Miracle-dz/UniFAR-FTUs huggingface dataset:
Spectrum Sharing with Multi-hop Relaying

Spectrum sharing is a technique in which some unlicensed users communicated with each other in the same frequency band as the licensed users. This is one of the most important methods to improve the utilization efficiency of the physically limited spectrum resources for the cognitive radio systems. However, how to improve the performance of the unlicensed users and simultaneously maintain the interference temperature, due to the transmission of the unlicensed users, at the licensed users is still an challenging problem. In this paper, we try to improve the performance of the spatial spectrum sharing system by using multi-hop relaying. Compared to the direct transmission, multi-hop relaying could reduce the interference temperature and introduce more flexibility on the transmission by using proper routing scheme. To investigate the performance gain of the multi-hop relaying, the achievable rate of the multihop relay channel for the spatial spectrum sharing system is studied and compared to the direct transmission. The optimal power allocation method is proposed and the conditions of which the multi-hop relaying improves the achievable rate of the direct transmission under the spatial spectrum sharing constraints are discussed.
EFFICIENT MICROPROPAGATION VIA SOMATIC EMBRYOGENESIS OF POTENTIAL CULTIVAR SAGAI OF PHOENIX DACTYLIFERA L .

The plantlets of date palm were regenerated using somatic embryogenesis. The combination of phytohormones, 5 mg BA/L and 80 mg 2,4-D/L gave the highest percentage of callus induction (88%) as compared to the other combinations. Moreover, significant differences were found between the explants (shoot tip and leaf primordia) in the induction of callus. The first initial callus emergence was observed in a shortest period (25.5 days) with above combination. The highest mean values index for the formation of embryogenic callus was 4.75 on MS medium containing 5 mg NAA/L and 2.5 mg BA/L. The best result on somatic embryogenesis was observed on 1/3 of MS medium, and 13 weeks of culture duration. The highest percent germination of somatic embryos was found 100% on MS media with full salt strength supplemented with 0.7 mg IBA/L or MS media having half salt strength supplemented with 0.5 mg IBA/L. The highest number of roots with length were observed on MS medium supplemented with 60 g/L of sucrose or 1⁄4 strength of MS medium. At the acclimatization stage, the combination of peat moss and perlite (2:1 ratio) gave the maximum percentage of survival of plants (86.66%) with significant difference.
USING EXPLICIT ARGUMENTATIVE INSTRUCTION TO FACILITATE CONCEPTUAL UNDERSTANDING AND ARGUMENTATION SKILLS IN SECONDARY SCHOOL CHEMISTRY STUDENTS

The study investigated effects of Argumentative instructional strategy on Chemistry students’ conceptual understanding of chemistry concepts in Senior Secondary Schools in Lagos state, Nigeria. 120 SS2 chemistry students from two randomly selected senior secondary schools in Lagos state formed the sample and quasi-experimental pre-test-post-test research design was used for the study. Chemistry Achievement Test and Questionnaire were used to collect data. The formulated hypotheses were tested using t-test statistical tool at 0.05 level while the raised research questions were answered using descriptive statistics. It was found out that students taught using Argumentative strategy achieved significantly higher than those taught using conventional method. Based on the findings, it was recommended among others that Chemistry teachers should adopt the use of Argumentative strategy in teaching chemistry.
Over-education and Italian Ph.D Graduates during the Great Recession

This paper evaluates the impact of the Great Recession on Ph.D over-education using data drawn from four annual cohorts of Ph.D graduates surveyed by the Italian National Institute of Statistics. Over-education is examined through the definitions of both overskilling and over-qualification. To assess the effect of the crisis, we adopt several proxies, among which economic resilience. To the best of our knowledge, this is the first time that the nexus over-education-resilience receives attention. The results show that over-skilling is negatively associated with the Great Recession. More generally, working on research-based activities and having study experience abroad are always significant drivers to overcome any kind of job mismatch. Conversely, being self-employed increases the risk of over-education, casting some doubts on the satisfactory additionality of Ph.D employment trajectories beyond academia and research. Finally, in contrast with previous results for graduates, we find that variables related to the family of origins do not exert a significant influence on Ph.D over-education.
Chapter 2 Improvement in GPS Orbit Determination at GFZ

