The Physical Basis of Astro-Navigation in Birds: Theoretical Considerations

1960 ◽  
Vol 37 (3) ◽  
pp. 573-593 ◽  
Author(s):  
C. J. PENNYCUICK
Keyword(s):  
Experimental Evidence ◽  
Rate Of Change ◽  
Physical Basis ◽  
Original Form ◽  
Theoretical Considerations ◽  
The Way

1. Matthews's hypothesis of sun navigation in its original form is rejected on the grounds of physical impossibility of making one of the measurements, and an invalid assumption in the reasoning. 2. It is suggested that the bird should measure the sun's altitude and rate of change of altitude. The position lines corresponding to these quantities are discussed, and the way in which birds might make and use such observations is considered. 3. The sensory performance required is shown to be reasonable. 4. The magnitude and direction of the errors of position resulting from various sorts of errors of observation are discussed in relation to the experimental evidence. 5. Suggestions are put forward for future experiments.

scholarly journals Oversized Area Indications on Bonus Packs Fail to Affect Consumers’ Transactional Decisions—More Experimental Evidence on the Mars Case

2021 ◽  
Author(s):  
K. P. Purnhagen ◽  
E. van Herpen ◽  
S. Kamps ◽  
F. Michetti
Keyword(s):  
Experimental Evidence ◽  
Empirical Evidence ◽  
Current Paper ◽  
Legal Interpretation ◽  
Eu Legislation ◽  
Behavioural Research ◽  
Actual Choice ◽  
Unfair Commercial Practices Directive ◽  
Legal Sense ◽  
The Way

AbstractFindings from behavioural research are gaining increased interest in EU legislation, specifically in the area of unfair commercial practices. Prior research on the Mars case (Purnhagen and van Herpen 2017) has left open whether empirical evidence can provide an indication that this practice of using oversized indications of additional volume alters the transactional decision of consumers. This, however, is required to determine the “misleadingness” of such a practice in the legal sense as stipulated by the Unfair Commercial Practices Directive 2005/29/EC. The current paper closes this gap by illustrating how behavioural research can inform legal interpretation. In particular, it extends the previous research in two important ways: first, by examining the actual choice that people make; and second, by investigating whether the effects remain present in a context where a comparison product is available. Yet, while supporting and extending the findings of the study from Purnhagen and van Herpen (2017) on deceptiveness, the current study could not produce empirical evidence of a clear influence on the transactional decision of consumers, in the way “UCPD” requires.

III.—On the Original Form of Sedimentary Deposits

1903 ◽  
Vol 10 (1) ◽  
pp. 12-18 ◽  
Author(s):  
J. F. Blake
Keyword(s):  
Essential Elements ◽  
Original Form ◽  
Sedimentary Deposits ◽  
Sea Bottom ◽  
Theoretical Considerations ◽  
Theoretical Results

The form of the deposits that are taking place on the sea-bottom at the present day is one of the essential elements required to be known when we wish to interpret the submarine contours, as throwing light on the submergence or elevation of the land in late geological times, or when we propose to use the variation of thickness of the strata deposited during any epoch as an indication of the position of the shore-lines at that time.In the case of deposits in small or temporary masses of water, their form and arrangement may sometimes be observed directly; but in the case of the deposits in the sea, where we can neither remove the water nor make borings beneath it, we can only avail ourselves of theoretical considerations.It might have been expected that the original form of various sedimentary deposits would have been considered in detail long ago, but as a matter of fact the few writers who have touched upon the question have mostly been content with the assumption that deposits taken as a whole are thickest near the source of supply, and the figures given in illustration of the arrangement of various kinds, and thereby the shape of each, are remarkable for their variety.As the theoretical results at which I have arrived differ fundamentally from the ordinary assumptions, it is to be hoped that some one will be able to point out the fallacy, if any, which has led me astray, and to explain more satisfactorily the observed features which appear to confirm the theory.

scholarly journals Regiospecificty in the heterocyclization of β-oxonitriles to 5-substituted 4-oxothiazolidine derivatives

2003 ◽  
Vol 68 (4-5) ◽  
pp. 383-390 ◽  
Author(s):  
Rade Markovic ◽  
Zdravko Dzambaski ◽  
Milovan Stojanovic ◽  
Peter Steel ◽  
Marija Baranac
Keyword(s):  
Experimental Evidence ◽  
Reasonable Explanation ◽  
Theoretical Considerations ◽  
Derivatives Of

Astudy on the regiospecificity of the base-catalyzed reaction of activated ?-oxonitriles 1 with diethyl mercaptosuccinate affording the title compounds 3 is reported. Other competitive heterocyclic products, that is 4-oxo-1,3-thiazinanes 4, derivatives of tetrahydrothiophene 5 and/or thiacyclohexane 6 which on the grounds of mechanistic considerations could be formed, were not observed. Spectroscopic and experimental evidence together with theoretical considerations, provides a reasonable explanation for the observed regiospecificity.

