scholarly journals PERBANDINGAN ANALISIS NUMERIK MENGGUNAKAN METODE SECANTDAN METODE ITERASI SATU TITIK UNTUK MENENTUKAN KOEFISIEN GESEK UDARA PADA KUBUS DAN SILINDRIS

2018 ◽  
Vol 5 (2) ◽  
pp. 43
Author(s):  
Linda Sekar Utami
Keyword(s):  
Friction Coefficient ◽  
Experimental Research ◽  
Coefficient Of Friction ◽  
Iteration Method ◽  
Secant Method ◽  
A Value ◽  
The Difference ◽  
The One ◽  
The Relationship

Abstrak:Koefisien gesek udara merupakan kemampuan udara untuk memberikan gesekan atau tahanan terhadap benda yang melaluinya, sehingga dapat memperlambat laju benda tersebut.Penelitian ini merupakan penelitian eksperimen laboratorium yang bertujuan untuk mengetahui perbedaan hasil analisis mengunakan metode  secant  dan metode iterasi satu titik dan menentukan nilai koefisien gesek udara (c) pada Kubus dan silinderis.Hasil dari penelitian dan pengamatan yang dilakukan dianalisi menggunakan metode  secantdan metode iteasi satu titik. Nilai  v diperoleh dengan menurunkan persamaan  h(t) yang diperoleh dari grafik hubungan antara  hdan  tmenggunakan  Microsoft exel. Dengan menggunakan metode  secantdiperoleh kooefisien gesek (cg) pada kubus pada rentang antara (0,21256 - 0,55411) kg/s sedangkan pada silindris  berada pada rentang antara (0,19252 - 0,46616) kg/shal ini menujukan koefisien gesek udara yang dihasilkan dengan metode  secantmemiliki nilai yang konsatan baik pada kubus ataupun silinderis. Hal ini terjadi karna nilai  cgpada kubus dan silindris tersebut berada pada rentang orde 0<cg<1. Dengan menggunakan metode iterasi satu titik diperoleh kooefisien gesek (cg) pada kubus dengan rentang (0,01674 - 0,12713) kg/s sedangkan pada silindris  berada pada rentang antara (0,01653 - 0,10046 ) kg/s hal ini menjukan koefisien gesek udara yang dihasilkan dengan metode iterasi satu titik memiliki nilai yang konsatan baik pada kubus ataupun silinderis. Dengan menggunakan metode  secantnilai koefisien gesek udara yang di hasilakan berada dibawah nilai satu atau 0,1 sedangkan nilai  koefisien yang dihasilkan dengan menggunakan pendekatan iterasi satu titik berada dibawah 0,01.Sehingga dapat disimpulkan metode iterasi satu lebih teliti dalam menentukan koefisien gesek udara dibandingkan dengan metode secantAbstract: Air friction coefficient is the ability of air to provide friction or resistance to the object through it, so as to slow the rate of the object tersebut.Penelitian is a laboratory experimental research that aims to determine the difference of the results of the analysis using secant method and one-point iteration method and determine the value of air friction coefficient (c) on cube and cylinder. The results of the research and observation were analyzed using secant method and one point iteation method. The value of v is derived by deriving the equation h (t) obtained from the graph of the relationship between hdan using Microsoft exel. Using the method secantdiperoleh kooefisien friction (cg) on the cube in the range between (0.21256 - 0,55411) kg / s while on the cylindrical is in the range between (0.19252 - 0.46616) kg / shal is addressed coefficient of friction which is produced by secant method has a value that is either in the cube or cylindrical consumptions. This happens because the value of cgpada cube and cylindrical is in the order range 0 <cg <1. Using one point iteration method, the friction coefficient (cg) in the cube with the range (0.01674 - 0.12713) kg / s while on the cylindrical is in the range between (0.01653 - 0.10046) kg / the air friction coefficient generated by the one-point iteration method has a value of either a cube or a cylindrical consonant. Using the method secantnilai air friction coefficient that in the yield is below the value of one or 0.1 while the coefficient value generated by using a one-point iteration is below 0.01. So it can be concluded one more accurate iteration method in determining the coefficient of air friction compared with secant method.

