Miracle-dz/UniFAR-FTUs huggingface dataset:
How Sub-Optimal—If at All—Is Goal-Based Asset Allocation?

Following the success enjoyed by goal-based allocation over the last several years, the author investigates what the focus away from traditional finance and toward behavioral finance may be costing, if anything, in terms of traditional investment efficiency. The author starts with a review of the modern portfolio theory framework and offers a hypothesis as to how the demonstrated inability of individuals to stick to a single optimal portfolio might be interpreted. He then goes on to review the behavioral solution of a hypothetical case study and compares the outcome with a traditional optimization. His analysis suggests that, once goal based allocation is re-formulated to allow some focus on the total portfolio trade-off between risk and return, the cost in terms of theoretical sub-optimality may be viewed as trivial. He does however concede that this experiment is unlikely to close the debate between the two branches of finance, as the analysis allows each side to claim some form of victory.
Reproduction at the Margins: Migration and Legitimacy in the New Europe

One of the most compelling demographic questions in contemporary Europe has been whether immigrant populations will bring their youthful age pyramids to help support Europe’s subfertile, aging populations. But how do immigrants envision their own reproductive life trajectories across vast, ambiguous political boundaries whose seismic shifts can threaten their security? This paper reviews some recent literature from demography, anthropology, and the media as well as several case studies to suggest that for immigrant families at the political margins of Europe, especially those from developing countries, the most pressing fertility question is not numbers of children. It is instead the legitimacy that children may provide in their families’ efforts to gain work, social security, and rights to settle. This implies that the reproductive practices adopted by immigrants in Europe may derive less from traditions in their home countries than from efforts to adapt to new rules of “belonging” in Europe. Indeed, what seem very striking in the light of conspicuously low and increasingly non-marital fertility in mainstream Western Europe are the increasing demands placed on immigrants to pursue legitimacy in their reproductive lives. The paper concludes that levels of fertility among immigrants are unlikely to assimilate to the national norms until people’s status becomes more secure. Finally, just as we can no longer rest on conventional notions of reproductive practices in the developing world, it is increasingly impossible to draw general conclusions about fertility in Europe without keeping the developing world in view.
Capacity of Aspartic Acid to Increase the Bacterial Count on Suspensions of Escherichia coli After Freezing

The addition of 2% Trypticase to a minimal salts-glucose plating medium increased the bacterial count of frozen and thawed suspensions of Escherichia coli 451B cells, even when precautions were taken to remove toxic trace elements from the plating diluent. Hydrolysis of the Trypticase with HCl or H2SO4 reduced its count-increasing activity. Treatment of the H2SO4 hydrolysate with a cation-exchange resin greatly improved its capacity to replace Trypticase. Addition of a mixture of amino acids approximating the composition of casein also increased the plate count when added at a level equivalent to 0.1% casein, but at 2% it depressed the count. Tests of amino acids in the mixture revealed that aspartic acid could replace Trypticase completely as a supplement to the basal medium. When added at a level of 2.5 mm, aspartic acid doubled and occasionally tripled the plate count of a suspension of frozen and thawed cells. Glutamic acid, alanine, and to a lesser extent certain other amino acids also showed a capacity to increase the count. Cysteine was without significant effect. Serine and other amino acids depressed the count. None of the amino acids or other supplements affected the count of suspensions of cells that had not been frozen. The effect of adding aspartic acid, cysteine, or Trypticase to the basal medium on the bacterial count of suspensions of various strains of E. coli, Aerobacter aerogenes, Serratia marcescens, and two species of Pseudomonas after freezing was examined. The response to the supplements was unique for each organism.
A Reprise of Size and R & D

Numerous studies have shown that, within industries, the propensity to perform R&D and the amount of R&D conducted by performers are closely related to the size of the firm, while R&D productivity declines with firm size. These findings have been widely interpreted to indicate that there is no advantage to large firm size in conducting R&D. The authors show how a simple model based on the idea of R&D cost spreading can explain the prior findings about the R&D-firm size relationship, as well as additional features of the R&D-firm size relationship, implying an advantage to large size in R&D. Copyright 1996 by Royal Economic Society.
Does online relationship marketing enhance customer retention and cross-buying?

