Signatures of spin in the n=1/3 Fractional Quantum Hall Effect

The activation gap Delta of the fractional quantum Hall state at constant filling n =1/3 is measured in wide range of perpendicular magnetic field B. Despite the full spin polarization of the incompressible ground state, we observe a sharp crossover between a low-field linear dependence of Delta on B associated to spin texture excitations and a Coulomb-like behavior at large B. From the global gap-reduction we get information about the mobility edges in the fractional quantum Hall regime.Comment: 4 pages, 3 figure

Mild cognitive impairment: a systematic review

MCI is a nosological entity proposed as an intermediate state between normal aging and dementia. The syndrome can be divided into two broad subtypes: amnestic MCI ( aMCI) characterized by reduced memory, and non- amnestic MCI ( naMCI) in which other cognitive functions rather than memory are mostly impaired. aMCI seems to represent an early stage of AD, while the outcomes of the naMCI subtypes appear more heterogeneous - including vascular dementia, frontotemporal dementia or dementia with Lewy bodies- but this aspect is still under debate. MCI in fact represents a condition with multiple sources of heterogeneity, including clinical presentation, etiology, and prognosis. To improve classification and prognosis, there is a need for more sensitive instruments specifically developed for MCI as well as for more reliable methods to determine its progression or improvement. Current clinical criteria for MCI should be updated to include restriction in complex ADL; also the diagnostic and prognostic role of behavioral symptoms and motor dysfunctions should be better defined. A multidisciplinary diagnostic approach including biological and neuroimaging techniques may probably represent the best option to predict the conversion from MCI to dementia. In this review we discuss the most recent aspects related to the epidemiological, clinical, neuropathological, neuroimaging, biochemical and therapeutic aspects of MCI, with specific attention to possible markers of conversion to dementia

Macroscopic fluctuations theory of aerogel dynamics

We consider the thermodynamic potential describing the macroscopic fluctuation of the current and local energy of a general class of Hamiltonian models including aerogels. We argue that this potential is neither analytic nor strictly convex, a property that should be expected in general but missing from models studied in the literature. This opens the possibility of describing in terms of a thermodynamic potential non-equilibrium phase transitions in a concrete physical context. This special behaviour of the thermodynamic potential is caused by the fact that the energy current is carried by particles which may have arbitrary low speed with sufficiently large probability.Comment: final versio

Evaluasi Kesesuaian Lahan Untuk Padi Sawah Tadah Hujan (Oryza Sativa L.) Di Kecamatan Muara Kabupaten Tapanuli Utara

This study aimed to evaluate the suitability of land in Muara North Tapanuli for rainfed paddyfields. Based on a map of soil type and slope maps generated from topographic maps with a scaleof 1: 50,000, then be overlaid. Raised 3 LMU(Land Map Unit) are eligible to be assessed for rainfedpaddy crop. The assessment of land suitability classes with appropriateness rainfed paddy fieldscriteria is based on Djaenuddin, et al., 2011. The results showed that the potential land suitabilityclass LMU 1 isN (rc), potential land suitability class LMU 2 is S3 (tc), potential land suitabilityclass LMU 3 is S3 (tc, rc). Potential land area for rainfed paddy fields in the district of Muara is of1844 hectares

Kajian Kesuburan Tanah Di Desa Sihiong, Sinar Sabungan Dan Lumban Lobu Kecamatan Bonatua Lunasi Kabupaten Toba Samosir