Precise orbits of the GPS satellites are required at GFZ for generation of Earth’s gravity field models, precise determination of baselines between Low Earth Orbiters (LEOs) such as TerraSAR-X and TanDEM-X, for processing of various LEO radio occultation data as well as in research following the integrated approach where ground and space-borne GPS data are used together to estimate parameters needed for determination of a geodetic terrestrial reference frame. For this GFZ has implemented many GPS modelling improvements including GPS phase wind-up and attitude model, improved ambiguity fixing, absolute antenna phase centre offsets and variations, global constrains for the terrestrial reference system, frame transformation according to IERS Conventions 2010, higher order ionospheric corrections and improvements in the parameterization of the solar radiation pressure model. In this paper the influence of all these modelling improvements on the accuracy of the GPS orbits is presented. It is shown, that the application of the new models reduced the mean 3D difference of our orbits from 7.76 to 3.01 cm when compared to IGS final orbits.
Effect of Library staff Attitudes on Job Performance: A study of the Library of Alex Ekwueme Federal University, Ebonyi State, Nigeria

Staff performance is a very crucial aspect of librarianship when it comes to provision of library services in any university library. In this context, the role of library staff of any sort is very paramount in satisfying the information needs of their teeming users. Given the nature of work, the degree of stress and the working hours that the human capital of university library have; studying factors that have an impact on their job attitude becomes a necessity for the library management. Performance of such employees is influenced by Job related attitudes like satisfaction, leadership, work commitment and job involvement. Employee performance is the summation of commitment and involvement towards their organization and its value. An employee with positive attitude is well aware about the dynamics of business, can fine tune to organisational environment, leading to a holistic development in the performance and productivity of the entire organization. Keeping these facets as background, this research paper investigates the impact and factors that lead to better productivity of library staff members. An empirical investigation was done to identify the factors that have a bearing on work attitudes and the survey was carried out in the university library. Statistically the information was tested and validated. P test, F test, correlation and regression showed a significant relationship between the attitudes of library staff and performances. This study suggested some human resource development policies in libraries to creating more positive attitude on the staff.
Assertiveness and Self-Esteem in Indian Adolescents

Assertiveness and self-esteem in adolescents are the instruments for expressing themselves without any psychological disturbances in different situations. It is essential for a better emotional wellbeing and to maintain socially supportive relationships. Methodology: A descriptive correlation survey research design was adopted for the collecting data from sixty adolescents from a selected children hospital, OPD, Bangalore using simple random sampling technique. Rathus Assertiveness Schedule and Rosenberg SelfEsteem Scale were used to assess the assertiveness and self-esteem in adolescents. The data were analysed using descriptive and inferential statistics. Results: Majority of the adolescents were moderately assertive, 75% and 53.33% had high self-esteem. A significant positive correlation was (rs=0.64) was found between the assertive behaviour and self-esteem of the adolescents. Significant association were found between the assertive scores with the age & education level of the adolescents(x 2 =7.16 & 6.13). Education level of the adolescents was the only variable significantly associated between the assertive and self-esteem scores (x 2 =14.08).
Tributyltin ( TBT ) antifoulants : a tale of ships , snails and imposex

There is little doubt that, without some form of control, the accumulation of marine fouling communities on vessels and manmade structures at sea increases drag and, in the case of vessels, fuel consumption, with substantial consequences in terms of economics and emissions. There is no doubt, also, that tributyltin (TBT) compounds (and the less widely used triphenyltins) are extremely effective and relatively economical as antifouling biocides, contributing to the rapid take-up of organotin-based paints by the shipping industry and small boat owners in the 1970s. These two arguments have formed the basis of the defence of TBT antifouling formulations since the first undesirable consequences of their use became apparent in the late 1970s, and indeed are still cited today by proponents of their continued suitability (for example, see Evans, 2000; Abel, 2000). What is missing from such evaluations, of course, is proper consideration not only of the quantifiable financial losses suffered by the aquaculture industry and imposed upon harbour authorities as a result of the widespread application of TBT paints, but also of the broader environmental ‘costs’ which led initially to restrictions on use and which now underlie the decision for a global phase-out.
A blind spot in today ’ s macroeconomics ? 1

