Aspects on the Forming, Evolution and Improvement of the Soil Cover within the Community Territory of Moroeni

2019 ◽  
Vol 13 (1) ◽  
pp. 7-12
Author(s):  
Sinziana Venera Morarita
Keyword(s):  
Soil Cover ◽  
Direct Observations ◽  
Academic Year

Abstract The purpose of the paper is to thoroughly understand the soil cover in the Moroeni commune, Dâmboviţa County, in order to establish the best measures for its protection, improvement and judicious use. The paper was drafted on the basis of data gathered in three research stages: • the investigation and documentation stage, which took place at the end of the academic year 2016-2017; • the stage of the field, which took place in the summer of 2017, when we made direct observations (on the spot) in the studied area, we made sketches, photographs; • the processing and interpretation stage of the cartographic material, which took place during the academic year 2017-2018. In the paper are presented the pedogenic factors and processes that contributed to the formation of the soil cover in the studied territory, as well, there are described both morphologically and in terms of physicochemical analyzes the classes and types of soils that have been identified on the field. It also presents the main categories of use in the studied territory and the measures for the protection and improvement of soils in order to increase their fertility.

scholarly journals Upaya Peningkatkan Prestasi Belajar tentang Sistem Periodik Unsur melalui Metode KIMLA Pada Siswa Kelas X MIPA SMA

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Happy Setyawati
Keyword(s):  
Learning Outcomes ◽  
National Curriculum ◽  
Learning Activities ◽  
Learning Material ◽  
Learning Method ◽  
Direct Observations ◽  
Scientific Approach ◽  
Tenth Grade ◽  
Minimum Score ◽  
Academic Year

<p>Abstract. The national curriculum of learning takes place through the Scientific Approach, students are guided to be able to find learning material by themselves. Not all students can be easily active in learning, because they are afraid to ask questions, lazy even some do not understand so learning is increasingly confusing. Learning with the habits of students want to explain the teacher, making students less active in the learning process and the results obtained are not optimal. Chemistry is often considered to be an elusive lesson that causes student<br />dislike. Pleasant learning methods are needed so as to create joyful nuanced learning situations that make students absorbed, comfortable and excited. The learning method chosen in this study was the KIMLA learning method, namely the method of discussion using songs as a medium in learning Chemistry. With the KIMLA method, it is expected that there will be an increase in the activeness and learning achievement of students in the periodic Chemistry System Learning subject elements. This research is a Classroom Action Research conducted at<br />SMA 1 Ceper Klaten, in the odd semester of the 2018/2019 academic year in September 2018 - October 2019, the target in this study was the tenth grade students of MIPA 1 with 28 students consisting of 12 sons and 16 daughters. Data obtained through observation are direct observations when taking student learning activities data, and assessment sheets are continued by analysis of the average pre-action test scores, cycle 1 and cycle II. The criteria for the success of giving an action are if students get a minimum score of 67 KKM, with the percentage of learning completeness 75% of 28 students, while the success criteria for learning<br />activeness are 80%. Based on the results of the research and discussion it was concluded that there was an increase in the activeness of students to 96.4% and 100% learning outcomes completed with an average of 79.</p>

Direct observations of radiation-enhanced transformations in glass

1983 ◽  
Vol 41 ◽  
pp. 354-355
Author(s):  
J. F. DeNatale ◽  
D. G. Howitt
Keyword(s):  
Glass Matrix ◽  
Diffusion Mechanism ◽  
Bubble Formation ◽  
Silicate Glasses ◽  
Phase Decomposition ◽  
Direct Observations ◽  
Thin Foils ◽  
Oxygen Bubble ◽  
Electron Energy Loss ◽  
Kinetics Of

