Zeeman's Catastrophe Machine

1973 ◽  
Vol 74 (2) ◽  
pp. 217-226 ◽  
Author(s):  
T. Poston ◽  
A. E. R. Woodcock
Keyword(s):  
Correct Answer ◽  
Physical Significance ◽  
Discontinuous Change ◽  
Change Of State ◽  
Smooth Change ◽  
The Family ◽  
René Thom ◽  
Almost All ◽  
Correct Data ◽  
Structurally Stable

René Thom(5) has shown that if the state of a system is determined by the local minimization of a potential – that is, if the system is so highly dissipative that transients can safely be ignored–then, though a smooth change in the potential function may give rise to a discontinuous change of state, the ways in which this can happen are quite limited. Infact, if we have at most a four-parameter family of potentials, discontinuities of this kind can occur in only seven ways up to local diffeotype, if they are to be structurally stable. (This latter condition is the requirement that it be im-possible to alter the discontinuity type by an arbitrarily small perturbation of the family of potentials: roughly it requires that the behaviour of the system, considered as a function of possible families ofpotentials, be ‘continuous’ at the family concerned. It bears the same relationship as does continuity to computability: a computer given approximately correct data for which to compute the value of a function or the behaviour of a system will give an approximately correct answer if the function is continuous, the system structurally stable. If not, only analytic methods will serve, and the physical significance of the result will be dubious. Fortunately, in the dimensions with which we are concerned, structural stability is an open dense property in the space of possible families of potentials; thus unstable systems can be ignored for almost all purposes, just as we ignore the ‘possibility’ of balancing a pin on its point.)

Analisis Perbandingan Manajemen Keuangan Ojek Online Dan Ojek Reguler Studi Kasus Kecamatan Duren Sawit Jakarta Timur

Liquidity ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 41-52
Author(s):  
M. Koesmawan ◽  
Darwin Erhandy ◽  
Dede Dahlan
Keyword(s):  
Financial Management ◽  
Average Income ◽  
Savings And Loans ◽  
Financial Difficulties ◽  
The Family ◽  
Family Finances ◽  
The Subject ◽  
Almost All

In order to meet the needs of living which consists of primary as well as secondary needs, human can work in either a formal or an informal job. One of the informal jobs that is became the subject of this research was to become an ojek driver. Ojek is a ranting motorcycle.  Revenue of ojek drivers, accordingly, should be well managed following the concept of financial management. This research was conducted for the driver of the online motorcycle drivers as well as the regular motorcycle drivers they are called “The Ojek”. Ojek’s location is in Kecamatan (subdistrict) Duren Sawit, East Jakarta with 70 drivers of ojeks. The online ojeks earn an average of Rp 100,000 per day, can save Rp 11,000 to 21,000 per day, while, the regular ojek has an average income per day slightly lower amounted to Rp 78,500, this kind of ojeks generally have other businesses and always record the outflow of theirs money. Both the online and regular ojeks feel a tight competition in getting passengers, but their income can help the family finances and both ojeks want a cooperative especially savings and loans, especially to overcome the urgent financial difficulties. Almost all rivers, do not dare to borrow money. They are afraid of can not refund the money as scheduled.

Two new species of the genus Syngastes (Copepoda, Harpacticoida, Tegastidae) from South Korea

Crustaceana ◽  
2016 ◽  
Vol 89 (4) ◽  
pp. 431-458 ◽  
Author(s):  
Jong Guk Kim ◽  
Jong Guk Kim ◽  
Tae Won Jung ◽  
Jong Guk Kim ◽  
Tae Won Jung ◽  
...  
Keyword(s):  
New Species ◽  
South Korea ◽  
First Record ◽  
Exopodal Segment ◽  
Key To Species ◽  
Korean Waters ◽  
The Family ◽  
Two New Species ◽  
Almost All