We have got so used to it that we hardly notice it. It is the idea that, for all intents and purposes, when making sense of first-order macroeconomic outcomes we can treat the economy as if its output were a single good produced by a single firm. To be sure, economists have worked hard to accommodate variety in goods and services at various levels of aggregation. Moreover, just to mention two, the distinctions between tradeables and non-tradeables or, in some intellectual strands, between consumption and investment goods have a long and distinguished history. But much of the academic and policy debate among macroeconomists hardly goes beyond that, if at all.
Charlie Vogelheim

The inquiline invertebrate metacommunity living in the leaves of the purple pitcher plant (Sarracenia purpurea) consist of individual aquatic populations living separate from one another, but connected through dispersal. The dispersal of invertebrates between the pitchers is necessary for the colonization of new pitcher environments. I hypothesized that the protozoan and rotifers of these communities disperse between pitchers passively through the wind and rain rather than using pitcher-frequenting animals as vectors. Water and detritus were added to forty cleaned out pitchers (20 real, 20 artificial). Half of the pitchers were covered with a fine mesh restricting animal access to the pitchers and half were left open. This study tracked the richness, abundance, and diversity of the organisms that appeared in the pitchers over a two week period. There was no difference between the richness (p=0.61), abundance (p=0.30), or diversity (p=0.51) between the covered and open pitcher communities suggesting that the invertebrates disperse aerially and that animals play no important role as dispersing vectors. There was lower richness (p<0.01), abundance (p<0.01), and diversity (p<0.01) in the artificial pitchers than the real because there was no oxygenation of the water in the artificial tubes, as in the pitchers. It was concluded that the abiotic, passive means of dispersal that these organisms practice stabilizes the otherwise fragile inquiline community living in the pitchers.
Replication Study Is narcissism associated with baseline cortisol in men and women ?

Narcissism is a personality trait characterized by feelings of grandiosity, a craving for admiration, and a lack of empathy. Although there are reasons to expect that narcissism might have adverse physiological and health implications, very little research has directly assessed such claims. Moreover, prior research specifically assessing links between narcissism and basal levels of the stress hormone cortisol yields mixed evidence. In an attempt to reconcile previously inconsistent findings, we examined narcissism and basal cortisol in a sample of 366 young adults. We found little evidence for an association between narcissism and cortisol. We discuss how narcissism may be related to physiological outcomes over time and across situations. 2016 Elsevier Inc. All rights reserved.
Call for papers ROLLING REGRESSION CAPM ON ZAGREB STOCK EXCHANGE – CAN INVESTORS PROFIT FROM IT ?

This paper explores possibilities of using rolling regression CAPM on the Zagreb Stock Exchange in portfolio and risk management. Since original model has many flaws, one of them including the assumption of constant parameters in the model, extending the model with the assumption of changing parameters over time could lead to better results regarding portfolio risk and return. Furthermore, the rolling regression approach to CAPM estimation has not yet been observed on the Croatian and similar CEE markets, to the knowledge of the author. Weekly data on five sector indices from Zagreb Stock Exchange and the market index CROBEX with 91 day T-bill rates have been used for the period January 2012 – April 2018 in order to evaluate rolling regression CAPM on the Croatian market. Results from the analysis are used in simulating portfolio strategies in order to evaluate their performance regarding risk and return. Results indicate that such trading strategies could lead to better portfolio risk and return characteristics compared to the CROBEX benchmark, with the inclusion of transaction costs as well.
Imaging Organic and Biological Materials with Low Voltage Scanning Electron Microscopy Application Note

