Milinković ◽  
Dragana Radivojević ◽  
Dijana Đurić
Keyword(s):  
Relative Humidity ◽  
Vertical Distribution ◽  
Air Temperature ◽  
Relative Number ◽  
Light Climate ◽  
Four Seasons ◽  
Different Depths ◽  
Area Unit ◽  
Number Of Individuals

Vertical distribution of species and infraspecies taxa of diatoms (Bacillariophyta) on well mosses where they live epiphytically, and a relative number of individuals per surface area unit were followed in 8 open wells with shadoof. Researches were conducted during 2015-2016 through four seasons. Sampling of algae material from well mosses that cover interior of the well was conducted on every 50 cm of depth starting from the surface (O cm) to 200 cm. Considering the specificity of substrate on which diatoms live in wells, and those are mosses that are especially expressed to 1,5 m depth of well and whose leafs cover each other and have an effect on light climate of micro habitat with already existing differences in intensity and quality of light, relative humidity of air, temperature of air on different depths, density of populations of certain species Bacillariophyta is in function of such ecological occasions on different well depths. It is concluded that the most abundant populations on mosses of researched wells, during most of the year, develop four aerophilic species of diatoms: Navicula contenta Grunow, N. atomus var. atomus (Kiitzing) Grunow, Achnanthes lanceolata (Brebisson) Grunow ssp. lanceolata var. lanceolata and Amphora normanii Rabenhorst.

scholarly journals Epidermis structure in Mesembryanthemaceae

Bothalia ◽  
1983 ◽  
Vol 14 (3/4) ◽  
pp. 937-937
Author(s):  
H. -D. Ihlenfeldt
Keyword(s):  
Cell Walls ◽  
Climatic Conditions ◽  
Radiation Balance ◽  
Outer Cell ◽  
Extreme Conditions ◽  
Prominent Feature ◽  
Oxalate Crystals ◽  
Different Types ◽  
Bladder Cells ◽  
Epidermis Structure

The Mesembryanthemaceae, which inhabit the deserts and semi-deserts of Southern Africa, exhibit two very different types of epidermis. The first is characterized by thick outer cell walls encrusted by oxalate crystals, a thick cuticle and thick wax layers. In the second type, the epidermal cells exhibit only very thin outer cell walls, not encrusted by oxalate crystals, a very thin cuticle, and wax layers are poorly developed; the most prominent feature of this type is the occurrence of huge idioblasts often protruding as ‘bladder cells’. With regard to the climatic conditions in the native habitats this type of epidermis must be called ‘abnormal’. Both types of epidermis may form sculptures of three distinct size classes, which are not necessarily homologous. The function of these sculptures is still poorly understood. There is evidence that the sculptures influence the optical properties of the surfaces and thereby the radiation balance (and heat stress) of the leaves.From recent research, it has become evident that the two different types of epidermis are the anatomical expression of two different strategies for survival under extreme conditions. Species with the idioblast type of epidermis exhibit a strategy that might be called ‘opportunistic’. These species have developed a mechanism of gaining water from the atmosphere during the night under favourable conditions. There are indications that the idioblasts are involved in this mechanism.

scholarly journals ANÁLISE DA TEMPERATURA E UMIDADE RELATIVA DO ARNO BAIRRO SANTA HELENA NA CIDADE DE OSVALDO CRUZ/SP

2018 ◽  
Vol 2 (4) ◽  
pp. 18-24
Author(s):  
Carlos Roberto Caputo ◽  
Margarete Cristiane de Costa Trindade Amorim
Keyword(s):  
Relative Humidity ◽  
Data Collection ◽  
Fixed Points ◽  
Natural Environment ◽  
Rural Environment ◽  
Territorial Expansion ◽  
Heat Islands ◽  
The City

From the urban territorial expansion, the natural environment wastransformed resulting in changes in the elements of the climate, such as the temperature and relative humidity of the air. Thus, the present study aimedto analyze the thermal and hygrometric field in the Santa Helena neighborhood in comparison to the nearby rural environment in the city of Osvaldo Cruz/SP. For this, fixed points of data collection of these two elements of the climate were used, relating them with the different use and occupation of the landand the characteristics of therelief. The results showed changes in the local atmosphere of Santa Helena, with heat islands and dry islands recorded at 15h, with intensities of up to +4,2ºC and -3,8% respectively. However, at 0h, fresh islandsand wetisland were diagnosed,with maximum values of -4,4ºC and +21,9%respectively.

On the subsistence practices of the Shi’erqiao Culture: focused on zooarchaeology

2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Kunyu He
Keyword(s):  
Early Stage ◽  
Subsistence Strategies ◽  
Chengdu Plain ◽  
Factors Influencing ◽  
Animal Remains ◽  
Different Types ◽  
Minimum Number ◽  
Minimum Number Of Individuals ◽  
Archaeological Cultures ◽  
Number Of Individuals

AbstractThrough the analyses of the number of identified specimens (NISP), minimum number of individuals (MNI) and estimation of meat available from the animal remains unearthed from representative sites of the Chengdu Plain Type and Eastern Chongqing Type of the Shi’erqiao Culture, this paper discusses the subsistence strategy of this culture. The results show that the meat resources of the Chengdu Plain Type were mainly domesticated animals, while those of the Eastern Chongqing Type were mainly hunted animals. This paper draws the conclusion that in the early stage of human civilization, the subsistence strategies of different types of the same archaeological culture might be different, while those of different archaeological cultures might be similar; the factors influencing the subsistence strategies are mainly the natural environment, regional economic traditions, and population pressures.

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