Herein two new species of the genusSyngastesMonard, 1924 are described from South Korea, with detailed descriptions and illustrations. Both new copepods,Syngastesmulticavussp. nov. andS. pseudofoveatussp. nov., have two inner setae on the first exopodal segment of P2 and P3.Syngastesmulticavussp. nov. most closely resemblesS. gibbosusBartsch, 1999 reported from Australia, as they both have a five-segmented antennule in the female. However,Syngastesmulticavussp. nov. has a rounded body outline instead of the gibbose outline observed inS. gibbosus.Syngastespseudofoveatussp. nov. resemblesS. foveatusBartsch, 1994 in almost all aspects. However, they differ clearly in the number of setae on the first exopodal segment of P2 and P3. We also provide a key to species of the genusSyngastesworldwide. The present study is the first record of the family Tegastidae in Korean waters.

Resolving the Lourinia armata (Claus, 1866) complex with remarks on the monophyletic status of Louriniidae, Monard 1927 (Copepoda: Harpacticoida)

Zootaxa ◽  
2021 ◽  
Vol 5051 (1) ◽  
pp. 346-386
Author(s):  
SÜPHAN KARAYTUĞ ◽  
SERDAR SAK ◽  
ALP ALPER ◽  
SERDAR SÖNMEZ
Keyword(s):  
Comparative Evaluation ◽  
Species Complex ◽  
Detailed Examination ◽  
The Other ◽  
Phylogenetic Position ◽  
Nicobar Island ◽  
Other Hand ◽  
The Family ◽  
Close Relationship ◽  
Almost All

An attempt was made to test if Lourinia armata (Claus, 1866)—as it is currently diagnosed—represents a species complex. Detailed examination and comparisons of several specimens collected from different localities suggest that L. armata indeed represents a complex of four closely related morphospecies that can be differentiated from one another by only detailed observations. One of the four species is identified as Lourinia aff. armata and the other three species are described as new to science and named as Lourinia wellsi sp. nov., L. gocmeni sp. nov., and L. aldabraensis sp. nov. Detailed review of previous species records indicates that the genus Lourinia Wilson, 1924 is distributed worldwide. Ceyloniella nicobarica Sewell, 1940, originally described from Nicobar Island and previously considered a junior subjective synonym of L. armata is reinstated as Lourinia nicobarica (Sewell, 1940) comb. nov. on the basis of the unique paddle-shaped caudal ramus seta V. It is postulated that almost all of these records are unreliable in terms of representing true Lourinia aff. armata described herein. On the other hand, the comparative evaluation of the illustrations and descriptions in the published literature indicates the presence of several new species waiting to be discovered in the genus Lourinia.                 It has been determined that, according to updated modern keys, the recent inclusion of the monotypic genus Archeolourinia Corgosinho & Schizas, 2013 in the Louriniidae is not justified since Archeolourinia shermani Corgosinho & Schizas, 2013 does not belong to this family but should be assigned to the Canthocamptidae. On the other hand, it has been argued that the exact phylogenetic position of the Louriniidae still remains problematic since none of the diagnostic characters supports the monophyly of the family within the Oligoarthra. It has also been argued that the close relationship between Louriniidae and Canthocamptidae is supported since both families share the homologous sexual dimorphism (apophysis) on P3 endopod. The most important characteristic that can possibly be used to define Louriniidae is the reduction of maxilliped.  

THE PATIENT BOY—A POPULAR LESSON, READ TO CHILDREN IN THE 1820'S

PEDIATRICS ◽  
1969 ◽  
Vol 43 (4) ◽  
pp. 526-526
Author(s):  
T. E. C.
Keyword(s):  
The Family ◽  
Almost All

The story below depicts a favorite subject of those who wrote for children in the early days of our country. The inebriated father leading his family inexorably into destitution by his intemperance is counterbalanced by a son who holds the family together. During the last century many children cried over this and similar stories. The Patient Boy There was a journeyman bricklayer in this town, a good workman, but a very drunken idle fellow; he spent at the dram shop almost all he earned, and left his wife and children to take care of themselves; to get food and clothes as they could. They might all have starved, but for the eldest son, whom his father had brought up to help him at his work; and who was so industrious and attentive, that being now at the age of thirteen or fourteen, he was able to earn pretty good wages, every penny of which that he could keep out of his father's hands, he brought to his mother. When the brute of a father came home drunk, cursing and swearing, and in such an ill humour that his mother, and the rest of the children, durst not come near him for fear of a beating, this good lad (Tom was his name) kept close to him, to pacify him, and get him quietly to bed. His mother looked upon Tom as the support of the family, and loved him dearly. It happened one day, Tom in climbing up a high ladder, with a load of mortar on his head, missed his hold, and fell down to the bottom, on a heap of bricks and rubbish.

