6,860 research outputs found
The Impact of Employment Web Sites' Traffic on Unemployment: A Cross Country Comparison
Although employment web sites have recently become the main source for re-
cruitment and selection process, the relation between those sites and unemploy-
ment rates is seldom addressed. Deriving data from 32 countries and 427 web
sites, this study explores the correlation between unemployment rates of
European countries and the attractiveness of country specific employment web
sites. It also compares the changes in unemployment rates and traffic on all
the aforementioned web sites. The results showed that there is a strong
correlation between web sites traffic and unemployment rates.Comment: 9 page
Waveform Design for 5G and Beyond
5G is envisioned to improve major key performance indicators (KPIs), such as
peak data rate, spectral efficiency, power consumption, complexity, connection
density, latency, and mobility. This chapter aims to provide a complete picture
of the ongoing 5G waveform discussions and overviews the major candidates. It
provides a brief description of the waveform and reveals the 5G use cases and
waveform design requirements. The chapter presents the main features of cyclic
prefix-orthogonal frequency-division multiplexing (CP-OFDM) that is deployed in
4G LTE systems. CP-OFDM is the baseline of the 5G waveform discussions since
the performance of a new waveform is usually compared with it. The chapter
examines the essential characteristics of the major waveform candidates along
with the related advantages and disadvantages. It summarizes and compares the
key features of different waveforms.Comment: 22 pages, 21 figures, 2 tables; accepted version (The URL for the
final version:
https://onlinelibrary.wiley.com/doi/abs/10.1002/9781119333142.ch2
Global Imbalances, Current Account Rebalancing and Exchange Rate Adjustments
We analyze the global imbalances and the required adjustments for rebalancing in current accounts and real exchange rates. We set up a two-country two-sector model for the US- China with two asymmetries. First, we assume that the size of China initially is one third of the US but its size becomes half of the US in the next ten years consistent with the fast growth expectations in China. Secondly, we assume that China initially runs a net export surplus against the US. Then we quantitatively study two adjustment scenarios. First scenario,called Slow Adjustment, assumes that in the process of growth, Chinese demand composition moves more towards domestic non-tradable sector. In this case, Chinese real exchange rate appreciates gradually and net export surplus also decreases slowly. Second scenario, called Quick Adjustment, assumes that in addition to the higher non-tradable share in output, net export surplus against US goes to zero quickly in fiïżœve years. In this case, net export adjustment happens quickly and real exchange rates in China also appreciate faster and at a higher rate than Slow Adjustment case. Even though, global imbalances are eliminated faste in the Quick Adjustment case, high real appreciation in China hurts importers in the US. A comparison in terms of output shows that Slow Adjustments is preferred for both countries.Global imbalances, Current accounts, Exchange rate adjustments
Effects of sewage sludge on heavy metal accumulation in soil and plants and on crop productivity in Aleppo governorate
Sewage sludgeHeavy metalsCrop productionCropsOrganic matterSoil
Gene Expression changes in aging zebrafish (Danio rerio) brains are sexually dimorphic
Cataloged from PDF version of article.Background: Brain aging is a multi-factorial process due to both genetic and environmental factors. The zebrafish
has recently become a popular model organism for examining aging and age-related diseases because as in
humans they age gradually and exhibit cognitive decline. Few studies have examined the biological changes in the
aging brain that may contribute to these declines and none have examined them within individuals with respect to
gender. Our aim was to identify the main genetic pathways associated with zebrafish brain aging across gender. We
chose males and females from specific age groups (young, 7.5-8.5 months and old, 31-36 months) based on the
progression of cognitive decline in zebrafish. RNA was isolated from individual brains and subjected to microarray and
qPCR analysis. Statistical analyses were performed using a two-way ANOVA and the relevant post-hoc tests.
Results: Our results demonstrated that in the brains of young and old male and female zebrafish there were over 500
differentially expressed genes associated with multiple pathways but most notably were those related to neurogenesis
and cell differentiation, as well as brain and nervous system development.
Conclusions: The gene expression of multiple pathways is altered with age and differentially expressed in males and
females. Future studies will be aimed at determining the causal relationships of age-related changes in gene expression
in individual male and female brains, as well as possible interventions that counteract these alterations
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