One characteristic of online consumer behavior is the low cost of searching for alternatives. Therefore, customer loyalty is more difficult to achieve in the online context than in the offline one. Although studies have discussed the effectiveness of relationship marketing, nearly all studies examining such constructs have been in the context of ‘offline’ consumer behavior. With regard to the ‘online’ context, the integration of Internet technology with the customer loyalty concept is rarely discussed in the relationship marketing literature. Furthermore, empirical research that integrates the actual purchase behavior of customer retention and cross-buying is relatively sparse. In response to this, the current study develops and empirically tests a model that examines the relations among relationship-bonding tactics, perceived relationship investment, perceived relationship quality, customer loyalty, customer retention, and cross-buying. Using survey data from 766 online customers of a securities corporation, the results demonstrate the effectiveness of relationship marketing as it positively influences online customers' perception, then their loyalty, and ultimately, their actual purchase behavior.
Trading hope : working conditions of sub-Saharan immigrant street traders in Johannesburg and Tshwane

Informal street trading fulfils an important role in South Africa's economy. This article examines the working conditions of informal street traders from Sub-Saharan Africa who trade in the central business districts of Johannesburg and Tshwane. With reference to relevant literature, it identifies their demographic profile, the reasons for their participation in informal trading, a profile of their businesses and the challenges they face. The results indicate that certain differences can be observed between the traders in Johannesburg and Tshwane regarding their operating environment and business profiles, which can be attributed to the stronger economy of Johannesburg. Despite their working conditions, respondents demonstrate endurance and entrepreneurial capabilities by making a living in a foreign economy. Significant policy implications are also discussed.
An EEG study of turning freeze in Parkinson's disease patients: The alteration of brain dynamic on the motor and visual cortex

Freezing of gait is a very debilitating symptom affecting many patients with Parkinson's disease, leading to a reduced mobility and increased risk for falls. Turning is known to be the most provocative trigger for freezing of gait. However, the underlying brain dynamic changes associated with a turning freeze remain unknown. This study therefore used ambulatory EEG to investigate the brain dynamic changes associated with freezing of gait during turning. In addition, this study aimed to determine the most suitable EEG sensor location to detect freezing of gait during turning using our classification system. Data from four Parkinson's disease patients with freezing of gait was analysed using power spectral density and brain effective connectivity, comparing periods of successful turning with freezing of gait during turning. Results showed that freezing of gait during turning is associated with significant alterations in the high beta and theta power spectral densities across the occipital and parietal areas. Furthermore, brain effective connectivity showed that freezing during turning was associated with increased connectivity towards the visual area, which also had the highest accuracy to detect freezing episodes in the O1 regions by using power spectral density in our classification analyses. This is the first study to show cortical dynamic changes associated with freezing of gait during turning, providing valuable information to enhance the performance of future freezing of gait detection systems.
Intact Adipocyte Insulin-Receptor Phosphorylation and In Vitro Tyrosine Kinase Activity in Animal Models of Insulin Resistance

We evaluated the possibility that impaired insulin-receptor kinase activity contributes to insulin resistance by examining in vitro receptor tyrosine kinase activity and in situ receptor phosphorylation in four models of insulin resistance. Adipocytes from streptozocin-induced nonketotic diabetic (STZ-D), glucocorticoid-treated, fasted, and chronically uremic rats showed reduced basal and maximally insulin-stimulated 2-deoxy-d-glucose transport compared with matched controls. Adipocytes from these models were also resistant to stimulation of hexose transport by hydrogen peroxide, a postbinding insulin mimicker. Changes in the number of insulin receptors per cell could not account for these alterations in transport. Cell surface 125I-labeled insulin binding was 142% of control in STZ-D and 129% with fasting and unchanged in glucocorticoid excess and chronic uremia. Insulin-stimulated tyrosine kinase was measured by means of a synthetic substrate, Glu80Tyr20. Partially purified receptors from these resistant models had unaltered kinase activity when normalized to soluble 125I-insulin binding. In situ stimulation of receptor phosphorylation by 7 and 100 nM insulin was determined after equilibration of adipocytes with 32PO4. Compared with matched controls, these intact cells, from all four resistant models, had insulin-stimulated receptor phosphorylation that was unchanged per unit of cell surface binding. Similar to results with insulin, hydrogen peroxide stimulation of in situ receptor phosphorylation was unchanged in each model. Thus, both in vitro and in situ measures of receptor phosphorylation suggest that the cellular alterations leading to insulin resistance in these adipocytes resides beyond phosphorylation of the insulin receptor.
UNVERSITY LECTURERS EXPERIENCE IN THE DESIGN AND USE OF MOODLE AND BLENDED LEARNING ENVIRONMENTS