scholarly journals Volcanic impact on the climate – the stratospheric aerosol load in the period 2006–2015

2018 ◽  
Vol 18 (15) ◽  
pp. 11149-11169 ◽  
Author(s):  
Johan Friberg ◽  
Bengt G. Martinsson ◽  
Sandra M. Andersson ◽  
Oscar S. Sandvik
Keyword(s):  
Radiative Forcing ◽  
Volcanic Eruptions ◽  
Stratospheric Aerosol ◽  
Temperature Threshold ◽  
Data Set ◽  
Volcanic Impact ◽  
Almost All ◽  
Stratospheric Clouds ◽  
Correct Data

Abstract. We present a study on the stratospheric aerosol load during 2006–2015, discuss the influence from volcanism and other sources, and reconstruct an aerosol optical depth (AOD) data set in a resolution of 1∘ latitudinally and 8 days timewise. The purpose is to include the “entire” stratosphere, from the tropopause to the almost particle-free altitudes of the midstratosphere. A dynamic tropopause of 1.5 PVU was used, since it enclosed almost all of the volcanic signals in the CALIOP data set. The data were successfully cleaned from polar stratospheric clouds using a temperature threshold of 195 K. Furthermore, a method was developed to correct data when the CALIOP laser beam was strongly attenuated by volcanic aerosol, preventing a negative bias in the AOD data set. Tropospheric influence, likely from upwelling dust, was found in the extratropical transition layer in spring. Eruptions of both extratropical and tropical volcanoes that injected aerosol into the stratosphere impacted the stratospheric aerosol load for up to a year if their clouds reached lower than 20 km altitude. Deeper-reaching tropical injections rose in the tropical pipe and impacted it for several years. Our AODs mostly compare well to other long-term studies of the stratospheric AOD. Over the years 2006–2015, volcanic eruptions increased the stratospheric AOD on average by ∼40 %. In absolute numbers the stratospheric AOD and radiative forcing amounted to 0.008 and −0.2 W m−2, respectively.

Vincent Noce, La Collection Egoiste (The Selfish Collector)

2006 ◽  
Vol 13 (1) ◽  
pp. 115-119
Author(s):  
Lyndel V. Prott
Keyword(s):  
New York ◽  
New York Times ◽  
Illicit Trade ◽  
The Family ◽  
Almost All

Vincent Noce, La Collection Egoiste (The Selfish Collector) pp. 328. J. C. Lattès, Paris, 2005. ISBN 2-7096-241-9.Few people who follow cases relating to the illicit trade can have missed the celebrated case of Stéfane Breitwieser, the Alsatian misfit who stole, over a period of 8 or so years, hundreds of objects from museums and churches to squirrel away in his attic rooms, or that of his mother Mireille Stengel, who destroyed almost all of it by disposal in the family garbage bin or by throwing it into a canal. This book, however, shows just how much a dedicated investigative journalist can add to the record, details that are not only useful in trying to understand the mentality of Breitwieser (by no means an isolated case as this account shows) and even more useful in showing the loopholes in the investigations, the lack of coordination between countries, and the sheer ineptitude of many institutions in securing their collections. Noce, editor of the cultural section of the French newspaper Libération, has joined the select company of Karl Meyer (articles in the New York Times) and Peter Watson who have added greatly to our knowledge of how the illicit trade works. French journalists, too, are greatly helping expose the unsavory details of these activities (see Noce's previous book Descente aux Enchères and that of Emmanuel de Roux and Roland-Pierre Paringaud, Razzia sur L'art).