Religion

2021 ◽  
pp. 301-317
Author(s):  
Alessandro Vettori
Keyword(s):  
Original Form ◽  
Spiritual Renewal ◽  
Transformative Power ◽  
Female Role ◽  
Final Destination ◽  
Spiritual Authority ◽  
Ubertino Da Casale ◽  
The Church ◽  
The Way

This chapter explores the way in which Dante forges an original form of religiosity in his work by embracing Franciscan and apocalyptic ideas. It focuses on three aspects: the prophetic spirit that animates Dante’s critique of the Church and his call for spiritual renewal; his emphasis on the transformative power of prayer and its role in the poet’s construction of his spiritual authority; and the celebration of the female role in salvation through the figures of Lady Poverty and Beatrice. Franciscan thought on Poverty, from Joachim of Flora to radicals such as Ubertino da Casale and Peter John Olivi, informs Dante’s theological (but also political and spiritual) reflections on religion. Moreover, Dante’s personal exile becomes a metaphor for Christian peregrinations on earth, a figura of homo viator’s pilgrimage toward the final destination in the afterlife.

The influence of scientific knowledge on mollusk and arthropod illustration

2021 ◽  
Author(s):  
Consuelo Sendino
Keyword(s):  
Nineteenth Century ◽  
Scientific Knowledge ◽  
Original Form ◽  
General Shape ◽  
New Techniques ◽  
History Of ◽  
Over Time ◽  
The Way

ABSTRACT Our attraction to fossils is almost as old as humans themselves, and the way fossils are represented has changed and evolved with technology and with our knowledge of these organisms. Invertebrates were the first fossils to be represented in books and illustrated according to their original form. The first worldwide illustrations of paleoinvertebrates by recognized authors, such as Christophorus Encelius and Conrad Gessner, considered only their general shape. Over time, paleoillustrations became more accurate and showed the position of organisms when they were alive and as they had appeared when found. Encyclopedic works such as those of the Sowerbys or Joachim Barrande have left an important legacy on fossil invertebrates, summarizing the knowledge of their time. Currently, new discoveries, techniques, and comparison with extant specimens are changing the way in which the same organisms are shown in life position, with previously overlooked taxonomically important elements being displayed using modern techniques. This chapter will cover the history of illustrations, unpublished nineteenth-century author illustrations, examples showing fossil reconstructions, new techniques and their influence on taxonomical work with regard to illustration, and the evolution of paleoinvertebrate illustration.

1. The UK Constitution

Public Law ◽  
2018 ◽  
Author(s):  
John Stanton ◽  
Craig Prescott
Keyword(s):  
Final Section ◽  
System P ◽  
The Uk ◽  
Theoretical Considerations ◽  
The Way

This chapter provides an introduction to the UK Constitution and sets out a foundation upon which discussions in later chapters further develop. It starts by exploring definitions of constitutions, placing the unique UK system within commonly accepted themes and characteristics. It then moves to explain the nature and form of the UK Constitution and some of the sources of which it is constructed, as well as exploring some of the more theoretical considerations as regards its character, including the way in which it is legitimised. The final section entertains academic questions concerning whether or not the UK can be said to have a constitution, including discussion of the case for and against a codified system.