Introduction Scanning electron microscopy has become a popular imaging tool in different areas of science and engineering . Being able to elucidate the structure of a material at the micro-and/or the nano-scale level is indeed crucial to characterizing the material, understanding its mechanism and mode of formation, and explaining/predicting its properties and performance under a given set of environmental or load conditions . Secondary electron imaging is commonly used to reveal surface topography, grain morphology and size, phase composition, and fracture profi le. In such cases highest resolution and contrast are needed to illustrate the fi nest structural features. However, imaging of organic and biological specimens represents a real challenges to investigators. We discussed briefl y in a previous note [10] the options available to overcome these diffi culties. With the Agilent 8500 low voltage scanning electron microscope (FE-SEM), imaging of organic and biological materials is strongly facilitated . For this application note, we present here imaging data obtained with Agilent 8500 FE-SEM for different materials: (1) chemical and physicalchemical gelling of bioinjectable copolymers NC-NCA being explored as an alternative treatment for brain aneurism; (2) HeLa cervical cancer cells used to study the effect of irreversible electroporation on adherent cells; (3) bioticallyprecipitated calcium carbonate induced by CO2-producing bacteria and enzyme for soil improvement.
The Effects of Structural Clutter and Open Water on Insectivorous Bat Activity in Palustrine Habitats BIOS 35502 : Practicum in Environmental Field

I examined relative species activity of six species of bats found in the Upper Peninsula of Michigan across spectra of horizontal and vertical clutter and open water at 32 palustrine sites. Using Anabat II detection systems, I recorded echolocation activity (number of calls per species) at each site. I found that little brown bat activity decreased with increasing vertical clutter (R = 0.147, p = 0.017), while red bat activity decreased with increasing horizontal clutter (R = 0.302, p = 0.001). Furthermore, hoary bat activity increased with area of open water (R = 0.174, p = 0.007), while northern myotis presence showed the opposite trend (R = 0.224, p = 0.004). I concluded that physical habitat factors seem to influence individual species independently. Second, with the exception of the northern myotis, bat species in this region generally exhibited greater activity in palustrine habitats with lower structural clutter and greater areas of open water. Introduction: Insectivorous bat activity as a topic of research in palustrine habitats has been highly undefined in the Upper Peninsula of Michigan (Francl 2005). In particular, the effect of structural clutter within similar sites has been the basis for a wide variety of hypotheses on bat activity. These hypotheses are contingent upon a multiplicity in insectivorous bat response both within and between species. Researchers have speculated that factors influencing these differences in response
Behavioral / Systems / Cognitive Dopamine , Time , and Impulsivity in Humans

Alex Pine,1,2 Tamara Shiner,1 Ben Seymour,1,3,4 and Raymond J. Dolan1 1Wellcome Trust Centre for Neuroimaging, London WC1N 3BG, United Kingdom, 2Clinical Psychopharmacology Unit, Sub-Department of Clinical Health Psychology and 3Economic and Social Research Council Centre for Economic Learning and Social Evolution, University College London, London WC1E 6BT, United Kingdom, and 4Department of Clinical Neurology, Addenbrookes Hospital, Cambridge CB2 OQQ, United Kingdom
Study of life cycle Helicoverpa armigera (Hub.) on different artificial diet

The Bio control Laboratory, in Department of Entomology, S. V. Patel Univ. of Agri. and Tech., Meerut and field experiment at Basmati Export Development Foundation (BEDF), Meerut was conducted entitled “Study of life cycle of Helicoverpa armigera (Hub.) on different artificial diet” were during Rabi seasons of 2016-17. Chickpea flour diet is good for rearing of H. armigera where it showed minimum larval duration, larval mortality, pupal duration and male emergence, and maximum weight per larva, size of larva, weight per pupa, female emergence and normal emergence followed by moongbean, chickpea leaves and pods (control) is good for rearing of H. armigera larva. Whereas soya bean flour diet has maximum larval mortality and showed less suitability for rearing of larva compared to chickpea flour, moong bean flour, chickpea leaves and pods (control). Among all diets wheat flour diet is least suitable for rearing of H. armigera where it has maximum larval duration, pupal duration and larval mortality and has minimum pupal recovery and normal emergence. Among 5 different diets, chickpea flour mediated diets along with other essential ingredients are found very conducive to get good quality culture of H. armigera. Mungbean and soybean were the other main ingredients of diets that can be used for successful culture rearing
Seasonal dynamics of arthropods in the humid native forests of Terceira Island ( Azores )