This study is designed to investigate into how academics (university lecturers) who were involved in the design and development of MOODLE based-courses use the blended learning system to facilitate teaching and learning in the classroom and what factors facilitate or impede the effective design of MOODLE by academics . Qualitative research design was used. Various existing courses of seven lecturers at various faculties of University of Education, Winneba were redesigned with the lecturers and instructional designers in accordance with the specifications of MOODLE learning environment. The lecturers implemented the designed MOODLE learning environment with face-to-teaching to teach students in the real classrooms of the University. The results of the study revealed that academics use MOODLE to prepare and present lessons and chart with students before and after face-to-face lesson in the classroom. The results also revealed that the way academics use MOODLE for assessment reflects their mode of face-face teaching in the classroom. In addition, the finding showed that training program, incentives and motivational packages are necessary for academics to adopt ICT. The major challenges faced as revealed by the results were: 1) low technology competencies, cumbersome institutional culture, and lack of adequate ICT facilities. It is concluded based on the findings that Blended learning systems seems effective and efficient in developing countries (Ghanaian context). However, its development and implementation by the users (academics) present a number of challenges that need to be addressed in order to achieve its full potentials to promote the development of the 21st century competencies
Myofibrillar Protein Breakdown in Skeletal Muscle is Diminished in Rats With Chronic Streptozocin-Induced Diabetes

Previous reports have suggested that insulin may not regulate the breakdown of myofibrillar proteins in skeletal muscle. To further test the role of insulin, insulinopenia was produced by treating rats with streptozocin. After treatment, protein breakdown in skeletal muscle was evaluated with the isolated prefused rat hindquarter preparation. After the inhibition of protein synthesis with cycloheximide, total and myofibrillar protein breakdown were assessed by measuring the release of tyrosine and 3-methylhistidine, respectively, in the perfused hindquarters of diabetic and agematched control rats. Streptozocin-induced (65 mg/kg) diabetes (3- to 28-day duration) resulted in hyperglycemia, hypoinsulinemia, hyperphagia, increased plasma lipid levels, arrested body and muscle growth, and increased urea and 3-methylhistidine excretion. Despite this, protein breakdown in skeletal muscle diminished. The release of 3-methylhistidine by the perfused hindquarters of diabetic rats decreased, whereas the release of tyrosine remained unchanged, suggesting that the breakdown of myofibrillar proteins was affected specifically. 3-Methylhistidine (unbound) levels in skeletal muscle of unperfused diabetic rats as well as in skin decreased, whereas they increased twofold in the gastrointestinal tract. More severe diabetes (125 mg/kg streptozocin), which resulted in ketoacidosis, augmented protein breakdown in muscle; however, this response was due to a marked fall in food consumption (it was also evident when control rats were pair fed). These data reinforce previous conclusions that insulin does not play a major role in the regulation of myofibrillar protein breakdown in skeletal muscle. They also suggest that food consumption per se and/ or lipid availability may modulate myofibrillar proteolysis independent of insulin secretion. Lastly, increased 3-methylhistidine excretion in diabetic rats appeared to be of gastrointestinal origin. Because of this, caution must still be exercised in the use of 3-methylhistidine excretion as an index of myofibrillar proteolysis in skeletal muscle.
Regulation by Orexin of Feeding Behaviour and Locomotor Activity in the Goldfish

Orexin is a hypothalamic neuropeptide that is implicated in the regulation of feeding behaviour and the sleep‐wakefulness cycle in mammals. However, in spite of a growing body of knowledge concerning orexin in mammals, the orexin system and its function have not been well studied in lower vertebrates. In the present study, we first examined the effect of feeding status on the orexin‐like immunoreactivity (orexin‐LI) and the expression of orexin mRNA in the goldfish brain. The number of cells showing orexin‐LI in the hypothalamus of goldfish brain showed a significant increase in fasted fish and a significant decrease in glucose‐injected fish. The expression level of orexin mRNA in the brains of fasted fish increased compared to that of fed fish. We also examined the effect of an i.c. v. injection of orexin or an anti‐orexin serum on food intake and locomotor activity in the goldfish. Administration of orexin by i.c. v. injection induced a significant increase of food intake and locomotor activity, whereas i.p. injection of glucose or i.c. v. injection of anti‐orexin serum decreased food consumption. These results indicate that the orexin functions as an orexigenic factor in the goldfish brain.
Energy utilization in pigs selected for high and low residual feed intake.