Theoretical Considerations on the Way to Becoming a Psychotherapist

2017 ◽  
Vol 61 (0) ◽  
pp. 119-0
Author(s):  
Andrea Rosa
Keyword(s):  
Psychology Students ◽  
Ethical Challenge ◽  
Narrative Approach ◽  
Human Relations ◽  
Shared Experience ◽  
Theoretical Approaches ◽  
The Relationship ◽  
Theoretical Considerations ◽  
Psychotherapeutic Training ◽  
The Way

This paper aims to recount a shared experience of some psychology students – an intellectual adventure of exploring one’s own approach towards human relations and nature on the way to becoming a psychotherapist. To become practitioners, the students need to choose a certain psychotherapeutic training based on one of the main psychotherapeutic theoretical approaches. The following are mentioned in this paper: psychoanalysis, cognitivebehavioral therapy, humanistic/existential and the postmodern narrative approach. Exploring the assumptions underlying different modalities and practices is also considered here to be an ethical challenge. It is reckoned that the choice of a specific psychotherapeutical practice bound to a theory shapes the identity of the therapist and the patients, forms the language and behaviour through which the future therapist will express his own Self and influence the Other. Referring to postmodern inspirations, the author speaks in favour of making an endless effort of recognizing the assumptions underlying different practices – as the only way for not taking a potentially violent and impervious attitude in the relationship between the therapist and the patient.

The dissociation of dolomite. II

1926 ◽  
Vol 21 (112) ◽  
pp. 21-24 ◽  
Author(s):  
Cecil S. Garnett
Keyword(s):  
Experimental Evidence ◽  
Close Agreement ◽  
Chemical Society ◽  
Related Subject ◽  
The Subject ◽  
The Way

In this paper further evidence is put forward in support of a previous paper on the subject. Very soon after the reading of that paper, A. E. Mitchell read a paper before the Chemical Society on a closely related subject. Working quite independently, and employing other methods of investigation, Mitchell arrived at conclusions in close agreement with those detailed in the former paper. H.L.J. Bäckström has criticized Mitchell's paper, raising some objections 'against the experimental evidence produced aud the … way of interpreting it'. Where Bäckström objections touch on anything in Mitchell's paper which is incidentally akin to any of the work described in this or the earlier paper, they will be discussed herein.

On the perceptual origin of loanword adaptations: experimental evidence from Japanese

Phonology ◽  
2008 ◽  
Vol 25 (1) ◽  
pp. 129-164 ◽  
Author(s):  
Sharon Peperkamp ◽  
Inga Vendelin ◽  
Kimihiro Nakamura
Keyword(s):  
Experimental Evidence ◽  
Native Speakers ◽  
English Word ◽  
French Word ◽  
Nasal Consonant ◽  
Epenthetic Vowel ◽  
The Way

Japanese shows an asymmetry in the treatment of word-final [n] in loanwords from English and French: while it is adapted as a moraic nasal consonant in loanwords from English, it is adapted with a following epenthetic vowel in loanwords from French. We provide experimental evidence that this asymmetry is due to phonetic differences in the realisation of word-final [n] in English and French, and, consequently, to the way in which English and French word-final [n] are perceived by native speakers of Japanese. Specifically, French but not English word-final [n] has a strong vocalic release that Japanese listeners perceive as their native vowel [ɯ]. We propose a psycholinguistic model in which most loanword adaptations originate in perceptual assimilation, a process which takes place during perception and which maps non-native sounds and sound structures onto the phonetically closest native ones. We compare our model to alternatives couched within phonological theory.

Mechanisms of calcium disposal from osteoclastic resorption hemivacuole

2003 ◽  
Vol 176 (1) ◽  
pp. 1-5 ◽  
Author(s):  
HK Datta ◽  
BR Horrocks
Keyword(s):  
Protein Degradation ◽  
Experimental Evidence ◽  
Matrix Protein ◽  
Degradation Products ◽  
Transcellular Transport ◽  
Osteoclastic Resorption ◽  
Osteoclast Function ◽  
Theoretical Considerations ◽  
Simple Link

One of the most remarkable but neglected aspects of osteoclast function is its unique adaptation that allows the cell to function despite its resorbing surface being exposed to extremely high levels of ambient Ca2+. Recently our studies have provided evidence of continuous transcellular Ca2+ disposal, suggesting that osteoclasts are able to prevent Ca2+ accumulation within the resorptive hemivacuole. It has also been shown that matrix protein degradation products that accumulate within the osteoclast resorptive vacuole are also undergoing transcellular transport by transcytosis. However, both experimental evidence and theoretical considerations suggest that transcellular transport of Ca2+ and matrix protein is likely to occur via distinct routes. In light of these considerations, we are able to provide convincing explanations for the apparent anomalies of osteoclast intracellular [Ca2+] responses to a variety of endocrine stimuli. The understanding of the mechanisms involved in Ca2+ handling by osteoclasts indicates the lack of a simple link between osteoclast function and changes in overall cytosolic [Ca2+].

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