Swimming by the water mite Limnochares americana Lundblad (Acari, Parasitengona, Limnocharidae)

1977 ◽  
Vol 55 (12) ◽  
pp. 2050-2059 ◽  
Author(s):  
Bruce P. Smith ◽  
David Barr
Keyword(s):  
Phase Difference ◽  
Water Movement ◽  
Power Stroke ◽  
Water Mite ◽  
Free Swimming ◽  
The Third ◽  
The Right ◽  
And Control ◽  
Limnochares Americana ◽  
Visual Observations

Locomotory patterns of Limnochares americana were analyzed from visual observations and cinema and still photography. In free swimming it uses only the last two pairs of legs such that the third leg on the left side and the fourth leg on the right side are in phase and the third leg on the right side and fourth leg on the left side are in phase. Legs on opposite sides and successive legs on the same side show a phase difference of 0.5 cycle (180°). Orientation appears to be cued primarily by direction of illumination and water movement. The swimming hairs form collapsible blades that improve the efficiency of each leg in swimming. Manoeuvering and control of roll, pitch, and yaw are accomplished primarily by altering the direction of the power stroke of various legs as the distal segments are rotated at the trochantofemoral joint.

The Development and Setting of a Serpulid Worm, Hydroides norvegica Gunnerus (Polychaeta)

1958 ◽  
Vol 9 (3) ◽  
pp. 351 ◽  
Author(s):  
B Wisely
Keyword(s):  
Free Swimming ◽  
Searching Behaviour ◽  
The Third ◽  
The Right ◽  
Young Worm

Hydroides norvegica larvae were reared to settling in 8-10 days at 20°C. The paired conical processes on the collar setae characteristic of the genera Hydroides and Serpula were developed in the larvae by the sixth day. Settling differed from that recorded for other larvae in that (i) larvae could become attached to surfaces comparatively early in their free-swimming life, (ii) "searching" behaviour followed by settling on a particular locus was not observed, (iii) feeding continued through metamorphosis. The primary operculum of the young worm was formed by modification of the third branchial filament of the left side. Certain identification as H. norvegica could not be made until this had been shed and replaced by a secondary operculum developed from the right side 4-8 weeks after metamorphosis.

The Unit of Analysis in Field Research: Issues and Approaches to Design and Data Analysis

1998 ◽  
Vol 17 (3) ◽  
pp. 270-284 ◽  
Author(s):  
Stephen Silverman ◽  
Melinda Solmon
Keyword(s):  
Data Analysis ◽  
Burden Of Proof ◽  
Field Research ◽  
Random Assignment ◽  
Research Issues ◽  
Unit Of Analysis ◽  
The Third ◽  
Unit Of Measurement ◽  
The Right ◽  
And Control

This paper addresses the appropriate unit of analysis in field research. We first discuss the issues related to this topic: (a) unit of measurement versus unit of analysis, (b) treatments and random assignment, (c) independence of observations, (d) moderating and control variables, and (e) correlational versus experimental research. We then present a model for determining the correct unit of analysis. In many instances, researchers should use class means or subgroup means, and this has implications for research design. In the third section, we discuss the related issues of (a) the burden of proof, (b) asking the right questions and getting the right answers, and (c) completing statistical analyses. How data are analyzed can affect the results, and researchers should consider these issues when planning their research.

Part III Constituting Democracy, Ch.12 Elections

2016 ◽  
Author(s):  
Sondhi Aditya
Keyword(s):  
Campaign Finance ◽  
Election Law ◽  
Electoral Process ◽  
Indian Constitution ◽  
Electoral Roll ◽  
Second Stage ◽  
The Third ◽  
The Right ◽  
And Control ◽  
Election Commission

This chapter examines India’s constitutional framework and its mechanisms that govern and control the electoral process, especially those that go beyond the domain of election law and raise a host of constitutional issues. Before discussing these mechanisms, their operation, and the extent to which they are justifiable, the chapter provides an overview of the right to vote and how it is treated in the Indian Constitution as a fundamental right. It then considers the Election Commission and its duties and functions, and proceeds by outlining the three levels by which elections are regulated in India: the first relates to the preparation of the electoral roll; the second stage to the electoral process; and the third to the outcome and verdict. Finally, it looks at potential challenges to free and fair elections, such as those posed by the problem of campaign finance.

