Analytical structural behaviour of elastic flapping wings under the actuator effect

2018 ◽  
Vol 122 (1254) ◽  
pp. 1176-1198
Author(s):  
H. Zare ◽  
Seid H. Pourtakdoust ◽  
A. Bighashdel
Keyword(s):  
Conceptual Understanding ◽  
Body Motion ◽  
Flapping Wings ◽  
Inertial Forces ◽  
Structural Behaviour ◽  
Initial Value ◽  
Sinusoidal Motion ◽  
Structural Responses ◽  
First Time

ABSTRACTThe effect of inertial forces on the Structural Dynamics (SD) behaviour of Elastic Flapping Wings (EFWs) is investigated. In this regard, an analytical modal-based SD solution of EFW undergoing a prescribed rigid body motion is initially derived. The formulated initial-value problem is solved analytically to study the EFW structural responses, and sensitivity with respect to EFWs’ key parameters. As a case study, a rectangular wing undergoing a prescribed sinusoidal motion is simulated. The analytical solution is derived for the first time and helps towards a conceptual understanding of the overall EFW's SD behaviour and its analysis required in their designs. Specifically, the EFW transient and steady response in on-off servo condition is also attended.

Islamic and Jewish Religious Feminists Tackle Islamic and Jewish Oral Law: Maintenance and Rebellion of Wives

2017 ◽  
Vol 11 (1) ◽  
pp. 35-63
Author(s):  
Ruth Roded
Keyword(s):  
State Policy ◽  
Political System ◽  
Daily Life ◽  
The State ◽  
The Political ◽  
Jewish Law ◽  
Modern Times ◽  
Parallel Case ◽  
First Time

Beginning in the early 1970s, Jewish and Muslim feminists, tackled “oral law”—Mishna and Talmud, in Judaism, and the parallel Hadith and Fiqh in Islam, and several analogous methodologies were devised. A parallel case study of maintenance and rebellion of wives —mezonoteha, moredet al ba?ala; nafaqa al-mar?a and nush?z—in classical Jewish and Islamic oral law demonstrates similarities in content and discourse. Differences between the two, however, were found in the application of oral law to daily life, as reflected in “responsa”—piskei halacha and fatwas. In modern times, as the state became more involved in regulating maintenance and disobedience, and Jewish law was backed for the first time in history by a state, state policy and implementation were influenced by the political system and socioeconomic circumstances of the country. Despite their similar origin in oral law, maintenance and rebellion have divergent relevance to modern Jews and Muslims.

scholarly journals Erratum: Gravrok, J., et al. Beyond the Benefits of Assistance Dogs: Exploring Challenges Experienced by First-Time Handlers. Animals 2019, 9, 203

Animals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 237
Author(s):  
Jennifer Gravrok ◽  
Dan Bendrups ◽  
Tiffani Howell ◽  
Pauleen Bennett
Keyword(s):  
Assistance Dogs ◽  
First Time

The authors wish to make the following corrections [1]:In Table 1, under case study 4, the code was originally labeled as H8, P8 and ADI 8; these labels should be H4, P4 and ADI 4, respectively [...]

scholarly journals Stimulating Mechanistic Reasoning in Physics Using Student-Constructed Stop-Motion Animations

2021 ◽  
Author(s):  
Rayendra Wahyu Bachtiar ◽  
Ralph F. G. Meulenbroeks ◽  
Wouter R. van Joolingen
Keyword(s):  
Conceptual Understanding ◽  
Physical Phenomenon ◽  
Ninth Grade ◽  
Abstract Concepts ◽  
Projectile Motion ◽  
Mechanistic Reasoning ◽  
Stop Motion ◽  
Ninth Grade Students ◽  
Scientific Phenomena

AbstractThis article reports on a case study that aims to help students develop mechanistic reasoning through constructing a model based stop-motion animation of a physical phenomenon. Mechanistic reasoning is a valuable thinking strategy for students in trying to make sense of scientific phenomena. Ten ninth-grade students used stop-motion software to create an animation of projectile motion. Retrospective think-aloud interviews were conducted to investigate how the construction of a stop-motion animation induced the students’ mechanistic reasoning. Mechanistic reasoning did occur while the students engaged in creating the animation, in particular chunking and sequencing. Moreover, all students eventually exhibited mechanistic reasoning including abstract concepts, e.g., not directly observable agents. Students who reached the highest level of mechanistic reasoning, i.e., chaining, demonstrated deeper conceptual understanding of content.