scholarly journals Malignant diseases as suicidal motives

2007 ◽  
Vol 135 (11-12) ◽  
pp. 659-665 ◽  
Author(s):  
Ljiljana Bogdanovic ◽  
Slobodan Savic ◽  
Gordana Basta-Jovanovic
Keyword(s):  
Malignant Disease ◽  
Health Workers ◽  
Mutual Influence ◽  
Malignant Neoplasms ◽  
Malignant Diseases ◽  
School Of Medicine ◽  
The Family ◽  
Medical Documents ◽  
Basic Characteristics ◽  
Almost All

Introduction Suicide is a conscious and intentional destruction of one?s own life, which occurs as a result of mutual influence of a person?s disposition and motives (facts inspiring the commitment of suicide). It is well known that various diseases, including malignancies, could be important and in some cases the only motive for committing suicide. Objective The purpose of the study was to analyze in detail suicides of persons whose only motive was an established malignant disease. Method The analysis was performed using the autopsy material of the Institute of Forensic Medicine, School of Medicine, University of Belgrade, during the period from 1990 to 2004. The reports on performed medico-legal autopsies were used, as well as history data obtained from the family members of suicidal persons, investigation reports and the available medical documents. Results In 1931 cases there was established suicidal nature of a violent death. Neoplasms were the suicidal motive in 37 persons (1.9%). The basic characteristics of the analyzed sample were predominance of males (26:11, ratio 2.4:1), the age of over 70 years and the highest incidence of malignant lung and breast tumors. Almost all cases were the persons who underwent treatment for malignant neoplasms over a longer period of time. During 19 autopsies (51.3% out of 37), a progressive phase of malignancy was established, i.e. metastases. The data on prior oral announcement of suicide intention were obtained for 70.3% (26 cases), and on previous suicidal attempts only for 13.5% (5) cases. In the majority of cases (78.4%) the place of committed suicide was the person?s home. In 16 cases (43.2%) the suicide was committed with a firearm. Hanging as a manner of destroying one?s own life was chosen by 12 persons (32.4%), while other ways were less frequently used. Conclusion Although malignancies were not present with high incidence as a suicidal motive in our analyzed sample, such cases require particular care of health workers in order to enable the application of adequate measures in the prevention of suicides in persons with malignant diseases. The suicide analyses performed so far indicated that a malignant disease was the motive. Doctors have to show maximal interest for the patient. Prevention is crucial, so the patient should be provided with such surroundings in which the person will not feel alone and abandoned.

Terrestrial Environments

2020 ◽  
pp. 359-388
Author(s):  
Spyros Sfenthourakis ◽  
Alan A. Myers ◽  
Stefano Taiti ◽  
James K. Lowry
Keyword(s):  
Morphological Characters ◽  
Tectonic Activity ◽  
Model Organisms ◽  
Aquatic Life ◽  
Terrestrial Isopods ◽  
Biological Studies ◽  
The Family ◽  
Terrestrial Environments ◽  
Forest Leaf Litter ◽  
Almost All

Among crustaceans, only Amphipoda, Isopoda, and Decapoda have invaded truly terrestrial environments, but only two groups show full adaptations to live on land: the family Talitridae among the Amphipoda and the suborder Oniscidea among the Isopoda. The Talitridae occur primarily in forest leaf litter, but a number of other habitats, including caves, are recorded. Talitrids are important ecological contributors to the litter fauna, often occurring in high densities. Their adaptations to a terrestrial way of life include the retention of the mitten-shaped second gnathopods, a neotenic condition among males; the first article of antenna 2 greatly enlarged and fixed to the side of the head; and enlarged gills and pleopods often reduced, sometimes to vestigial stumps. Talitrids have a skewed world distribution being at their most diverse in New Zealand, Tasmania, and Japan/Taiwan. They occur in the Caribbean and Central America but are absent from South and North America except as introduced taxa. Their distribution is largely a result of tectonic activity during the past 150 million years and of extinctions during the Tertiary due to increasing aridity of the climate. The Oniscidea (terrestrial isopods) are the only crustaceans that have managed to adapt to almost all habitat types on land and have become the most species-rich suborder of Isopoda. Although monophyly of the Oniscidea is generally accepted, current taxonomy, based almost entirely on morphological characters, needs extensive revision. Terrestrial isopods present a number of unique adaptations to life on land, some of which result from what can be considered as pre-adaptations of ancestral marine isopods, such as egg development in a marsupium, being dorso-ventrally oblate and having a pleopodal respiration. Other crucial adaptations of Oniscidea include the water-conducting system, the structure of their cuticle, and the “covered” type of pleopodal lungs, all of which are responses to the acute problem of desiccation. They are also among the most speciose taxa in caves, some species have even returned to an aquatic life, and a few species have evolved social behavior. Oniscidea are increasingly being used in biogeographical, phylogeographical, ecological, and evolutionary research and can become model organisms for a broad range of biological studies.