Experimental study on the relationship between the friction coefficient and interference in locomotive axle press-fitting

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ting Wang ◽  
Hanfei Guo ◽  
Jianjun Qiao ◽  
Xiaoxue Liu ◽  
Zhixin Fan
Keyword(s):  
Friction Coefficient ◽  
Coefficient Of Friction ◽  
Friction Pair ◽  
Rolling Stock ◽  
Content Type ◽  
Press Fitting ◽  
The Press ◽  
The Coefficient Of Friction ◽  
The Relationship ◽  
Locomotive Wheels

PurposeTo address the lack of data in this field and determine the relationship between the coefficient of friction and the interference between locomotive wheels and axles, this study evaluates the theoretical relationship between the coefficient of friction and the interference under elastic deformation.Design/methodology/approachWhen using numerical analyses to study the mechanical state of the contacting components of the wheels and axle, the interference between the axle parts and the coefficient of friction between the axle parts are two important influencing factors. Currently, as the range of the coefficient of friction between the wheel and axle in interference remains unknown, it is generally considered that the coefficient of friction is only related to the materials of the friction pair; the relationship between the interference and the coefficient of friction is often neglected.FindingsA total of 520 press-fitting experiments were conducted for 130 sets of wheels and axles of the HXD2 locomotive with 4 types of interferences, in order to obtain the relationship between the coefficient of friction between the locomotive wheel and axle and the amount of interference. These results are expected to serve as a reference for selecting the coefficient of friction when designing axle structures with the rolling stock, research on the press-fitting process and evaluations of the fatigue life.Originality/valueThe study provides a basis for the selection of friction coefficient and interference amount in the design of locomotive wheels and axles.

scholarly journals Hubungan antara Kedalaman Permukaan Air Tanah dengan Salinitas di Pesisir Pantai Kungkai Baru serta Penggunaan Model Discovery Learning

2018 ◽  
Vol 2 (2) ◽  
pp. 178-182
Author(s):  
Sutijo Joko Sudiro ◽  
Muchammad Farid ◽  
Eko Swistoro
Keyword(s):  
Learning Outcomes ◽  
Learning Model ◽  
Discovery Learning ◽  
High Ability ◽  
Significance Level ◽  
Average Value ◽  
A Value ◽  
Quasi Experimental ◽  
The Difference ◽  
The Relationship

ABSTRACT [Relationship between Groundwater Surface Depth with Salinity at the Coast of New Kungkai Beach and its Implementation on Discovery Learning Model]. The aims of this study were 1) to describe the relationship between groundwater surface depth with salinity in the coastal areas of new kungkai beach of Seluma, and 2) to determine the improvement of learning outcomes (cognitive) of high ability students, moderate and low by using discovery learning model on the concept of static fluid in class X computer and network engineering at SMK Negeri 3 Seluma. This research was a quasi experimental research with one groups pretest-posttest design. The results showed: 1) The relationship between depth with salinity has a value of 0.6478 with a significance level of 0.001 (<0.05); 2) Learning with discovery learning model can improve student learning outcomes on cognitive aspects (knowledge). Increased cognitive results can be seen from the average value of the initial test, the final test and the average value of gain in the class x Tkj is high-ability groups are at high criteria with a value of 0.75 gain in the group is in the criteria medium with the value of gain 0,52 and in the low group were in moderate criteria with a gain value of 0.44. There is a difference in learning outcomes between the high, medium and low groups. The difference is shown by Fcount > Ftable (4.04 > 3.35) with a significance level of 5%. Keywords: Groundwater surface depth; salinity; discovery learning model; SMKN 3 Seluma.

“Soviet mentality?” The role of shared political culture in relations between the Armenian state and Russia's Armenian diaspora

2013 ◽  
Vol 41 (5) ◽  
pp. 709-729 ◽  
Author(s):  
Kristin Cavoukian
Keyword(s):  
Soviet Union ◽  
Political Culture ◽  
Community Organization ◽  
The Soviet Union ◽  
Armenian Diaspora ◽  
The Difference ◽  
The One ◽  
Management Institutions ◽  
The Relationship

Russia's Armenians have begun to form diaspora institutions and engage in philanthropy and community organization, much as the pre-Soviet “established” diaspora in the West has done for years. However, the Russian Armenian diaspora is seen by Armenian elites as being far less threatening due to a shared “mentality.” While rejecting the mentality argument, I suggest that the relationship hinges on their shared political culture and the use of symbols inherited from the Soviet Union in the crafting of new diaspora and diaspora-management institutions. Specifically, “Friendship of the Peoples” symbolism appears to be especially salient on both sides. However, the difference between old and new diasporas may be more apparent than real. The Russian Armenian diaspora now engages in many of the same activities as the Western diaspora, including the one most troublesome to Armenia's elites: involvement in politics.