scholarly journals Investigating the Concerns of First-Time Distance Education Instructors

2019 ◽  
Vol 20 (5) ◽  
Author(s):  
Halil Kayaduman ◽  
Turgay Demirel
Keyword(s):  
Distance Education ◽  
Content Knowledge ◽  
Stages Of Concern ◽  
Concerns Based Adoption Model ◽  
Descriptive Case Study ◽  
Time Distance ◽  
Adaptation Processes ◽  
First Time ◽  
Ongoing Concern

The purpose of the study is to investigate the concern developments of first-time distance education instructors using the concerns-based adoption model (CBAM). This study used stages of concern (SoC), a component of CBAM, as its theoretical framework. A descriptive case study was implemented, which focused on the adaptation processes of nine instructors lecturing for the first time via distance education. The instructors attended a two-day training, which was designed based on their initial concerns. Then instructors implemented their courses for four weeks via distance education. While the informational and personal stages (self-concerns) decreased compared to the initial findings, the consequence stage increased in intensity. However, self-concerns remained predominant in the process despite the reduction in self-concerns and increase in the consequence stage. Based on the findings, the implications for distance education and recommendations for addressing the instructors’ concerns are discussed. Recommendations for alleviating the concerns of first-time distance education instructors include: the provision of ongoing concern-based interventions that incorporate technological, pedagogical, and content knowledge; providing working examples related to distance education from which instructors can learn vicariously; and encouraging collaboration among instructors.

scholarly journals Bearing Severity Fault Evaluation Using Contour Maps—Case Study

2021 ◽  
Vol 11 (14) ◽  
pp. 6452
Author(s):  
César Ricardo Soto-Ocampo ◽  
Juan David Cano-Moreno ◽  
José Manuel Mera ◽  
Joaquín Maroto
Keyword(s):  
Health Indicators ◽  
Bearing Faults ◽  
Contour Maps ◽  
Initial Stage ◽  
Critical Components ◽  
Bearing Damage ◽  
First Time ◽  
Current Operating

Increasing industrial competitiveness has led to an increased global interest in condition monitoring. In this sector, rotating machinery plays an important role, where the bearing is one of the most critical components. Many vibration-based signal treatments are already being used to identify features associated with bearing faults. The information embedded in such features are employed in the construction of health indicators, which allow for evaluation of the current operating status of the machine. In this work, the use of contour maps to represent the diagnosis map of a bearing, used as a health map, is presented for the first time. The results show that the proposed method is promising, allowing for the satisfactory detection and evaluation of the severity of bearing damage. In this initial stage of the research, our results suggest that this method can improve the classification of bearing faults and, therefore, optimise maintenance processes.

Are seasonal lakes as productive as permanent lakes? A case study from Ireland

2010 ◽  
Vol 67 (8) ◽  
pp. 1291-1302 ◽  
Author(s):  
Helder Cunha Pereira ◽  
Norman Allott ◽  
Catherine Coxon
Keyword(s):  
Seasonal Variation ◽  
Linear Regression ◽  
Chlorophyll A ◽  
Algal Biomass ◽  
P Limitation ◽  
Underlying Causes ◽  
Western Ireland ◽  
Log Linear ◽  
First Time

This paper compares, for the first time, nutrient levels and chlorophyll a measured in a set of seasonal lakes with those reported for permanent lakes in the literature. Twenty-two turloughs (karstic seasonal lakes) in western Ireland were sampled monthly from the onset of flooding (October) until they dried out (6 to 9 months). The turloughs showed similar levels of nutrients and chlorophyll a to those reported for Irish and international lakes. Chlorophyll a peaked between November and February in the majority of turloughs, sometimes with values higher than those measured in mesotrophic lakes in summer. A significant log-linear regression was found between total phosphorus and chlorophyll a, which suggests P limitation of algal biomass in the majority of the turloughs. The regression characteristics were not significantly different than those described in similar studies of permanent lakes. Patterns in seasonal variation of nutrients are also presented, their underlying causes being discussed in relation to their transport within catchments. Our results show that despite being predominantly winter phenomena, turloughs can be as productive as permanent lakes.

