Investigating the Epistemic Nature of STEM: Analysis of Science Curriculum Documents from the USA Using the Family Resemblance Approach

2020 ◽  
pp. 137-155
Author(s):  
Wonyong Park ◽  
Jen-Yi Wu ◽  
Sibel Erduran
Keyword(s):  
Science Curriculum ◽  
Family Resemblance ◽  
Stem Analysis ◽  
The Family ◽  
The Usa

scholarly journals Economic dimensions and legal regulation of the recovery of alimony obligations for the support of minor children in Russia

2021 ◽  
Vol 8 (4) ◽  
pp. 640-652
Author(s):  
Yulia Artemyeva
Keyword(s):  
Regression Models ◽  
Well Being ◽  
Legal Regulation ◽  
Opportunity Costs ◽  
Economic Factors ◽  
The Family ◽  
The Usa ◽  
Minor Children ◽  
Integral Indicator

The research aims to substantiate economic factors and legal regulation of alimony obligations for minors’ maintenance in Russia, referring to other countries’ experiences and applying a questionnaire, indicators of the parents’ well-being, the satisfaction of the child’s needs, and parents’ participation in raising a child after a divorce was determined as can be seen in Russia, the USA, Germany, and France. Regression models are built reflecting the influence of the number of alimony payments, the indicator of parent’s participation in raising a child, the opportunity costs associated with the choice made by each spouse in favor of the family and children, on the integral indicator of the effectiveness of alimony obligations and its particular indicators. The results obtained have determined the guidelines for forming legal regulation of alimony obligations in Russia, which will increase the legislative efficiency of the recovery of alimony payments

Crayfish Aquaculture

2020 ◽  
pp. 260-284
Author(s):  
W. Ray McClain
Keyword(s):  
Life Histories ◽  
Procambarus Clarkii ◽  
Integrated System ◽  
Medium Size ◽  
South Central ◽  
Current State ◽  
The Family ◽  
The Usa ◽  
Freshwater Crustacean ◽  
Central Usa

Crayfish have been in demand as desirable food items around the globe for centuries, and entrepreneurs have capitalized on this demand by developing and applying aquaculture principals for the intentional culture of this freshwater crustacean. The current state of the art has advanced within the last half century and is centered on a handful of species, represented by three different families, with some level of commercial production occurring on all continents except Antarctica. Procambarus clarkii (family Cambaridae), a native of south central USA, is cultured in the USA and China and easily forms the bulk of farm-raised and wild-captured crayfish globally. One North American species (Pacifastacus leniusculus) and two European species (Astacus astacus and A. leptodactylus) constitute the main cultured species from the family Astacidae and are grown in small operations throughout Europe and parts of Asia. Four species (Parastacidae), all natives of Oceania, are cultured in their native ranges and were also introduced for aquaculture in several locations around the globe. Cherax destructor and C. albidus, both commonly referred to as yabby, are medium-size crayfish and share similar life histories, whereas C. quadricarinatus (redclaw crayfish) and C. cainii (smooth marron) are larger and more valuable but have very different geographical origins. While commercial crayfish aquaculture is typically based on an extensive or semi-extensive production approach in earthen ponds, more intensive approaches may involve selective breeding, improved strains, brood or nursery phases, and use of raceways or recirculation systems. Pond size can range from 0.05 to 80 ha, depending on the species cultured. Harvesting is accomplished mainly by baited trap, although other gear and techniques are sometimes employed. Global crayfish aquaculture production has expanded significantly in the last decade, due largely to the integration of Procambarus clarkii with that of rice production in the USA and China. This integrated system of production works well because rice farming has similar requirements as crayfish aquaculture, such as clay soils, irrigation systems, and suitable climates; furthermore, the rice crop residue provides the base of the food web for furnishing sustenance to growing crayfish.

The Triple-Point Planet

2016 ◽  
Author(s):  
Ben McFarland
Keyword(s):  
Middle English ◽  
Family Resemblance ◽  
The Moon ◽  
The Road ◽  
Naked Eye ◽  
Third Phase ◽  
The Family ◽  
The Us ◽  
Let's Move ◽  
The Difference

Let’s move to a vantage point a little quieter: the surface of the moon. It is so still that Neil Armstrong’s footprints remain undisturbed. The only reason the US flag there appears to “fly” is that a wire holds it up. The moon and Mercury stayed still as Mars, Venus, and Earth moved on down the road of geological development. The moon is a “steady” environment, a word whose Middle English roots are appropriately tangled with the word for “sterile.” Nothing moves on the moon, but in its sky Mars, Venus, and Earth move in their orbits, just as they moved on in complexity 4 billion years ago. Out of the whole solar system, Mars and Venus are the most like Earth in size, position, and composition. Mars is smaller, but Venus could be Earth’s twin in size. If Earth and Venus were separated at birth, then something happened to obscure the family resemblance: liquid water brought life. To chemists, liquid is the third phase of matter, between solid and gas, and its presence made all the difference. Mars gleams a bright blood red even to the naked eye, while Venus is choked with thick yellow bands of clouds. Mars is cold enough to have carbon dioxide snow, while Venus is hot enough to melt tin and boil water. Earth’s blue oceans and green continents provide a bright, primary contrast. These three siblings have drastically different fortunes. At first, they looked the same, colored with black mafic basalt and glowing red magma. The original planets were all so hot that their atmospheres were driven off into space. The oceans and the air came from within. Steam condensed into oceans on each planet’s cool basalt surface. Oceans changed the planet. Water is a transformative chemical, small yet highly charged, seeping into the smallest cracks, dissolving what it can and carrying those things long distances. Venus, Earth, and Mars do not look like the moon because they have been washed in water. Mars is dry now, but the Curiosity rover left no doubt that the red planet was first blue with water.

