On the impossibility of inferring cohort fertility measures from period fertility measures

A particularly important struggle faced by demographic analysts is, how to arrive at statements about family formation processes from a cohort perspective from data that are essentially collected on an annual basis. The present paper is concerned with this struggle, mostly restricted to the case of fertility. The central question investigated here is: given observed period data, what can we conclude about the completed family size of real women? I review several existing methods to infer cohort fertility from period fertility measures. The conclusion is that, for each method, its justifiability can be verified only empirically: by looking at cohort fertility directly. To illustrate how this can be done, the paper analyses fertility data from a cohort perspective for two countries, Italy and the Netherlands.cohort fertility, demographic transition, fertility, Italy, Netherlands, period adjustment, tempo and quantum, total fertility rate

Order isomorphisms between cones of JB-algebras

In this paper we completely describe the order isomorphisms between cones of atomic JBW-algebras. Moreover, we can write an atomic JBW-algebra as an algebraic direct summand of the so-called engaged and disengaged part. On the cone of the engaged part every order isomorphism is linear and the disengaged part consists only of copies of $\mathbb{R}$. Furthermore, in the setting of general JB-algebras we prove the following. If either algebra does not contain an ideal of codimension one, then every order isomorphism between their cones is linear if and only if it extends to a homeomorphism, between the cones of the atomic part of their biduals, for a suitable weak topology

Education at home: the age-specific pattern of migration between the Netherlands and the former Dutch East Indies around 1930

The 1930 population census of the former Dutch East Indies (currently Indonesia) shows for the European population a striking shortage in the age range 10-20. This paper deals with the possible causes of this constriction in the age structure, in particular, the phenomenon of European children attending secondary education in the Netherlands. Using sample data from the city of The Hague, it is estimated that the proportion of students in the Netherlands born in the Dutch Indies was about 3 per cent, implying than the teenager gap in the Dutch Indies was for about half due to a cohort effect and for the other half due to the ‘education at home’ effect.age structure, age/aging, census, colonial times, Dutch East Indies, education, Europe, Europeans, Indonesia, migration, secondary education

Thiorhodococcus mannitoliphagus sp. nov., a new purple sulfur bacterium from the White Sea

A novel purple sulfur bacterium, strain WS(T), was isolated from a microbial mat from an estuary of the White Sea. Individual cells are coccoid shaped, motile by flagella and do not contain gas vesicles. The mean cell diameter is 1.85 mum (range 1.5-2.0 mum). Cell suspensions exhibit a purple-violet colour. They contain bacteriochlorophyll a and carotenoids of the rhodopinal series as photosynthetic pigments. The novel bacterium is an anoxygenic photoautotroph, using sulfide, thiosulfate, sulfite and elemental sulfur as electron donors for photosynthesis and is capable of photoassimilating several organic carbon sources in the presence of carbonate and a reduced sulfur source (sulfide and/or thiosulfate). Sulfur globules, formed during oxidation of sulfide, are stored transiently inside the cells. Optimal salinity and pH for growth are at 0.5-2.0 % NaCl and pH 7.0-7.5. The DNA base composition of strain WS(T) is 61.8 mol% G+C. 16S rRNA gene sequence analysis showed that the new isolate belongs to the genus Thiorhodococcus, with Thiorhodococcus minor CE2203(T) as the nearest relative (sequence similarity of 97.3 %). Several distinct differences from described species necessitate the description of a novel species. Thiorhodococcus mannitoliphagus sp. nov. is the proposed name, with strain WS(T) (=ATCC BAA-1228(T)=VKM B-2393(T)) as the type strain

Energieprestatiecertificaten, alias energielabels

energieprestatiecertificate

Noot bij ktr. Utrecht 16 september 2008, BF0857

Bovenstaand vonnis heeft veel aandacht in de pers gekregen. Het is opvallend omdat de rechter oordeelt dat het plegen van ontuchtige handelingen met een kind van een gezin uit hetzelfde flatgebouw geen tekortkoming in de huurovereenkomst oplevert, maar dat de weigering om te verhuizen naar een andere woning van verhuurder onder ontvangst van een redelijke verhuiskostenvergoeding, daarentegen wel als niet goed huurderschap kwalificeert. De eerste conclusie geeft blijk van een beperkte opvatting van het begrip overlast en de tweede conclusie is opmerkelijk, omdat het de overeenkomst aanvult met nog niet eerder aangenomen huurdersverplichtingen. Reden om nader stil te staan bij de huurdersverplichtingen ex art. 7:213 BW binnen het kader van de gegeven casus. Ook voor wat betreft de overige overwegingen wordt het vonnis nader onder de loep genomen

<em>Marichromatium indicum</em> sp. nov., a new purple sulfur Gammaproteobacterium from mangroves of Goa, India

A reddish-brown bacterium was isolated from photoheterotrophic enrichments of mangrove soil from the western coast of India, in a medium that contained 10 % (w/v) NaCl. Phylogenetic analysis on the basis of 16S rRNA gene sequences showed that strain JA100T clusters with species of the genus Marichromatium of the class ‘Gammaproteobacteria’. Cells of strain JA100T are Gram-negative, motile rods with monopolar single flagella; they require NaCl, the optimum concentration being 1–4 %, and tolerate concentrations up to 13 %. The strain has vesicular internal membrane structures, bacteriochlorophyll a and, most probably, carotenoids of the spirilloxanthin series. No growth factors are required. A reduced sulfur source is required for growth, and, during growth on reduced sulfur sources as electron donors, sulfur is intermediately deposited as a single large granule within the cell. Strain JA100T could not grow at the expense of other tricarboxylic acid cycle intermediates, except malate. On the basis of 16S rRNA gene sequence analysis and its morphological and physiological characteristics, strain JA100T is sufficiently different from other Marichromatium species to justify its designation as a novel species, for which the name Marichromatium indicum sp. nov. is proposed. The type strain is JA100T (=DSM 15907T=ATCC BAA-741T=JCM 12653T)