New Boundaries, New Relationships

2020 ◽  
pp. 79-97
Author(s):  
LaTonya J. Trotter
Keyword(s):  
Registered Nurses ◽  
Nurse Practitioner ◽  
Power Relations ◽  
Medical Work ◽  
Nurses And Physicians ◽  
Signal Changes ◽  
The Difference ◽  
The Stability ◽  
The One ◽  
The Relationship

This chapter evaluates how the presence of the nurse practitioner (NP) does not just signal changes in nursing work; it portends changes in medical work. Although real tensions exist between nurses and physicians, broadly speaking, they have worked collegially alongside one another for well over a century. This collegiality has endured despite significant changes in what both physicians and nurses do for patients. Its endurance, however, has been predicated on the one thing that has not changed: the power relations between the two. It is the difference in authority, and not just the difference in work, that undergirds the stability of the relationship between the two professions. The NP threatens to disrupt that stability. When registered nurses (RNs) become NPs, they are not just learning new skills; they are crossing lines of authority that they had previously learned to treat as constitutive of their profession. The chapter then looks at the voices and experiences of the NPs of Forest Grove Elder Services. Their narrated and actual practices negotiated physician authority in very different ways.

The Effect of Waking Suggestion on Post-Hypnotic Amnesia

1981 ◽  
Vol 11 (1) ◽  
pp. 44-46 ◽  
Author(s):  
D.P. Fourie
Keyword(s):  
Point Of View ◽  
The Other ◽  
Hypnotic Susceptibility ◽  
The Subject ◽  
The Mean ◽  
The Difference ◽  
The One ◽  
The Relationship ◽  
Female Subjects

It is increasingly realized that hypnosis may be seen from an interpersonal point of view, meaning that it forms part of the relationship between the hypnotist and the subject. From this premise it follows that what goes on in the relationship prior to hypnosis probably has an influence on the hypnosis. Certain of these prior occurences can then be seen as waking suggestionns (however implicitly given) that the subject should behave in a certain way with regard to the subsequent hypnosis. A study was conducted to test the hypothesis that waking suggestions regarding post-hypnotic amnesia are effective. Eighteen female subjects were randomly divided into two groups. The groups listened to a tape-recorded talk on hypnosis in which for the one group amnesia for the subsequent hypnotic experience and for the other group no such amnesia was suggested. Thereafter the Stanford Hypnotic Susceptibility Scale was administered to all subjects. Only the interrogation part of the amnesia item of the scale was administered. The subjects to whom post-hypnotic amnesia was suggested tended to score lower on the amnesia item than the other subjects, as was expected, but the difference between the mean amnesia scores of the two groups was not significant.

scholarly journals Revisiting the relationship between different financial risk measures and the market return on ordinary shares in South Africa

2015 ◽  
Vol 18 (2) ◽  
pp. 218-231
Author(s):  
Elda Du Toit
Keyword(s):  
South African ◽  
Financial Risk ◽  
Positive Relationship ◽  
Risk Measures ◽  
The United States ◽  
Expected Return ◽  
The Difference ◽  
The One ◽  
The Relationship ◽  
A Share

The main aim of this study was to test whether there is a positive relationship between different financial risk measures and the expected return of a share. This study was performed in 1995 by Brümmer and Wolmarans, who obtained results contrary to those of a similar study in the United States of America in 1988. The reasons for the difference were not established. This study follows up the one by Brümmer and Wolmarans to determine whether the passing of 19 years could have brought about any difference in the results. This process was initiated by testing a set of variables from a sample size of 107 JSE-listed companies from 2002 to 2012 for linearity. As there was no such linear relationship between any of the variables, no assumptions can be made about any relationship between share return and the risk measures tested here. If investors were risk averse, one would expect a positive relationship between different financial risk measures and the expected return of a share. This is not the case in the South African market.