Literature analysis in relation to research on the five basic tastes

2019 ◽  
Vol 50 (1) ◽  
pp. 34-46 ◽  
Author(s):  
Andy Wai Kan Yeung ◽  
Thomas Hummel
Keyword(s):  
Design Methodology ◽  
Web Of Science ◽  
Similar Amount ◽  
Chemical Senses ◽  
H Index ◽  
Content Type ◽  
Umami Taste ◽  
Publication Number ◽  
The Family ◽  
The Usa

Purpose This study aims to investigate the literature concerning the five basic tastes and find out who contributed to these publications, where they were published and what concepts were investigated. Design/methodology/approach The Web of Science was searched to identify the relevant articles. For each paper, the full record and cited references were analyzed. Findings Sweetness received the most attention, with 6,445 publications, 144,648 citations and h-index of 137. It was followed by bitterness (5,606 publications and 125,525 citations), sourness (1,841 publications and 40,696 citations), umami (1,569 publications and 39,120 citations) and saltiness (1,547 publications and 33,627 citations). Though umami taste had similar publication number as salty and sour tastes, it had the highest number of average citations per publication (24.9). The USA, Japan, Germany and England were major contributors to research on every basic taste. Chemical Senses was the major outlet of taste papers. Terms from the titles suggested that multiple tastes were often co-investigated. Ikeda (1909) and Kodama (1913) were identified as the seminal references that laid the foundation of umami research. Originality/value Umami, although only added relatively late to the family of basic tastes, is a highly investigated principle that receives similar amount of attention as some other basic tastes, such as sourness and saltiness.

The Family Resemblance Hypothesis Applied to Psychiatric Classification

1989 ◽  
Vol 177 (8) ◽  
pp. 492-497 ◽  
Author(s):  
ROGER K. BLASHFIELD ◽  
JUNE SPROCK ◽  
DOUG HAYMAKER ◽  
JON HODGIN
Keyword(s):  
Family Resemblance ◽  
Psychiatric Classification ◽  
The Family

scholarly journals Upper Cretaceous amber arthropods and their implications on changes in insect community structure

1992 ◽  
Vol 6 ◽  
pp. 234-234
Author(s):  
E. M. Pike
Keyword(s):  
Species Richness ◽  
Upper Cretaceous ◽  
Terrestrial Ecosystems ◽  
Taxonomic Structure ◽  
Insect Community ◽  
Insect Communities ◽  
Insect Fauna ◽  
The Family ◽  
The Usa ◽  
The Baltic

Assessment of changes in terrestrial ecosystems since Cretaceous time, until recently, has had to rely on paleobotany (including paleopalynology) and vertebrate paleontology to provide data for analysis. Insects contribute a major portion of the terrestrial diversity in any ecosystem, but their fossil record and state of preservation had discouraged paleoecological study beyond the Pleistocene. With the discovery of prolific Upper Cretaceous amber deposits in Russia and Canada, and the investigation of Tertiary amber deposits from the Baltic, the Dominican Republic, Mexico and the USA, the prospect of clarifying changes in insect diversity and ecology over time becomes real. Methods are reported which allow the description of species richness and relative abundance of arthropod taxa from an Upper Cretaceous (Campanian: 75 MYA) amber deposit in Alberta, Canada. Diversity and abundance are described at the Order level for hexapods, and for the Acarina and Araneae. Taxa present, in order of abundance, are Homoptera (66 specimens/kg of amber), Diptera (28/kg), Acarina (21/kg), Hymenoptera (13/kg), Araneae (12/kg), Psocoptera (4/kg), Coleoptera (2/kg), Blattodea (1/kg), Thysanoptera (1/kg), Trichoptera (0.6/kg). Other orders present are Lepidoptera, Collembola, Dermaptera, Mantodea, and Ephemeroptera. In total, of 35 identified families, 8 are extinct. There are about 20 genera identified, of which only 1 is extant. All identified species are extinct. Estimated species richness is about 100 species of arthropods. In comparison, virtually all Families reported from Baltic amber (Oligocene) are still extant, as are the majority of genera. Morphology and feeding structures are well within the variation seen in modern insects. This suggests that throughout the Tertiary, Entomologists would feel quite at home with the insect fauna, and during the Upper Cretaceous, they would have little difficulty identifying insects at least to the family level. It is hypothesized that the taxonomic structure of modern insect communities was well established before the end of the Cretaceous, and that the structure and interrelationships of insect guilds were also very similar to those of today.

Sign in / Sign up

Export Citation Format

Share Document