Filtyp
Due to increasing life expectancy and a number of social factors, at least in the Western world, an increasing proportion of men who are considered to belong to an “older age group” have the wish of becoming fathers. One of the reasons is that many women postpone their first pregnancy, which automatically leads to higher age of the potential fathers. Furthermore, divorce and building new families
Over the years several models have been developed to describe hydrophobic pervaporation. The different approaches can be generally classified as process-orientated or membrane-orientated. Among these models the resistance-in-series model (RSM) has a unique position since it combines process conditions with membrane parameters. The aim of this work is to demonstrate the extension of the RSM to c
This paper considers the role of digital recording methods and visualisation tools in the primary recording of archaeology at the Neolithic tell site of Çatalhöyük, Turkey. Operating within and building on Çatalhöyük Research Project's understanding of reflexive methods (Hodder 2000b, 2003; Berggren and Nilson 2014; Berggren et al. 2015) we incorporate elements of science and technology studies (P
Kisel är ett vanligt förekommande grundämne som gärna bildar en oxid, nämligen kiseldioxid. Kiseldioxid träffar man i hög utsträckning på i det dagliga livet. Det är nämligen huvudbeståndsdelen i sand, glasvaror, kvarts, många keramiska material men också i den färgskiftande ädelstenen opal. Det finns också flera grupper av porösa kiseldioxidmaterial, till exempel så kallade zeoliter som har myckeThe formation process of porous silica materials is an intricate process, involving a number of components that interact to form a highly organized material. Both zeolites and mesoporous silica materials typically require the presence of organic structure director agents (SDAs) around which the silica network polymerizes. For zeolites the SDAs are molecular and for mesoporous silica the SDAs assem
The presence of 5‐HT (serotonin) in ovarian tissue and its varying concentrations during the oestrous cycle suggests that it takes part in ovarian function and in the ovulatory process as one of several mediators of the inflammatory‐type reaction preceding follicular rupture. With the aid of a recirculating perfusion model, in which the central stimulatory action of 5‐HT was avoided, its direct ov
In the social sciences, many quantitative research findings as well as presentations of demographics are related to participants’ gender. Most often, gender is represented by a dichotomous variable with the possible responses of woman/man or female/male, although gender is not a binary variable. It is, however, rarely defined what is meant by gender. In this article, we deconstruct the concept ‘ge
Dark matter is abundant in the universe, yet its composition and nature are unknown. If dark matter consists of new particles with nonzero interactions with Standard Model particles, it could be produced and detected or inferred by collider experiments. This thesis describes searches for dark matter models with new spin-1 force mediators coupling dark matter to quarks, using the ATLAS detector at
Engineered bamboo has recently received lots of attention of civil engineers and professional researchers due to its better mechanical performance than that of softwood timber. Parallel strand bamboo is one important part of engineered bamboo for its excellent durable performance compared to the laminated veneer bamboo. The required curing temperature in hot-pressing process is usually higher than
In its judgment in International Stem Cell Corporation v Comptroller General of Patents (ISCO) rendered on 18th December 2014, the CJEU qualified its’ earlier ruling in Brüstle v. Greenpeace (Brüstle) with regard to non-fertilised human ovums stimulated by parthenogenesis. The Court held that in order to constitute a ‘human embryo’ and thus to be unpatentable under the EU Biotechnology Directive,
The aim of this study is to evaluate a new pedagogic approach implemented in a compulsory materials course for product design students at bachelors level at ABC University. When developing a new curriculum for the material course, a decision was made to teach materials and production methods in a contextualized setting with emphasis on how students can deal with materials in a design process. Meth
In 1997 Sweden was the third biggest exporter of popular music in the world. This astonishing fact has often been explained as being the result of the large investments in municipal music schools that took place in Sweden from 1940. The explanation holds an interesting paradox. Most municipal music schools began with the aim to teach young people appreciate more valuable music (i.e. classical) tha
The new estimates of the Maddison Project show that GDP per capita ratio at purchasing power parity (ppp) between Bolivia and Finland has changed from 0.68 ca. 1850 to 0.16 in 2015; similarly, that between Chile and Norway from 0.65 to 0.28. The aim of this article is to present a review of the literature and available quantitative evidence to understand how these extreme differences became possib
Diesel engines are by far the most common means of propulsion aboard ships. It is estimated that around half of their fuel energy consumption is dissipated as low-grade heat. The organic Rankine cycle technology is a well-established solution for the energy conversion of thermal power from biomass combustion, geothermal reservoirs, and waste heat from industrial processes. However, its economic fe
Three different models (STEP–GENDEC–NOflux, Zhang2010, and Surfatm) are used to simulateNO, CO2, and NH3 fluxes at the daily scale for 2 years(2012–2013) in a semi-arid grazed ecosystem at Dahra(152401000 N, 152505600W, Senegal, Sahel). Model resultsare evaluated against experimental results acquired duringthree field campaigns. At the end of the dry season, when thefirst rains re-wet the dry soilThree different models (STEP–GENDEC–NOflux, Zhang2010, and Surfatm) are used to simulate NO, CO2, and NH3 fluxes at the daily scale for 2 years (2012–2013) in a semi-arid grazed ecosystem at Dahra (15∘24′10′′ N, 15∘25′56′′ W, Senegal, Sahel). Model results are evaluated against experimental results acquired during three field campaigns. At the end of the dry season, when the first rains re-wet the
This paper presents a wireless power transmission system which is able to deliver power to multiple loads by making use of a time-division multiplexing technique. Similar loads are placed into the slots in a row, and two power transmitters, at the bottom and top, supply them with sufficient amount of power. This system operates in two phases; within one phase, the transmitters are in-phase, and th