Between Story and Narrated World: Reflections on the Difference between Homo- and Heterodiegesis

2014 ◽  
Vol 8 (2) ◽  
Author(s):  
Simone Elisabeth Lang
Keyword(s):  
Present Article ◽  
Literary Studies ◽  
Textual Interpretation ◽  
Different Types ◽  
The Difference ◽  
The One ◽  
The Relationship ◽  
Special Case ◽  
Shed Light ◽  
Theoretical Standpoint

AbstractIn describing the position of the narrator, research in literary studies generally follows Gérard Genette’s pioneering theory of narrative in distinguishing between the homo- and heterodiegetic type of narrator. This categorization is not sufficient to allow the position of the narrator to be described properly. The different ways in which the terms are used in literary studies reveal a shortcoming in the distinction behind them. Even in Genette’s work, there is a contradiction between the definition and the names of the two categories: Genette defines homo- and heterodiegesis with reference to the narrator’s presence in the narrated story, whereas he elsewhere states that the diegesis (in the sense of FrenchThe present article aims to do just that, starting from a theoretical standpoint. Thus, the different types of narrator that are possible are sketched in outline, and then explained with the help of examples.I begin by exposing the problems that result from using the terms in Genette’s manner (1), in order then to develop a list of possible narratorial standpoints based on the one hand on the involvement of the narratorial instance in the narrated world and on the other on its involvement in the story. By establishing separation of the two aspects as a ground rule in this way, a number of misunderstandings that are due to the varied ways in which the terminology has been used to date can be overcome.There follows a description of those cases that are unambiguously hetero- and homodiegetic (2), after which the problematic cases are considered (3), yielding the different types of homodiegetic narration that are possible. This latter set of distinctions will, like the others, shed light on the contours of the different narratorial positions and thus be capable of being put profitably into practice in textual interpretation. Accordingly, what is suggested is a way of using the terms that is first unambiguous and second beneficial to the interpretation of works, thus doing justice to the heuristic importance of narratology (see Kindt/Müller 2003; Stanzel 2002, 19).Thus, whereas the concept of diegesis provides the foundation for a distinction based on an ontological criterion that divides homo- and heterodiegesis from each other, the relationship between story and narrator is used to describe various types of homodiegetic narration. In the process, there come to light two types that are distinguished from each other by involvement in events (›homodiegetic, in the story‹ and ›homodiegetic, not in the story‹ narrators). If the narrator is not involved in events, the question arises of whether it would in principle have been possible for him to be involved in events, which is the norm with ›homodiegetic, not in the story‹ narrators, or whether a physical impossibility is the reason for his lack of involvement in the story. A special case of the ›homodiegetic, not in the story‹ narrator can be derived from this: peridiegetic narration: whereas narratorial instances of the ›homodiegetic, in the story‹ and ›homodiegetic, not in the story‹ types could in principle have been involved in the action and those of the ›homodiegetic, in the story‹ type actually were, peridiegetic narrators are marked by the fact that they cannot have been involved in the events.In summary, it will be shown that the concept of homodiegesis – in particular in the form in which it has previously been used, where links with the action and appearance in the story were not kept distinct – is in effect an umbrella term that brings together a number of possible forms. There is a prominent distinction between the ›homodiegetic, in the story‹ and the ›homodiegetic, not in the story‹ types of narrator (these types are represented in the present article by the old lawyer in Leo Perutz’s »The Beaming Moon« and the narrator who is a friend of Nathanael in E. T. A. Hoffmann’s »Sandman« respectively). The different degrees of homodiegetic narrator, which have often been mentioned in previous research and are defined by the strength of the character’s presence in the narrated world (from an uninvolved witness to an autodiegetic protagonist), are also to be situated between these two poles.It will also be shown in the process that the case of the narrator who is, for reasons of physical difference, not involved in events (the peridiegetic narrator) should be treated as a form of homodiegesis (for instance the schoolmaster in Theodor Storm’s

scholarly journals The action of potassium and other ions on the injury potential and action current in maia nerve

1934 ◽  
Vol 115 (793) ◽  
pp. 216-260 ◽  
Keyword(s):  
Electrolyte Solutions ◽  
Ion Concentration ◽  
Action Current ◽  
A Value ◽  
Physico Chemical ◽  
Wide Range ◽  
The Difference ◽  
Living Tissues ◽  
The Relationship ◽  
Injury Potential