The electron irradiation of silicate glasses containing metal cations produces various types of phase separation and decomposition which includes oxygen bubble formation at intermediate temperatures figure I. The kinetics of bubble formation are too rapid to be accounted for by oxygen diffusion but the behavior is consistent with a cation diffusion mechanism if the amount of oxygen in the bubble is not significantly different from that in the same volume of silicate glass. The formation of oxygen bubbles is often accompanied by precipitation of crystalline phases and/or amorphous phase decomposition in the regions between the bubbles and the detection of differences in oxygen concentration between the bubble and matrix by electron energy loss spectroscopy cannot be discerned (figure 2) even when the bubble occupies the majority of the foil depth.The oxygen bubbles are stable, even in the thin foils, months after irradiation and if van der Waals behavior of the interior gas is assumed an oxygen pressure of about 4000 atmospheres must be sustained for a 100 bubble if the surface tension with the glass matrix is to balance against it at intermediate temperatures.

Metallurgical Effects of Grain Boundary Ledges

1977 ◽  
Vol 35 ◽  
pp. 126-129
Author(s):  
L.E. Murr
Keyword(s):  
Grain Boundary ◽  
Quantitative Data ◽  
Mechanical Treatment ◽  
Unit Length ◽  
Physical And Mechanical Properties ◽  
Direct Observations ◽  
Transmission Electron ◽  
Properties Of Materials ◽  
Thermo Mechanical Treatment ◽  
Ledge Density

Ledges in grain boundaries can be identified by their characteristic contrast features (straight, black-white lines) distinct from those of lattice dislocations, for example1,2 [see Fig. 1(a) and (b)]. Simple contrast rules as pointed out by Murr and Venkatesh2, can be established so that ledges may be recognized with come confidence, and the number of ledges per unit length of grain boundary (referred to as the ledge density, m) measured by direct observations in the transmission electron microscope. Such measurements can then give rise to quantitative data which can be used to provide evidence for the influence of ledges on the physical and mechanical properties of materials.It has been shown that ledge density can be systematically altered in some metals by thermo-mechanical treatment3,4.

Direct Observations of the Epitaxial Growth of Sputtered Ag on Si

1973 ◽  
Vol 31 ◽  
pp. 122-123
Author(s):  
J. S. Maa ◽  
Thos. E. Hutchinson
Keyword(s):  
Epitaxial Growth ◽  
Film Growth ◽  
Ion Beam ◽  
Ion Beam Sputtering ◽  
Microscopy Technique ◽  
Direct Observations ◽  
In Situ Electron Microscopy ◽  
Beam Sputtering ◽  
The Subject

The growth of Ag films deposited on various substrate materials such as MoS2, mica, graphite, and MgO has been investigated extensively using the in situ electron microscopy technique. The three stages of film growth, namely, the nucleation, growth of islands followed by liquid-like coalescence have been observed in both the vacuum vapor deposited and ion beam sputtered thin films. The mechanisms of nucleation and growth of silver films formed by ion beam sputtering on the (111) plane of silicon comprise the subject of this paper. A novel mode of epitaxial growth is observed to that seen previously.The experimental arrangement for the present study is the same as previous experiments, and the preparation procedure for obtaining thin silicon substrate is presented in a separate paper.

Void-Lattice Formation in Natural Fluorite by Electron Irradiation

1976 ◽  
Vol 34 ◽  
pp. 614-615 ◽  
Author(s):  
L.E. Murr
Keyword(s):  
Electron Microscope ◽  
Electron Irradiation ◽  
Heavy Ion ◽  
High Energy ◽  
Stoichiometric Ratio ◽  
Direct Observations ◽  
Transmission Electron ◽  
Anion Vacancies ◽  
Cation And Anion Vacancies ◽  
Lattice Formation

The production of void lattices in metals as a result of displacement damage associated with high energy and heavy ion bombardment is now well documented. More recently, Murr has shown that a void lattice can be developed in natural (colored) fluorites observed in the transmission electron microscope. These were the first observations of a void lattice in an irradiated nonmetal, and the first, direct observations of color-center aggregates. Clinard, et al. have also recently observed a void lattice (described as a high density of aligned "pores") in neutron irradiated Al2O3 and Y2O3. In this latter work, itwas pointed out that in order that a cavity be formed,a near-stoichiometric ratio of cation and anion vacancies must aggregate. It was reasoned that two other alternatives to explain the pores were cation metal colloids and highpressure anion gas bubbles.Evans has proposed that void lattices result from the presence of a pre-existing impurity lattice, and predicted that the formation of a void lattice should restrict swelling in irradiated materials because it represents a state of saturation.

