Computerized Solutions for Some Problems of Fold Geometry

1971 ◽  
Vol 8 (6) ◽  
pp. 688-693 ◽  
Author(s):  
Eric Nidd ◽  
J. W. Ambrose
Keyword(s):  
Standard Deviation ◽  
Apical Angle ◽  
Structural Homogeneity ◽  
The Ideal

If the form of a fold is conical, important elements of its geometry are the attitude of its axis and the degree of conicity (i.e. the size of the semi-apical angle of the cone). (If the fold is cylindrical this angle is 0°; but as the semi-apical angle increases to 90° as a limit, the cone approaches a plane.) These elements of a conical fold can be calculated, given the attitudes of a number of planes tangential to the fold surface. Also the standard deviation of the observations from the ideal can be calculated and used to test the structural homogeneity of a given area. Previous solutions to this problem lead to ambiguous answers, as shown by C. S. Venkitasubramanyan (this issue).

scholarly journals The Pedagogical Competence in Developing Assessment Instruments of Physics High School Teachers in Merauke District

2021 ◽  
Vol 7 (2) ◽  
pp. 281
Author(s):  
Desy Kumala Sari ◽  
Nur Arip Budiman ◽  
Pri Ariadi Cahya Dinata ◽  
Syamsul Bahri
Keyword(s):  
Standard Deviation ◽  
High School Teachers ◽  
Assessment Instruments ◽  
Content Validation ◽  
School Teachers ◽  
Physics Teachers ◽  
Test Instrument ◽  
Pedagogical Competence ◽  
Data Collection Instrument ◽  
The Ideal

This study aims to map the ability to develop assessment instruments owned by physics teachers, especially in the Merauke district. The method used in this research is descriptive quantitative. Respondents who were involved in this study were 14 respondents who were physics teachers in Merauke. The data collection instrument used was a questionnaire containing 25 statements. The data of the research results were analyzed using the Ideal Standard Deviation. Overall, physics teachers’ competence in constructing and analyzing items is in the “good” category, with an average of 90.5. However, some assessment indicators need to be improved, such as reviewing objectives of constructing test instrument, content validation, revising based on validator’s suggestions, and analyzing the items.

scholarly journals KOMPARASI HASIL BELAJAR MATEMATIKA MELALUI PENDEKATAN PROBLEM SOLVING DAN PROBLEM POSING PADA SISWA KELAS IV SD SWASTA RAMA SEJAHTERA KOTA MAKASSAR

2020 ◽  
Vol 3 (1) ◽  
pp. 56-69
Author(s):  
ERWIN NURDIANSYAH ◽  
DINAR RIADDIN
Keyword(s):  
Elementary School ◽  
Statistical Analysis ◽  
Standard Deviation ◽  
Problem Solving ◽  
Learning Outcomes ◽  
Mathematics Learning ◽  
Fourth Grade ◽  
Problem Posing ◽  
Fourth Grade Students ◽  
The Ideal

This type of research is an experimental study involving two groups given different treatments. This study aims to find out (1) how much the mathematics learning outcomes of fourth grade students of Makassar City Rama Sejahtera Private Elementary School were taught using a problem solving approach, (2) How much the mathematics learning outcomes of fourth grade Rama Sejahtera Private Elementary School Makassar were taught using the problem posing approach, (3) There is a difference between the results of mathematics learning in fourth grade students of Rama Sejahtera Private Elementary School in Makassar City between those taught using a problem solving approach and those taught using a problem posing approach. The population of this study was fourth grade students of Makassar City Rama Sejahtera Private Elementary School in the even semester 2018/2019 which consisted of 3 classes and 2 randomly selected classes as the research sample. Data collection techniques were carried out using learning outcomes tests (pretest and posttest) and observation sheets. The collected data was analyzed using descriptive and inferential statistical analysis techniques. The results obtained from descriptive statistical analysis are: (1) Mathematics learning outcomes of students taught by using problem solving approaches are in the high category with an average of 73.36 and standard deviation of 10.20 of the ideal score of 100. (2) Learning outcomes Mathematics students taught by the problem posing approach are in the low category with an average of 67.96 and standard deviation of 8.29 from the ideal score of 100. From the results of inferential statistical analysis it can be concluded that the mathematics learning outcomes of students taught by problem solving approaches are different from mathematics learning outcomes of students taught by using the problem posing approach.

scholarly journals North error estimation based on solar elevation errors in the third step of sky-polarimetric Viking navigation