Lobster righting responses and their neural control

1968 ◽  
Vol 170 (1021) ◽  
pp. 435-456 ◽  
Keyword(s):  
High Speed ◽  
Neural Control ◽  
Homarus Americanus ◽  
Power Stroke ◽  
Return Stroke ◽  
Power And Control ◽  
Basic Power ◽  
The Right ◽  
And Control ◽  
Stroke Cycle

This paper reports a behavioural analysis of the movements and righting responses of the abdominal pleopods (swimmerets) and uropods (tail fans) of the lobster Homarus americanus . The movements of individual swimmerets, studied from high-speed motion pictures, consist of a basic power stroke–return stroke cycle, upon which other cyclic power and control movements are superimposed. Tilting a lobster around the long axis of its body initiates bilaterally asymmetrical swimmeret beating. The swimmerets on the side tilted upward beat out toward the side, while those on the side tilted downward beat either straight to the rear, or not at all. These bilaterally asymmetrical swimmeret movements produce a cyclic righting torque around the long axis of the lobster’s body. The peak-to-peak amplitude of this torque is directly proportional to the frequency of swimmeret beating. The characteristics of the righting torque were related to the movements of individual swimmerets. Tilting a lobster around its long axis also evokes bilaterally asymmetrical uropod movements. The uropod on the side tilted downward is spread open, while the uropod on the side tilted upward is closed. It is argued that these movements also contribute to the production of righting torque. The righting responses of both the swimmerets and the uropods are controlled exclusively by the statocyst receptors. The position and acceleration receptors of the statocysts probably both participate in the control of the responses. Destroying one statocyst shifts the position of symmetry for the swimmerets and uropods from upright to 20° toward the injured side. Either the right or left statocyst can alone control the righting responses of the uropod and swimmerets of either side, however, even though the afferent responses of the two statocysts to roll in one direction are opposite. Neural models based on the bilaterally reciprocal organization of statocyst influences are proposed to explain these findings.

Eosinophilic vasculitis: an inhabitual and resistant manifestation of a vasculitis

VASA ◽  
2010 ◽  
Vol 39 (4) ◽  
pp. 344-348 ◽  
Author(s):  
Jandus ◽  
Bianda ◽  
Alerci ◽  
Gallino ◽  
Marone
Keyword(s):  
Skin Biopsy ◽  
Intravenous Iron ◽  
Small Vessel Vasculitis ◽  
High Dose ◽  
Raynaud Phenomenon ◽  
The Third ◽  
Left Elbow ◽  
Right Hand ◽  
The Right ◽  
Trunk Skin

A 55-year-old woman was referred because of diffuse pruritic erythematous lesions and an ischemic process of the third finger of her right hand. She was known to have anaemia secondary to hypermenorrhea. She presented six months before admission with a cutaneous infiltration on the left cubital cavity after a paravenous leakage of intravenous iron substitution. She then reported a progressive pruritic erythematous swelling of her left arm and lower extremities and trunk. Skin biopsy of a lesion on the right leg revealed a fibrillar, small-vessel vasculitis containing many eosinophils.Two months later she reported Raynaud symptoms in both hands, with a persistent violaceous coloration of the skin and cold sensation of her third digit of the right hand. A round 1.5 cm well-delimited swelling on the medial site of the left elbow was noted. The third digit of her right hand was cold and of violet colour. Eosinophilia (19 % of total leucocytes) was present. Doppler-duplex arterial examination of the upper extremities showed an occlusion of the cubital artery down to the palmar arcade on the right arm. Selective angiography of the right subclavian and brachial arteries showed diffuse alteration of the blood flow in the cubital artery and hand, with fine collateral circulation in the carpal region. Neither secondary causes of hypereosinophilia nor a myeloproliferative process was found. Considering the skin biopsy results and having excluded other causes of eosinophilia, we assumed the diagnosis of an eosinophilic vasculitis. Treatment with tacrolimus and high dose steroids was started, the latter tapered within 12 months and then stopped, but a dramatic flare-up of the vasculitis with Raynaud phenomenon occurred. A new immunosupressive approach with steroids and methotrexate was then introduced. This case of aggressive eosinophilic vasculitis is difficult to classify into the usual forms of vasculitis and constitutes a therapeutic challenge given the resistance to current immunosuppressive regimens.

