scholarly journals THE VISUAL SYSTEMS OF EURYHALINE FISHES

1941 ◽  
Vol 25 (2) ◽  
pp. 235-245 ◽  
Author(s):  
George Wald
Keyword(s):  
Visual System ◽  
Fresh Water ◽  
Brook Trout ◽  
White Perch ◽  
Terrestrial Vertebrates ◽  
Visual Systems ◽  
Formal Requirement ◽  
Wide Range ◽  
History Of ◽  
The Individual

1. The retinas of all marine fishes so far examined except the Labridae, and of all terrestrial vertebrates contain the rhodopsin system alone; those of fresh water fishes the porphyropsin system alone. In the present paper the visual systems of a number of euryhaline fishes are examined—fishes capable of existence in a wide range of salinities, though usually restricted in spawning either to the sea (catadromous) or to fresh water (anadromous). 2. The retinas of the anadromous salmonids (brook trout, rainbow trout, and chinook salmon) contain mixtures of the rhodopsin and porphyropsin systems, predominantly the latter. The retinas of the catadromous eel and the killifish also contain mixtures of both systems, but in reverse proportions. The retinas of the anadromous white perch and alewife contain the porphyropsin system alone. 3. There is therefore an extensive parallelism between the salinity relations of these animals and the composition of their visual systems. All of them possess predominantly or exclusively the visual system commonly associated with the environment in which the fish spawns. 4. These patterns are fixed genetically, and are to a first approximation independent of the history of the individual. They may represent transitional stages in the evolutionary migration of fishes to and from the sea. The presence of both types of visual system in the retinas of some euryhaline fishes incidentally satisfies one formal requirement of two-component color vision.

ExpanDrogram: Dynamic Visualization of Big Data Segmentation over Time

2021 ◽  
Vol 13 (2) ◽  
pp. 1-27
Author(s):  
A. Khalemsky ◽  
R. Gelbard
Keyword(s):  
Big Data ◽  
Visual Presentation ◽  
Trend Detection ◽  
Dynamic Visualization ◽  
Segmentation Process ◽  
Key Points ◽  
Wide Range ◽  
History Of ◽  
The Individual ◽  
Over Time

In dynamic and big data environments the visualization of a segmentation process over time often does not enable the user to simultaneously track entire pieces. The key points are sometimes incomparable, and the user is limited to a static visual presentation of a certain point. The proposed visualization concept, called ExpanDrogram, is designed to support dynamic classifiers that run in a big data environment subject to changes in data characteristics. It offers a wide range of features that seek to maximize the customization of a segmentation problem. The main goal of the ExpanDrogram visualization is to improve comprehensiveness by combining both the individual and segment levels, illustrating the dynamics of the segmentation process over time, providing “version control” that enables the user to observe the history of changes, and more. The method is illustrated using different datasets, with which we demonstrate multiple segmentation parameters, as well as multiple display layers, to highlight points such as new trend detection, outlier detection, tracking changes in original segments, and zoom in/out for more/less detail. The datasets vary in size from a small one to one of more than 12 million records.

Origins

2020 ◽  
pp. 11-30
Author(s):  
Phillip Brown
Keyword(s):  
Human Capital ◽  
Adam Smith ◽  
Wealth Creation ◽  
Capital Theory ◽  
Ibn Khaldun ◽  
Wide Range ◽  
Human Labor ◽  
History Of ◽  
The Individual

This chapter discusses the history of human capital theory. Before the mid-twentieth century the idea of human capital had a checkered history. Ideas linking the role of human labor to wealth creation can be traced to the works of Aristotle, Ibn Khaldun, and Thomas Aquinas. The chapter examines the ideas posed by notable economic theorists and thinkers such as Adam Smith, Alfred Marshall, Theodore Schultz, and Gary Becker. It shows how the ideas developed by these thinkers extended to a wide range of issues concerning the relationship between education and the labor market. In turn, they were able to influence policy in such powerful ways that their legacy remains. Above all, their influence shaped the way education is viewed in many countries: as an investment in the economic fortunes of the individual and the nation. This view gradually emerged as the dominant one, but was triumphantly sealed by the advent of neoliberalism in the 1980s.