This work aims to provide a first detailed description of the results obtained in a seasonal abundance study of arthropods in the native pristine humid forest from Terceira Island (Azores). Ten sites were sampled during four years with SLAM (Sea, Land, and Air Malaise) traps targeting several arthropod taxa with good dispersal abilities as well as epigean species crawling into the trap. Samples were taken every three months in nine sites between 2012 and 2016 and monthly in one of the sites between 2014 and 2015. A total of 147 arthropod species and morphospecies were sampled mostly belonging to Hemiptera, Araneae and Coleoptera. Four endemic species, the tree lace-hopper Cixius azoterceirae, the capsid bug Pinalitus oromii, the bristletail Trigoniophthalmus borgesi and a morphospecies of Aleyrodidae accounted for 50% of all adult specimens. Most species peak in abundance in summer, but monthly data allowed the identification of other seasonal patterns.
Positioning film tourism at the top of mental awareness : some explanatory insights from the Jordanian case

The production of film-induced tourism has lately gained extensive support in global tourism literature and among destination promotions alike, with limited attention given to movie locations in developing countries, including reality TV programmes sets. This paper gives witness to the effect of motion pictures including Lawrence of Arabia, Indiana Jones and the Last Crusade, and The Martian movie, upon tourist visitation selection. For this purpose a conceptual 3 P’s model was developed to explore the extent and influence to position film locations in the top of mind awareness for potential tourists. This integration was conducted using a total of 35 interviews with tourists as respondents from different nationalities during their trip to a Jordanian destination, and by referring to each film’s blog site. The data received was from a content analysis from the interviews, and the frequency results indicated that film tourism is a secondary motive tourism experience due to the missing of the idea of identifying film location in narratives indicative in understood language, short time shooting of scenes, and the run of productions of films. The results do not disregard the idea that a strong perceived awareness has been achieved by watching reality TV shows as types of documentary series rather than cinema movies. Grounded on our empirical analysis, this paper proposes a research agenda that integrates the real socio-cultural attributes of the destination to film tourism production.
Leafing Patterns and Drivers across Seasonally Dry Tropical Communities

Investigating the timing of key phenological events across environments with variable seasonality is crucial to understand the drivers of ecosystem dynamics. Leaf production in the tropics is mainly constrained by water and light availability. Identifying the factors regulating leaf phenology patterns allows efficiently forecasting of climate change impacts. We conducted a novel phenological monitoring study across four Neotropical vegetation sites using leaf phenology time series obtained from digital repeated photographs (phenocameras). Seasonality differed among sites, from very seasonally dry climate in the caatinga dry scrubland with an eight-month long dry season to the less restrictive Cerrado vegetation with a six-month dry season. To unravel the main drivers of leaf phenology and understand how they influence seasonal dynamics (represented by the green color channel (Gcc) vegetation index), we applied Generalized Additive Mixed Models (GAMMs) to estimate the growing seasons, using water deficit and day length as covariates. Our results indicated that plant-water relationships are more important in the caatinga, while light (measured as day-length) was more relevant in explaining leafing patterns in Cerrado communities. Leafing behaviors and predictor-response relationships (distinct smooth functions) were more variable at the less seasonal Cerrado sites, suggesting that different life-forms (grasses, herbs, shrubs, and trees) are capable of overcoming drought through specific phenological strategies and associated functional traits, such as deep root systems in trees.