Rancang Bangun Sistem Penerimaan Dan Mutasi Barang Pada PDAM Tirta Kerta Raharja

Sensi Journal ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 236-246
Author(s):  
Ilamsyah Ilamsyah ◽  
Yulianto Yulianto ◽  
Tri Vita Febriani
Keyword(s):  
System Analysis ◽  
Object Oriented ◽  
Analysis Method ◽  
Web Based ◽  
Visual Modeling ◽  
Long Time ◽  
The Right ◽  
And Control ◽  
Web Based System ◽  
The Web

The right and appropriate system of receiving and transferring goods is needed by the company. In the process of receiving and transferring goods from the central warehouse to the branch warehouse at PDAM Tirta Kerta Raharja, Tangerang Regency, which is currently done manually is still ineffective and inaccurate because the Head of Subdivision uses receipt documents, namely PPBP and mutation of goods, namely MPPW in the form of paper as a submission media. The Head of Subdivision enters the data of receipt and mutation of goods manually and requires a relatively long time because at the time of demand for the transfer of goods the Head of Subdivision must check the inventory of goods in the central warehouse first. Therefore, it is necessary to hold a design of information systems for the receipt and transfer of goods from the central warehouse to a web-based branch warehouse that is already database so that it is more effective, efficient and accurate. With the web-based system of receiving and transferring goods that are already datatabed, it can facilitate the Head of Subdivision in inputing data on the receipt and transfer of goods and control of stock inventory so that the Sub Head of Subdivision can do it periodically to make it more effective, efficient and accurate. The method of data collection is done by observing, interviewing and studying literature from various previous studies, while the system analysis method uses the Waterfall method which aims to solve a problem and uses design methods with visual modeling that is object oriented with UML while programming using PHP and MySQL as a database.

THE FACTORS OF CAREER SELF-DETERMINATION OF STUDENTS OF HIGHER EDUCATION INSTITUTIONS

2019 ◽  
Vol 7 (1) ◽  
pp. 9-20
Author(s):  
Inna Yeung
Keyword(s):  
Higher Education ◽  
Higher Education Institutions ◽  
Well Being ◽  
Young Person ◽  
Self Determination ◽  
Full Time ◽  
Actual Problem ◽  
The Third ◽  
The Right

Choice of profession is a social phenomenon that every person has to face in life. Numerous studies convince us that not only the well-being of a person depends on the chosen work, but also his attitude to himself and life in general, therefore, the right and timely professional choice is very important. Research about factors of career self-determination of students of higher education institutions in Ukraine shows that self-determination is an important factor in the socialization of young person, and the factors that determine students' career choices become an actual problem of nowadays. The present study involved full-time and part-time students of Institute of Philology and Mass Communications of Open International University of Human Development "Ukraine" in order to examine the factors of career self-determination of students of higher education institutions (N=189). Diagnostic factors of career self-determination of students studying in the third and fourth year were carried out using the author's questionnaire. Processing of obtained data was carried out using the Excel 2010 program; factorial and comparative analysis were applied. Results of the study showed that initial stage of career self-determination falls down on the third and fourth studying year at the university, when an image of future career and career orientations begin to form. At the same time, the content of career self-determination in this period is contradictory and uncertain, therefore, the implementation of pedagogical support of this process among students is effective.

PENERAPAN PERSEPSI ORANGTUA DALAM MEMENUHI HAK PARTISIPASI ANAK USIA 9-12 TAHUN DI DESA BENA AMANUBAN SELATAN NUSA TENGGARA TIMUR

2019 ◽  
Vol 1 (2) ◽  
pp. 121-138
Author(s):  
Lodiana Nitti ◽  
Friandry Windisany Thoomaszen
Keyword(s):  
Qualitative Research ◽  
Research Methods ◽  
Growth And Development ◽  
Data Retrieval ◽  
Qualitative Research Methods ◽  
Parental Perception ◽  
The Third ◽  
Self Interest ◽  
Participation Rights ◽  
The Right