PROBING FOR STRONTIUM PATTERNS IN OTOLITHS OF COMMON BULLIES FROM THE CLUTHA RIVER, NEW ZEALAND

2002 ◽  
Vol 12 (03n04) ◽  
pp. 109-115 ◽  
Author(s):  
A. MARKWITZ ◽  
B. BARRY ◽  
G. CLOSS ◽  
M. SMITH
Keyword(s):  
Life History ◽  
Life Cycle ◽  
New Zealand ◽  
Freshwater Fish ◽  
Fresh Water ◽  
Juvenile Phase ◽  
History Of ◽  
The Individual ◽  
Fish Otoliths ◽  
Gobiomorphus Cotidianus

Common bullies, Gobiomorphus cotidianus, are a widespread small New Zealand freshwater fish, with a life-cycle that may include an optional juvenile marine phase. We used the strontium variation in fish otoliths in an attempt to track the life history of the individual fish since the interlayer variation reflect the exposure of fish to background environmental levels of Sr at the time of deposition. One possible mechanism by which Sr can be enriched in otoliths is by seawater, which usually has a higher Sr/Ca ratio than fresh water. Locally resolved elemental measurements with a proton microprobe enable therefore the detection of variation in Sr that may reflect single or multiple migrations of freshwater fish into seawater. The most striking feature of this study is the observation of high Sr/Ca ratios in the cores of all otoliths, including those from fish caught 50 km inland. This suggests different environments in the life cycle of common bullies in the lower reaches of the Clutha river. A marine juvenile phase may be a common feature. Preliminary area scans were used to select suitable transects for detailed line scans which gave greatly improved statistics.

Life History of Sea-Running Brook Trout (Salvelinus fontinalis) of Moser River, N.S.

1940 ◽  
Vol 5a (2) ◽  
pp. 176-186 ◽  
Author(s):  
H. C. White
Keyword(s):  
Life History ◽  
Fresh Water ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Large Fish ◽  
History Of

Smolts, kelts and non-mature large fish descend in May and early June to the sea, to remain feeding in the estuary or near the shore. They began (1939) to ascend the river in late June, and 93% of the "run" was in July.Fish marked when descending one branch of the river ascended both that branch and the river above but the proportion of marked fish was greater in the branch.These trout agree with the local salmon in having smolts that become silvery before migration and that are two or three years old. Trout smolts and kelts remain in the sea only about two months before returning to fresh water.

scholarly journals Artistic Genius versus the Hanse Canon from the Late Middle Ages to the Early Modern Age in Tallinn

2020 ◽  
Vol 20 ◽  
pp. 59-80
Author(s):  
Juhan Maiste
Keyword(s):  
Middle Ages ◽  
The Other ◽  
15Th Century ◽  
Late Middle Ages ◽  
Wide Range ◽  
Working Together ◽  
History Of ◽  
The Veil ◽  
The One ◽  
The Individual

In the article, the author examines one of the most outstanding andproblematic periods in the art history of Tallinn as a Hanseatic city,which originated, on the one hand, in the Hanseatic tradition andthe medieval approach to Gothic transcendental realism, and onthe other, in the approach typical of the new art cities of Flanders,i.e. to see a reflection of the new illusory reality in the pictures. Acloser examination is made of two works of art imported to Tallinnin the late 15th century, i.e. the high altar in the Church of the HolySpirit by Bernt Notke and the altarpiece of Holy Mary, whichwas originally commissioned by the Brotherhood of Blackheadsfor the Dominican Monastery and is now in St Nicholas’ Church.Despite the differences in the iconography and style of the twoworks, their links to tradition and artistic geography, which in thisarticle are conditionally defined as the Hanse canon, are apparentin both of them.The methods and rules for classifying the transition from theMiddle Ages to the Modern Era were not critical nor exclusive.Rather they included a wide range of phenomena on the outskirtsof the major art centres starting from the clients and ending with the semantic significance of the picture, and the attributes that wereemployed to the individual experiences of the different masters,who were working together in the large workshops of Lübeck, andsomewhat later, in Bruges and Brussels.When ‘reading’ the Blackheads’ altar, a question arises of threedifferent styles, all of them were united by tradition and the waythat altars were produced in the large workshops for the extensiveart market that stretched from one end of the continent to the other,and even further from Lima to Narva. Under the supervision ofthe leading master and entrepreneur (Hans Memling?) two othermasters were working side by side in Bruges – Michel Sittow, whowas born in Tallinn, and the Master of the Legend of Saint Lucywere responsible for executing the task.In this article, the author has highlighted new points of reference,which on the one hand explain the complex issues of attributionof the Tallinn Blackheads’ altar, and on the other hand, placethe greatest opus in the Baltics in a broader context, where, inaddition to aesthetic ambitions, both the client and the workshopthat completed the order, played an extensive role. In this way,identifying a specific artist from among the others would usuallyremain a matter of discussion. Tallinn was a port and a wealthycommercial city at the foregates of the East where it took decadesfor the spirit of the Renaissance to penetrate and be assimilated.Instead of an unobstructed view we are offered uncertain andoften mixed values based on what we perceive through the veil ofsemantic research.