Direct observation of Fe-Al-Zn ternary intermetallic compound and its transformation during the early stage of hot-dip galvanizing

1993 ◽  
Vol 51 ◽  
pp. 1116-1117
Author(s):  
C. S. Lin ◽  
W. A. Chiou ◽  
M. Meshii
Keyword(s):  
Intermetallic Compound ◽  
Reaction Rate ◽  
Diffusion Rate ◽  
Early Stage ◽  
Zinc Bath ◽  
Steel Sheets ◽  
Direct Observations ◽  
Solid Iron ◽  
Iron And Zinc ◽  
Ternary Intermetallic Compound

The galvannealed steel sheets have received ever increased attention because of their excellent post-painting corrosion resistance and good weldability. However, its powdering and flaking tendency during press forming processes strongly impairs its performance. In order to optimize the properties of galvanneal coatings, it is critical to control the reaction rate between solid iron and molten zinc.In commercial galvannealing line, aluminum is added to zinc bath to retard the diffusion rate between iron and zinc by the formation of a thin layer of Al intermetallic compound on the surface of steel at initial hot-dip galvanizing. However, the form of this compound and its transformation are still speculated. In this paper, we report the direct observations of this compound and its transformation.The specimens were prepared in a hot-dip simulator in which the steel was galvanized in the zinc bath containing 0.14 wt% of Al at a temperature of 480 °C for 5 seconds and was quenched by liquid nitrogen.

Early and Late Academic Year Predictors of Homesickness Among College Freshmen

2003 ◽  
Author(s):  
Jana M. Lewis ◽  
Jennifer M. Sweet ◽  
Diana M. Post ◽  
Travis Tubre
Keyword(s):  
College Freshmen ◽  
Academic Year

Psychology Faculty Salaries for the 2014-2015 Academic Year

2015 ◽  
Author(s):  
Peggy Christidis ◽  
Luona Lin ◽  
Karen Stamm
Keyword(s):  
Faculty Salaries ◽  
Psychology Faculty ◽  
Academic Year

Prediction of dark personality traits and self-destruction based on emotion regulation among adolescent females

2020 ◽  
pp. 109-115
Keyword(s):  
Emotion Regulation ◽  
Personality Traits ◽  
Sampling Method ◽  
Risky Behaviors ◽  
Adolescent Females ◽  
Dark Triad ◽  
Cluster Sampling ◽  
Targeted Interventions ◽  
Difficulties In Emotion Regulation ◽  
Academic Year

Background and Aims: Temperament is determined as a relatively constant, basic, and innate position that underlies and modifies the expression of activity, emotionality, and sociability among people. The current study aimed to investigate the prediction of dark personality traits and self-destruction based on emotion regulation among adolescent females. Materials and Methods: This correlational study included 250 adolescent females using a cluster sampling method in the academic year of 2018-19 in Shiraz, Iran. The participants were asked to complete Difficulties in Emotion Regulation Scale, Dark Triad Scale, and Chronic Self-Destructiveness Scale. Results: The results of the regression analysis showed that emotion regulation with beta coefficients was able to predict significant and positive dark personality traits (0.25), narcissism (0.49), Machiavellianism (0.39), psychopathy (0.32), sadism (0.35), and self-destructiveness (0.49) (P<0.05). Conclusion: Directly targeted interventions to regulate emotion may be useful in addressing risky behaviors of adolescents with self-destructive and dark personality traits.

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