2016 ◽  
Vol 472 (2191) ◽  
pp. 20160171 ◽  
Author(s):  
Dénes Száz ◽  
Alexandra Farkas ◽  
András Barta ◽  
Balázs Kretzer ◽  
Ádám Egri ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Error Function ◽  
Summer Solstice ◽  
Solar Elevation ◽  
The Third ◽  
The North ◽  
Spring Equinox ◽  
High Elevations ◽  
Navigation Method ◽  
The Ideal

The theory of sky-polarimetric Viking navigation has been widely accepted for decades without any information about the accuracy of this method. Previously, we have measured the accuracy of the first and second steps of this navigation method in psychophysical laboratory and planetarium experiments. Now, we have tested the accuracy of the third step in a planetarium experiment, assuming that the first and second steps are errorless. Using the fists of their outstretched arms, 10 test persons had to estimate the elevation angles (measured in numbers of fists and fingers) of black dots (representing the position of the occluded Sun) projected onto the planetarium dome. The test persons performed 2400 elevation estimations, 48% of which were more accurate than ±1°. We selected three test persons with the (i) largest and (ii) smallest elevation errors and (iii) highest standard deviation of the elevation error. From the errors of these three persons, we calculated their error function, from which the North errors (the angles with which they deviated from the geographical North) were determined for summer solstice and spring equinox, two specific dates of the Viking sailing period. The range of possible North errors Δ ω N was the lowest and highest at low and high solar elevations, respectively. At high elevations, the maximal Δ ω N was 35.6° and 73.7° at summer solstice and 23.8° and 43.9° at spring equinox for the best and worst test person (navigator), respectively. Thus, the best navigator was twice as good as the worst one. At solstice and equinox, high elevations occur the most frequently during the day, thus high North errors could occur more frequently than expected before. According to our findings, the ideal periods for sky-polarimetric Viking navigation are immediately after sunrise and before sunset, because the North errors are the lowest at low solar elevations.

Septal Vein Symmetry: Implications for Endoscopic Septum Pellucidotomy

2010 ◽  
Vol 67 (suppl_2) ◽  
pp. ons395-ons401 ◽  
Author(s):  
Jonathan Roth ◽  
Adelou Olasunkanmi ◽  
Kalman Rubinson ◽  
Jeffrey H. Wisoff
Keyword(s):  
Standard Deviation ◽  
Corpus Callosum ◽  
Size Distribution ◽  
Septum Pellucidum ◽  
Anterior Region ◽  
Careful Evaluation ◽  
Foramen Of Monro ◽  
Septal Region ◽  
Safe Area ◽  
The Ideal

ABSTRACT BACKGROUND: Endosopic septum pellucidotomy is used for treating patients with unilateral and specific types of bilateral hydrocephalus. The ideal location for septostomy is controversial; however, an avascular region is preferred. OBJECTIVE: As the septal veins (SVs) are viewed only from one side, we studied the symmetry of the SVs in an attempt to define a safe area for septostomy. METHODS: Sixteen cadaver brains were dissected. The septum pellucidum was exposed bilaterally and divided into 3 regions. SVs of both sides were evaluated according to number, size, distribution, and location relative to common markers on both sides. RESULTS: Each side included 1 to 7 large veins (mean ± standard deviation, 2.3 ± 1.4), 0 to 3 small veins (2.05 ± 1.73), and a total of 2 to 7 veins (4.35 ± 1.53). Of the large veins, 88% were located in the anterior septal region (anterior to the foramen of Monro). Among the 10 brains that were extensively dissected, 90% had asymmetric SVs (either in the number of large veins or in the existence of any veins) in at least 1 of the septal regions, and 50% of brains had asymmetric SVs in the anterior region. CONCLUSION: Distribution of the SVs is asymmetric in most cases. We recommend septostomy be performed at the anterior area of the middle septal region, at the level of the foramen of Monro, mid-height between the corpus callosum and fornix. Careful evaluation of preoperative images and thorough coagulation at the septostomy site are essential to avoid injury to a contralateral large SV.

scholarly journals The Influence of Heat Input on the Surface Quality of Wire and Arc Additive Manufacturing

2021 ◽  
Vol 11 (21) ◽  
pp. 10201
Author(s):  
Jiayi Zeng ◽  
Wenzhong Nie ◽  
Xiaoxuan Li
Keyword(s):  
Additive Manufacturing ◽  
Standard Deviation ◽  
Root Mean Square ◽  
Surface Quality ◽  
Heat Input ◽  
Quantitative Description ◽  
Mean Square ◽  
Profile Model ◽  
The Ideal