scholarly journals University Settlements in Great Britain

1911 ◽  
Vol 4 (2) ◽  
pp. 175-203 ◽  
Author(s):  
Percy Ashley
Keyword(s):  
Great Britain ◽  
British Empire ◽  
Social Life ◽  
The Past ◽  
Main Emphasis ◽  
Wide Range ◽  
Settlement Movement ◽  
History Of ◽  
The Individual ◽  
The University

A quarter of a century has now elapsed since the foundation of Toynbee Hall in the east of London inaugurated the “University Settlement” movement in the vast and then almost inchoate capital of the British Empire; and the present time seems therefore appropriate for an attempt to form some estimate of the past results and future possibilities of the movement, which soon spread to other towns of England and Scotland. Yet such an undertaking is beset with serious difficulties. Throughout the whole history of the settlements there is indeed apparent an essential identity of purpose, an underlying uniformity of motive; but the individual institutions have been the outcome of the action of various bodies of persons whose aims, as formally expressed, seem often very diverse; different groups have laid the main emphasis on different objects and methods, and what has been counted as triumphant success by one group has been deemed of relatively small importance by another. Further, the wide range of the activities of the settlements, the multifarious nature of their interests and work, render it practically impossible for any one observer to comprehend the whole in his single survey; and the selection which he must needs make tends almost inevitably to be determined, and it may be even unfairly biassed, by his own personal predilections. Within this narrower range, moreover, there is no certain standard by which to measure success or failure; the value of the work accomplished by a settlement is not to be judged solely, or even chiefly, by the statistics of its classes and clubs. If it has realized its objects, however imperfectly, it has exercised upon the surrounding community, in conjunction with all other institutions that in any way and by any means make for good, a subtle and permeating influence which has resulted in a progressive amelioration of social life; but, for the very reason that this achievement is the result of a number of co-operating forces, the share of the settlement therein cannot be isolated or defined with any exactitude.

scholarly journals Gaia-2MASS 3D maps of Galactic interstellar dust within 3 kpc

2019 ◽  
Vol 625 ◽  
pp. A135 ◽  
Author(s):  
R. Lallement ◽  
C. Babusiaux ◽  
J. L. Vergely ◽  
D. Katz ◽  
F. Arenou ◽  
...  
Keyword(s):  
Interstellar Dust ◽  
Outer Part ◽  
Solar Neighborhood ◽  
Inversion Algorithm ◽  
Wide Range ◽  
Subsequent Step ◽  
History Of ◽  
The Individual ◽  
Perseus Arm ◽  
Do So

Gaia stellar measurements are currently revolutionizing our knowledge of the evolutionary history of the Milky Way. 3D maps of the interstellar dust provide complementary information and are a tool for a wide range of uses. We built 3D maps of the dust in the Local arm and surrounding regions. To do so, Gaia DR2 photometric data were combined with 2MASS measurements to derive extinction toward stars that possess accurate photometry and relative uncertainties on DR2 parallaxes smaller than 20%. We applied a new hierarchical inversion algorithm to the individual extinctions that is adapted to large datasets and to an inhomogeneous target distribution. Each step associates regularized Bayesian inversions in all radial directions and a subsequent inversion in 3D of all their results. Each inverted distribution serves as a prior for the subsequent step, and the spatial resolution is progressively increased. We present the resulting 3D distribution of the dust in a 6 × 6 × 0.8 kpc3 volume around the Sun. Its main features are found to be elongated along different directions that vary from below to above the mid-plane. The outer part of Carina-Sagittarius, mainly located above the mid-plane, the Local arm/Cygnus Rift around and above the mid-plane, and the fragmented Perseus arm are oriented close to the direction of circular motion. The spur of more than 2 kpc length (nicknamed the split) that extends between the Local Arm and Carina-Sagittarius, the compact near side of Carina-Sagittarius, and the Cygnus Rift below the Plane are oriented along l ~40 to 55°. Dust density images in vertical planes reveal a wavy pattern in some regions and show that the solar neighborhood within ~500 pc remains atypical by its extent above and below the Plane. We show several comparisons with the locations of molecular clouds, HII regions, O stars, and masers. The link between the dust concentration and these tracers is markedly different from one region to the other.