The electric currents in living tissues have interested physiologists ever since their existence was proved by Du Bois Reymond, but little was done towards explaining their origin and magnitude on a quantitative physico-chemical basis befor the pioneer researches og J. S. Macdonald. Work previous to Macdonald's has discussed fully by that anuthor (1902), hence it will not be mentioned here. macdonald found that the injury potential of medullated nerve, either frog's or mammal's (1900, a, b ; 1902), could be given a value greater or smaller than the normal by simply altering the concentration of the solution in contact with the external surfaces of the fibres. He showed that solutions of NaOH, HCl, NaCl, or KCl affected the potential according to their concentrations and that the relationship between the two variables was a logarithmic one, which fact was in agreement with the then new theory of concentration cells developed by Nernst. Macdonald went on to point out (1902) that the effects of potassium chloride solutions were particularly interesting, and to suggest that the difference between the concentration of potassium in the axis cylinder of the nerve and in the surrounding blood or salt solution was wholly responsible for the observed injury potential. Over a wide range of concentration, 1/8 to 1 molar, he demonstrated that there was nearly a linear relation between the injury potential and the logarithm of the potassium ion concentration. However, since he simply varied the concentrations of his electrolyte solutions, and made no effort to maintain them isotonic with blood by the addition of a non-electrolyte, exception might be taken to some of his results on the ground that the effects were due in part to the passage of water into or out of the nerve with a consequent dilution or concentration of the plasma.

scholarly journals PENGARUH TERAPI MUROTTAL TERHADAP TINGKAT KONSENTRASI SISWA KELAS VIII. G DI MTSN 2 MUARA ENIM TAHUN 2018

2019 ◽  
Vol 9 (01) ◽  
pp. 44-48
Author(s):  
Shinta Maharani ◽  
Devy Dwi Putri
Keyword(s):  
Standard Deviation ◽  
Experimental Design ◽  
Average Concentration ◽  
A Value ◽  
Significant Difference ◽  
Before And After ◽  
Quasi Experimental ◽  
The Difference ◽  
The One ◽  
Mean Concentration

One of the tasks of the development of children aged 11-15 years is to think in a more abstract and logical way and more idealistic thinking. This ability to think will be disrupted if teenagers have difficulty concentrating during learning. Therefore we need a method that is fun and can make children relax in learning so that they can concentrate their concentration on ongoing learning. One method that can be used is the Murrotal Al-Qur'an therapy. The aim of the study was to determine whether there was any effect of murottal therapy on the concentration of students at Muara Enim 2 MTsN. This study used a quasi-experimental design with the design of the one group pretest posttest. The sample used was all students of class VIII.G at MTsN 2 Muara Enim. The results showed that the average concentration score of class VIII.G students before Murottal therapy was given was 10.84 with a standard deviation of 3.043. While the average concentration score of class VIII.G students after being given murottal therapy was 17.90 with a standard deviation of 1.233, so that the difference in mean concentration scores before and after murottal therapy was 7.06 with a standard deviation of 1.81. Wilcoxon signed ranks test obtained ρ value = 0,000, with a value of α = 0.05 (p <0.05), this shows that there is a significant difference between the concentration of students before and after being given murottal therapy. It is expected that the school can make a policy about the application of murottal therapy in increasing student concentration.

scholarly journals PELATIHAN MINDFULNESS UNTUK MENURUNKAN TINGKAT STRES PADA SISWI KELAS X

2020 ◽  
Vol 12 (2) ◽  
pp. 159-178
Author(s):  
Ulfa Noor Laili Uswatun Hasanah ◽  
Siti Muthia Dinni
Keyword(s):  
Experimental Research ◽  
Mindfulness Training ◽  
Test Method ◽  
Wilcoxon Test ◽  
Severe Stress ◽  
A Value ◽  
Stress Levels ◽  
Before And After ◽  
The Difference ◽  
Research Type

This study aims to determine the effect of mindfulness training to reduce the stress levels of 7 students in SMK X Pundong who have moderate to severe stress levels. The stress level was measured using the DASS scale. This research is categorized into experimental research type with one group pretest-posttest design. The data obtained were then analyzed using the non-parametric Wilcoxon test method to see the difference between students’ stress levels before and after the intervention through the IBM SPSS Statistics 25 for windows program. The results showed that there were significant differences in students’ stress levels before and after the intervention was given with a value of p = 0.018 (p <0.05). This proves that mindfulness training can reduce the stress levels of students in class X.

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