ABSTRACT Parental perception will affect the fulfillment of children’s participation rights. Fullfilment of children’s participation rights will be fulfilled optimally if parents pay anttention to opinions while providing opportunities for children to make and make decisions about the child’s goals and self-interest. The subjects studied consisted of 5 subjects consisting of father and mother who had children aged 9- 12 years. This study uses qualitative research methods, with data retrieval tools in teh form of interviews, observation and documentation. From the research found data were the subjects do not fulfill the right of participation of children up to the maximum ladder where children’s participation rights range from the first ladder to the third ladder. The first ladder to the third ladder is actually a non- participating ladder. This means that children is manipulated, dominated by parents, there is direct communation and the severity of the parent. The children felt disappointed, sad, and angry with the parents but they still tried to hear and obey the parent’s decision. Children from third and fourth subjects experienced excessive fear to speak to their parent (father). Suggestions for parents to be more caring and fulfill the rights of children’s participation so as not to affect the growth and development of children. Keywords: participation rights, children, parents

THE EFFECT OF APPLYING DEMONSTRATION METHOD ON STUDENTS’ ACHIEVEMENT IN SPEAKING SKILL AT THE THIRD GRADE OF SMK PAB 3 MEDAN ESTATE

2015 ◽  
Vol 4 (2) ◽  
Author(s):  
Meryanti Napitupulu And Anni Holila Pulungan
Keyword(s):  
High School ◽  
Control Group ◽  
Vocational High School ◽  
Control Groups ◽  
Speaking Test ◽  
The Third ◽  
Speaking Skill ◽  
The Subject ◽  
And Control ◽  
Experimental Group

This study was conducted as an attempt to discover the effect of applying Demonstration Method on students’ achievement in speaking skill. It was an experimental research. The subject was students of Grade XII, Vocational High School (Sekolah Menengah Kejuruan: SMK), which consisted of 79 students. The research was divided into two groups: experimental and control groups. The instrument used to collect the data was speaking test. To obtain the reliability of the test, the writer applied Kuder Richardson 21 formula. The result of the reliability was 0.7, and it was found that the test was reliable. The data were analyzed by using t-test formula. The analysis showed that the scores of the students in the experimental group were significantly higher than the scores of the students in the control group at the level of significant m = 0.05 with the degree of freedom (df) 77, t-observed value 8.9 > t-table value 1.99. The findings indicate that using Demonstration Method significantly affected the students’ achievement in speaking skill. So, English teachers are suggested to use Demonstration Method in order to improve students’ achievement in speaking skill.

EFEKTIVITAS METODE DEMONSTRASI DALAM MENINGKATKAN HASIL BELAJAR SISWA SEKOLAH MENENGAH KEJURUAN PADA PENGAJARAN SISTEM KOLOID

2013 ◽  
Vol 19 (1) ◽  
pp. 28
Author(s):  
Hamda Situmorang ◽  
Manihar Situmorang
Keyword(s):  
High School ◽  
High School Students ◽  
Abstract Concept ◽  
Vocational High School ◽  
School Students ◽  
Lecture Method ◽  
Colloid System ◽  
Before And After ◽  
The Right ◽  
And Control

Abstract Implementation of demonstration method in the teaching of chemistry is assigned as the right strategy to improve students’ achievement as it is proved that the method can bring an abstract concept to reality in the class. The study is conducted to vocational high school students in SMKN1 Pargetteng getteng Sengkut Pakfak Barat at accademic year 2013. The teaching has been carried out three cycles on the teaching of chemistry topic of colloid system. In the study, the class is divided into two class, experiment class and control class. The demontration method is used to teach students in experimental class while the teaching in control class is conducted with lecture method. Both are evaluated by using multiple choise tests before and after the teaching procedures, and the ability of students to answer the problems are assigned as students’ achievements. The results showed that demonstration method improved students’ achievement in chemistry. The students in experimental class who are taughed with demonstration method (M=19.08±0.74) have higher achievements compare with control class (M=12.91±2.52), and both are significantly different (tcalculation 22.85 > ttable 1.66). The effectivity of demostration method in experimental class (97%) is found higer compare to conventional method in control class (91%).

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