Group Experiences and Individual Differences in Stuttering

2019 ◽  
Vol 62 (12) ◽  
pp. 4335-4350 ◽  
Author(s):  
Seth E. Tichenor ◽  
J. Scott Yaruss
Keyword(s):  
Individual Differences ◽  
Support Groups ◽  
Support Group ◽  
Affective States ◽  
Life Outcomes ◽  
Self Help ◽  
Wide Range ◽  
Group Experiences ◽  
History Of ◽  
Adults Who Stutter

Purpose This study explored group experiences and individual differences in the behaviors, thoughts, and feelings perceived by adults who stutter. Respondents' goals when speaking and prior participation in self-help/support groups were used to predict individual differences in reported behaviors, thoughts, and feelings. Method In this study, 502 adults who stutter completed a survey examining their behaviors, thoughts, and feelings in and around moments of stuttering. Data were analyzed to determine distributions of group and individual experiences. Results Speakers reported experiencing a wide range of both overt behaviors (e.g., repetitions) and covert behaviors (e.g., remaining silent, choosing not to speak). Having the goal of not stuttering when speaking was significantly associated with more covert behaviors and more negative cognitive and affective states, whereas a history of self-help/support group participation was significantly associated with a decreased probability of these behaviors and states. Conclusion Data from this survey suggest that participating in self-help/support groups and having a goal of communicating freely (as opposed to trying not to stutter) are associated with less negative life outcomes due to stuttering. Results further indicate that the behaviors, thoughts, and experiences most commonly reported by speakers may not be those that are most readily observed by listeners.

Investigating the Relationship Between Self-Esteem and Stigma Among Young Adults With History of Suicide Attempts

Crisis ◽  
2016 ◽  
Vol 37 (4) ◽  
pp. 265-270 ◽  
Author(s):  
Meshan Lehmann ◽  
Matthew R. Hilimire ◽  
Lawrence H. Yang ◽  
Bruce G. Link ◽  
Jordan E. DeVylder
Keyword(s):  
Young Adults ◽  
Suicide Attempts ◽  
Self Esteem ◽  
High Risk Population ◽  
High Functioning ◽  
People With Mental Illness ◽  
History Of ◽  
The Individual ◽  
The Impact ◽  
The Relationship

Abstract. Background: Self-esteem is a major contributor to risk for repeated suicide attempts. Prior research has shown that awareness of stigma is associated with reduced self-esteem among people with mental illness. No prior studies have examined the association between self-esteem and stereotype awareness among individuals with past suicide attempts. Aims: To understand the relationship between stereotype awareness and self-esteem among young adults who have and have not attempted suicide. Method: Computerized surveys were administered to college students (N = 637). Linear regression analyses were used to test associations between self-esteem and stereotype awareness, attempt history, and their interaction. Results: There was a significant stereotype awareness by attempt interaction (β = –.74, p = .006) in the regression analysis. The interaction was explained by a stronger negative association between stereotype awareness and self-esteem among individuals with past suicide attempts (β = –.50, p = .013) compared with those without attempts (β = –.09, p = .037). Conclusion: Stigma is associated with lower self-esteem within this high-functioning sample of young adults with histories of suicide attempts. Alleviating the impact of stigma at the individual (clinical) or community (public health) levels may improve self-esteem among this high-risk population, which could potentially influence subsequent suicide risk.

Introduction: Emotion, History and the Arts

2018 ◽  
Vol 7 (2) ◽  
pp. 117-128 ◽  
Author(s):  
Erin Sullivan ◽  
Marie Louise Herzfeld-Schild
Keyword(s):  
Historical Change ◽  
Carson Mccullers ◽  
Emotional Life ◽  
Review Section ◽  
The Arts ◽  
Wide Range ◽  
War Correspondents ◽  
History Of ◽  
Johan Huizinga

This introduction surveys the rise of the history of emotions as a field and the role of the arts in such developments. Reflecting on the foundational role of the arts in the early emotion-oriented histories of Johan Huizinga and Jacob Burkhardt, as well as the concerns about methodological impressionism that have sometimes arisen in response to such studies, the introduction considers how intensive engagements with the arts can open up new insights into past emotions while still being historically and theoretically rigorous. Drawing on a wide range of emotionally charged art works from different times and places—including the novels of Carson McCullers and Harriet Beecher-Stowe, the private poetry of neo-Confucian Chinese civil servants, the photojournalism of twentieth-century war correspondents, and music from Igor Stravinsky to the Beatles—the introduction proposes five ways in which art in all its forms contributes to emotional life and consequently to emotional histories: first, by incubating deep emotional experiences that contribute to formations of identity; second, by acting as a place for the expression of private or deviant emotions; third, by functioning as a barometer of wider cultural and attitudinal change; fourth, by serving as an engine of momentous historical change; and fifth, by working as a tool for emotional connection across communities, both within specific time periods but also across them. The introduction finishes by outlining how the special issue's five articles and review section address each of these categories, while also illustrating new methodological possibilities for the field.

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