This study aims to examine the fertility of the soil in the Sihiong Village, Sinar Sabungan Villageand Lumban Lobu Village, Bonatua Lunasi Subdistricts, Toba Samosir District. This research wasconducted in Sihiong Village, Sinar Sabungan Village and Lumban Lobu Village, SubdistrictsBonatua Lunasi, District Toba Samosir and Laboratory analysis of samples carried out in Researchand Technology, Faculty of Agriculture, University of North Sumatra. The method used in thisstudy is a survey method to make observations on the soil profile and on each layer of the soilhorizon to compare the soil fertility.The soil in the village Sihiong have a somewhat acidic soil pH,organic matter content is moderate, moderate cation exchange capacity capability, very low basesaturation while high levels of total soil ferrum. The soil in the Village Sinar Sabungan have acidicsoil pH, organic matter content is moderate, the ability of the cation exchange capacity of themedium, which is very low base saturation while high levels of total soil ferrum. The soil fertility inthe village of Lumban Lobu have acidic soil pH, organic matter content is moderate, the ability ofthe cation exchange capacity of the medium, which is very low base saturation while high levels oftotal soil ferrum

From CRM to social CRM: A bibliometric review and research agenda for consumer research

Contemporary perspectives on customer relationship management and the parent concept of customer management gathered momentum in the mid-1980 s and early 1990s. The advent of digital technologies, especially social media, have prompted a further evolution of the concept. As a result, today's CRM systems must consider new measures, such as customer engagement and advocacy. Consequently, organisations’ social CRM activities and investments have consistently increased in part underpinned by the increased usage of these technologies by consumers. Through a systematic literature review and bibliometric analysis, we identify three main themes in which research in this area has focused on: (1) CRM and impact on performance, (2) social media capabilities and CRM, and (3) CRM processes and strategic use. We also identify future research avenues in the field derived from our analysis of the literature, emphasising the implications for consumer research

The role of organizational citizenship behavior and gender between job satisfaction and task performance

Job satisfaction (JS) is an indicator of individual psychosocial health. Consistent evidence showed that voluntary extra-role behavior in organizations, namely organizational citizenship behavior (OCB), can also contribute to individual psychological health. JS has been found to positively influence employees’ OCB, and both JS and OCB have been found to predict employees’ task performance (TP). The purpose of this study was to investigate whether employees’ OCB mediates the relationship of JS with TP, taking into consideration gender as a potential moderator, and other sociodemographic and work-related characteristics as confounding variables. A total of 518 employees, 54.6% women, aged 19–66 years with a mean age of about 36 years, completed measures of JS, OCB, and TP. Results showed a partial mediation of OCB in the JS-TP relationship, which was invariant across gender. A potential practical implication of findings is that human resource managers and practitioners might ultimately benefit male and female employees’ well-being as well as the organizations’ productivity by developing targeted individual-and group-level trainings and interventions to enhance JS and OCB

Ex vivo physiological compression of human osteoarthritis cartilage modulates cellular and matrix components

Mechanical stimulation appears to play a key role in cartilage homeostasis maintenance, but it can also contribute to osteoarthritis (OA) pathogenesis. Accumulating evidence suggests that cartilage loading in the physiological range contributes to tissue integrity maintenance, whereas excessive or reduced loading have catabolic effects. However, how mechanical stimuli can regulate joint homeostasis is still not completely elucidated and few data are available on human cartilage. We aimed at investigating human OA cartilage response to ex vivo loading at physiological intensity. Cartilage explants from ten OA patients were subjected to ex vivo controlled compression, then recovered and used for gene and protein expression analysis of cartilage homeostasis markers. Compressed samples were compared to uncompressed ones in presence or without interleukin 1ß (IL-1ß) or interleukin 4 (IL-4). Cartilage explants compressed in combination with IL-4 treatment showed the best histological scores. Mechanical stimulation was able to significantly modify the expression of collagen type II (collagen 2), aggrecan, SOX9 transcription factor, cartilage oligomeric matrix protein (COMP), collagen degradation marker C2C and vascular endothelial growth factor (VEGF). Conversely, ADAMTS4 metallopeptidase, interleukin 4 receptor alpha (IL4Ra), chondroitin sulfate 846 epitope (CS846), procollagen type 2 C-propeptide (CPII) and glycosaminoglycans (GAG) appeared not modulated. Our data suggest that physiological compression of OA human cartilage modulates the inflammatory milieu by differently affecting the expression of components and homeostasis regulators of the cartilage extracellular matrix