Dispute Settlement of Diplomatic Relation Reviewed In International Law (Case Study of Spionageburning Australia on The President of Indonesia)

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Muhammad Iqbal Baiquni
Keyword(s):  
International Relations ◽  
International Law ◽  
Dispute Settlement ◽  
Code Of Conduct ◽  
Qualitative Approach ◽  
Legal Research ◽  
Bilateral Relations ◽  
Final Settlement ◽  
First Time

<div><p class="abstract">The case of espionage or spying by Australia against Indonesia is not the first time, but there have been several attempts of espionage against Indonesia. This espionage act is an act of secretly collecting intelligence data in international relations in a country. In this paper, we discuss the wiretapping case and its resolution. This paper uses normative legal research with a qualitative approach. This paper examines the chronology of cases of tapping by Australia against Indonesia, wiretapping in human rights and international law, as well as the final settlement of tensions between Indonesia and Australia through an agreement on the Code of Conduct to normalize bilateral relations between the two countries.</p></div>

Beneficial effect of lithium in female patient with bipolar affective illness and psoriasis

2021 ◽  
Vol 37 (2) ◽  
Author(s):  
Przemysław Filipiak ◽  
Anna Jaskóła ◽  
Karolina Gattner
Keyword(s):  
Bipolar Disorder ◽  
Case Report ◽  
Beneficial Effect ◽  
Female Patient ◽  
Lithium Treatment ◽  
The Other ◽  
Patient Needs ◽  
Affective Illness ◽  
First Time

Objectives. Psoriasis makes a relative contraindication for lithium treatment which can exacerbate its symptoms or induce it itself. On the other hand, lithium exerts immuno-modulatory activity. Case study. In this paper, a case of a female patient is presented. The patient has been treated since 2012 for bipolar affective illness (bipolar disorder – BD) and psori­asis, which occurred for the first time during a depress­ive episode. Despite intensive pharmacological treatment, both as inpatient and outpatient, a satisfactory improvement of affective illness has not been obtained. After the introduction of lithium, a remission of BD was achieved as well as a reduction of psoriatic changes, which have been maintained until now (2021). Conclusion. The remission of Bipolar Disorder (BD) on lithium can suggest that the patient belongs to the group of the so-called excellent lithium responders. In the presen­ted case remission of psoriasis was observed during lithium treatment. This case report must be treated with caution because remission could be spontaneous and the patient needs further observation.

scholarly journals Rating Effective Factors on Motivating Employees for Job Persistence by Using Fuzzy AHP Method: A Case Study among the Employees of the Deqat Khodro Kousha (IPACO) Company

2016 ◽  
Vol 12 (7) ◽  
pp. 159
Author(s):  
Seyed Mehdi Khadem ◽  
Darush Rahmati ◽  
Ali Yavari ◽  
Seyed Ehsan Etemadifar ◽  
Alireza Eftekharian
Keyword(s):  
Human Resources ◽  
Fuzzy Ahp ◽  
Field Research ◽  
Ahp Method ◽  
Financial Status ◽  
Effective Factors ◽  
Needed Information ◽  
Library Research ◽  
First Time

The goal of this research is to prioritize effective factors on motivating employees to keep on working and determining the most important effective factors on the employees' motivation. In this paper, to grade effective factors on the employees' motivation for keeping on to work, the Fuzzy AHP method, which is one of the multi-standard decision-making methods was utilized. Field research and library research methods were used for collecting the needed information.  Results indicated that among the effective factors on the employees' motivation for job persistence, the health factor is the most important and financial status is the second most important factor. The least importance is given to the significance of the work for that person. In this paper, the effective factors on the employees' motivation for job persistence were rated for the first time. Results of this research are very useful in devising strategies that are related to keeping employees for the human resources' executives. The results of this paper are not applicable to all organizations. Furthermore, in this research, only the factors with positive impacts on employees for job persistence were rated.

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