Wire and arc additive manufacturing has unique process characteristics, which make it have great potential in many fields, but the large amount of heat input brought by this feature limits its practical application. The influence of heat input on the performance of parts has been extensively studied, but the quantitative description of the influence of heat input on the surface quality of parts by wire and arc additive manufacturing has not received enough attention. According to different heat input, select the appropriate process parameters for wire and arc additive manufacturing, reversely shape the profile model, select the appropriate function model to establish the ideal profile model according to the principle of minimum error, and compare the two models to analyze the effect of heat input on the surface quality of the parts manufactured by wire and arc additive manufacturing. The results show that, when the heat input is high or low, the standard deviation value and the root mean square value reach 1.908 and 1.963, respectively. The actual profile is larger than the ideal profile. When the heat input is moderate, the standard deviation value and the root mean square value are only 1.634 and 1.713, respectively, and the actual contour is in good agreement with the ideal contour. Combined with the analysis of the transverse and longitudinal sections, it is shown that the heat input has a high degree of influence on the surface quality of the specimen manufactured by wire and arc additive manufacturing, and higher or lower heat input is disadvantageous to it.

scholarly journals The Emotional Intelligence Of Final Semester Students Of English Department In Facing The Thesis Writing At University Of Sembilanbelas November, Kolaka

2017 ◽  
Vol 2 (2) ◽  
Author(s):  
Ummy Chalzum ◽  
Karman Karman
Keyword(s):  
Emotional Intelligence ◽  
Standard Deviation ◽  
Sampling Technique ◽  
English Department ◽  
Self Awareness ◽  
The Mean ◽  
Quota Sampling ◽  
High Level ◽  
Thesis Writing ◽  
The Ideal

This study was aimed at determining the level of emotional intelligence and find out the dominant aspect of the emotional intelligence of final semester students of English Department at University of Sembilanbelas November, Kolaka. This study was a survey research. The respondents in this study were the final level students of English Department. The number of respondents in this study was 40 respondents. The instruments of this study were a questionnaire and interview guideline. The sampling technique was quota sampling technique. Based on the analysis of the result of the Mean and Standard Deviation, 37 respondents or 92.5% had a standard level of emotional intelligence and 3 respondents or 7.5% had a high level of emotional intelligence. From the result of the calculation of the data, the ideal Mean (Mi) and the ideal Standard Deviation (SDi) of each aspect of emotional intelligence, it was found that the dominant aspect in students’ emotional intelligence was self-awareness, then followed by the aspect of empathy, then followed by the aspect of motivation, and then the aspect of social skills, and the latter was aspect of self-setting. To add, the level of their emotional intelligence was categorized as very high with SD.

scholarly journals The Mindfulness aspects in the teaching of culinary art in vocational high school

2021 ◽  
Vol 11 (2) ◽  
Author(s):  
Nur Faizal Adkha ◽  
Putu Sudira ◽  
Ranu Iskandar
Keyword(s):  
High School ◽  
High Schools ◽  
Data Analysis ◽  
Standard Deviation ◽  
Descriptive Analysis ◽  
Theoretical Studies ◽  
Vocational High School ◽  
Vocational High Schools ◽  
Special Region ◽  
The Ideal

This study aims to describe the aspects of mindfulness in the teaching of culinary art in vocational high schools. The aspects of mindfulness in the field of teaching consist of novelty, variety, joyfulness, meaningfulness, and alertness in learning. The benefits of mindfulness are related to the competencies in creativity, communication, collaboration, and critical thinking. These competencies are often referred to as the "Four C's" and are considered important competencies in the 21st century. The research variables based on theoretical studies in the fields of education and psychology consist of novelty, variety, joyfulness, meaningfulness, and alertness in learning. The population in this study is productive teachers of the department of culinary art at five vocational high schools in the Special Region of Yogyakarta. The specified sample is 30 teachers. The data were collected using a questionnaire. The validity was measured through product-moment testing, and the reliability was measured using the Cronbach alpha model with the SPSS 16.00 program. The data analysis was done using descriptive analysis. The data were analyzed by calculating the ideal score, mean, and standard deviation and by categorizing the data. The results show that the mindfulness aspect of culinary teaching consists of 1.) Novelty, which is in the good category, with a percentage of 53.33%; 2.) Variation, which is in the good category, with a percentage of 66.67%; 3.) Excitement, which is in the very good category, with a percentage of 60%; 4.) Meaningfulness, which is in the very good category, with a percentage of 76.67%; and 5.) Alertness, which is in the very good category, with a percentage of 70%.