scholarly journals A rare case of an evolutionary late and ephemeral biomineralization: tunicates with composite calcareous skeletons

2020 ◽  
Vol 94 (4) ◽  
pp. 748-757
Author(s):  
Jobst Wendt
Keyword(s):  
New Species ◽  
New Genus ◽  
Lower Jurassic ◽  
Late Triassic ◽  
Cambrian Explosion ◽  
New Order ◽  
Colonial Ascidian ◽  
New Family ◽  
The Family ◽  
Almost All

AbstractIn contrast to almost all other invertebrate phyla that constructed biomineralized skeletons during the “Cambrian explosion” and maintained them during the entire fossil record, ascidian tunicates evolved this protective and stabilizing advantage only during the Permian, although soft-bodied representatives of this subphylum made their first appearance already in the early Cambrian. It remains enigmatic why these compound calcareous skeletons persisted only until the Late Triassic, subsequently followed by less-rigid internal skeletons from the Lower Jurassic onwards, which consist of scattered isolated spicules only. In addition to recently described aragonitic ascidian exoskeletons from the Permian and Triassic, new discoveries of similar, but colonial ascidian compound endoskeletons in the lower Carnian exhibit a short-living branch of this group, which moreover contain the first indubitable calcareous spicules. The latter are embedded in the solid endoskeleton, which is composed of polygonal aragonitic plates with smooth outer and zigzag lined inner boundaries. They consist of irregular, parallel (orthogonal), or fan-shaped (clinogonal) arrangements of acicular aragonite crystals. The following taxa are described as new: order Cassianomorpha new order with the family Cassianosomidae new family and the genus Toscanisoma new genus with the species T. multipartitum new species and T. triplicatum new species.UUID: http://zoobank.org/03555353-cdab-42e8-8e99-9bfce15fa249

Associations in the Greco-Roman World

2013 ◽  
Author(s):  
John S. Kloppenborg
Keyword(s):  
Active Role ◽  
Greco Roman ◽  
Diasporic Identity ◽  
The Family ◽  
Distinctive Structure ◽  
The Common ◽  
Almost All ◽  
Private Associations ◽  
The Town ◽  
Organization Membership

Life in the cities and towns of the Hellenistic and Roman periods was organized around two poles: the polis or town, and the family, each with its distinctive structure, organization, membership, and cultic practices. Between these two poles there existed a large number of more or less permanent private associations, guilds, and clubs. Some were extensions or expansions of the family; others were organized around a common cult or diasporic identity; others were formed around a common occupation (silverworkers, rag dealers, woodsmen, etc.), and still others were neighborhood associations consisting of the trades that congregated in a particular area of the town. Almost all associations engaged in cultic activities; most held monthly (or more frequent) banquets and meetings; many took an active role in the funerals of members; and many had formal rules governing admission, dues, and the behavior of members. Early Christ-groups were certainly regarded by external observers as varieties of associations, and Judean synagogai (one of the common terms for associations) are easily seen as one form of diasporic association, formed around a common ethnic identity and a common cult. The study of ancient associations is important for understanding the structure, organization, and functions of early Christ-groups and Judean synagogues.

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