scholarly journals Plot size under field conditions to determine soybean agronomic characteristics

2020 ◽  
Vol 1 (1) ◽  
pp. 83
Author(s):  
Cristiani Belmonte ◽  
Edmar Soares de Vasconcelos ◽  
Andressa Strenske ◽  
Eloisa Lorenzetti
Keyword(s):  
Standard Deviation ◽  
Regression Models ◽  
Sample Standard Deviation ◽  
Soybean Yield ◽  
Plot Size ◽  
Plant Stand ◽  
The Difference ◽  
Soybean Plants ◽  
The Relationship ◽  
The Ideal

Within the field of performance of agricultural experimentation we have some obstacles related to conducting experiments, the biggest of which is the comparison between treatments with the greatest possible precision, in order to arrive at safe conclusions from the observed results. The objective of this work was to evaluate the relationship between the plot sizes and the stand determination, height at maturation, as well as soybean yield. Three areas were cultivated with soybean for this purpose. In the plant stand determination 18 plot sizes were tested, at the plant height at maturation 14 sizes were tested, and 10 sizes were tested for productivity. The characteristics measurement was performed in triplicate for each plot size, randomly distributed within each area. The characteristic mean for each plot size allowed the adjustment subjective of two regression models, one facing up and one facing down. At the point where the difference among the adjusted models reached the value of the sample standard deviation, the ideal minimum plot size was determined. The evaluation of 14.3 linear m is required in the soybean plants stand determination. It is necessary to quantify 26 plants to guarantee an ideal estimate of the soybean plants at maturity height. It is necessary crop 22 m2 plot to safeguard an ideal estimate of soybean yield.

scholarly journals Implementasi Pembelajaran Kooperatif Think Pair Share Guna Meningkatkan Kualitas Pembelajaran Sosiologi

2021 ◽  
Vol 6 (2) ◽  
pp. 61-67
Author(s):  
Hamsah
Keyword(s):  
Standard Deviation ◽  
Learning Outcomes ◽  
Student Attitudes ◽  
Social Values ◽  
Action Observation ◽  
Student Learning Outcomes ◽  
Average Score ◽  
The Subject ◽  
Planning Action ◽  
The Ideal

Classroom antion research is a study consisting of 2 cycles and 4 stages (planning, action, observation and reflection). Each cycle held 4 meeting in class X IPS, SMA Negeri I Lappariaja Bone Regency with 39 students, 19 boys and 20 girls. This study aims to improve the sociology learning outcomes of the subject of social values ​​and norms by implementing think pair share cooperative learning model. The results of the quantitative analysis show that: (1) The learning outcomes of students in the first cycle are in the medium category with an average score of 65 from the ideal score of 100 with a standard deviation of 10 from the total number of students who complete learning as much as 13 and reach a percentage of 33.3% completeness. (2) Student learning outcomes in cycle II are in the high category with an average score of 79 of the ideal score of 100 with a standard deviation of 9 and the number of students who complete learning is 37 and reaches a percentage of 94.9% completeness. The results of the qualitative analysis describe changes in student attitudes, attendance levels, student activeness and interest during the learning process

scholarly journals Pengaruh Pendidikan Agama Islam Terhadap Akhlak (Perilaku Jujur)

2018 ◽  
Vol 1 (1) ◽  
pp. 55-70
Author(s):  
Besse Tanri Akko
Keyword(s):  
Standard Deviation ◽  
Religious Education ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
Islamic Education ◽  
Average Score ◽  
Daily Lives ◽  
Ex Post ◽  
Ex Post Facto ◽  
The Ideal

This study aims to determine the effect of Islamic Education Against Morals (Honest Behavior) of Class X Students in SMA 3 Palopo. This study uses a causal ex-post facto research design with a population of 277 class X students with sampling using a probability sampling technique with a simple random sampling technique established by 73 students. Data collection techniques in this study used observation, documentation and questionnaire techniques. The results of data processing obtained an average score of Islamic education, which is 86.40 with a standard deviation of 7.684 from the ideal score of 100. Similarly, the average score of honest behavior is 88.77 with a standard deviation of 5.760 of the ideal score of 100. The results his research shows that Islamic religious education has a significant influence on the honest behavior of class X students in SMA 3 Palopo with a percentage of 17.2%, while the rest is influenced by other factors. The implication of this research is that if Islamic religious education is taught well it will have a big influence on the formation of the morality of students, the especially honest character which students will actualize in their daily lives both for themselves and for others.

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