Genetic selection on residual feed intake (RFI) can be used as an alternative method to G:F to improve feed efficiency in pigs. The objective of this study was to determine the effects of selection for RFI on digestive and metabolic utilization of energy in 2 lines of purebred French Large White castrated male pigs obtained from a divergent selection experiment over 6 generations. The RFI(+) (high RFI) line consumed more feed than predicted from performance compared with the RFI(-) (low RFI) line. Digestibility of energy and nutrients, total heat production (HP), HP related to physical activity, and energy and N balance were measured in respiration chambers for a 6-d period in pigs offered feed ad libitum. Pigs remained in the chamber for an additional day and did not receive any feed to estimate the fasting HP and calculate the thermic effect of feeding. Five pairs of 2 littermates from the same farrowing batch were used in each line. Because 2 respiration chambers were available for the trial, pigs were measured regularly during the 25- to 95-kg growing period. Two pigs per chamber were used until pigs reached 45 kg of BW, and 1 pig per chamber was used thereafter. Individual feed intake and BW gain were measured continuously from weaning to the end of the trial. Pigs were fed 3 diets with decreasing CP contents during the 25 to 45 (period 1), 45 to 65 (period 2), and 65 to 95 (period 3) kg of BW periods. Average daily feed intake was greater in RFI(+) pigs than in RFI(-) pigs between 25 and 65 kg of BW (2,128 vs. 1,891 g/d; P < 0.01) and G:F was 8% greater in RFI(-) pigs compared with RFI(+) pigs (P < 0.01). There was no line effect on digestibility coefficients or N retention, irrespective of the experimental period studied. Nitrogen retention was 31.2, 28.7, and 20.8 g/d at periods 1, 2, and 3, respectively (P < 0.001). The HP was greater in RFI(+) pigs than in RFI(-) pigs (1,497 vs. 1,383 kJ.kg of BW(-0.60). d(-1); P < 0.01), with no subsequent line effect on energy retention. The activity-related HP tended to be greater in RFI(+) pigs than in RFI(-) pigs (250 vs. 218 kJ.kg of BW(-0.60). d(-1); P = 0.09), and the fasting HP was 10% greater (P = 0.04) in RFI(+) pigs than in RFI(-) pigs (846 vs. 771 kJ.kg of BW(-0.60). d(-1)). The thermic effect of feeding, expressed as a percentage of ME intake, was the same for both lines of pigs (average, 14.7%). In conclusion, the RFI(+) pigs are energetically less efficient because of their greater HP related to physical activity and basal metabolic rate.
Industry‐Specific Capital and the Wage Profile: Evidence from the National Longitudinal Survey of Youth and the Panel Study of Income Dynamics

Using data from the National Longitudinal Survey of Youth (1979–96) and the Panel Study of Income Dynamics (1981–91), I seek to determine whether there is any net positive return to tenure with the current employer once we control for industry‐specific capital. Including total experience in the industry as an additional explanatory variable, I show that the return to seniority is markedly reduced using GLS while it virtually disappears using IV-GLS, at both the one‐digit and three‐digit levels. Therefore, it seems that what matters most for the wage profile in terms of human capital is industry‐specificity, not firm‐specificity.
The Absence of the African‐American Owned Business: An Analysis of the Dynamics of Self‐Employment

Estimates from the Panel Study of Income Dynamics indicate that African‐American men are one‐third as likely to be self‐employed as white men. The large discrepancy is due to a black transition rate into self‐employment that is approximately one‐half the white rate and a black transition rate out of self‐employment that is twice the white rate. Using a new variation of the Blinder‐Oaxaca decomposition technique, I find that racial differences in asset levels and probabilities of having self‐employed fathers explain a large part of the gap in the entry rate, but almost none of the gap in the exit rate.
Expertise with unfamiliar objects is flexible to changes in task but not changes in class

Perceptual expertise is notoriously specific and bound by familiarity; generalizing to novel or unfamiliar images, objects, identities, and categories often comes at some cost to performance. In forensic and security settings, however, examiners are faced with the task of discriminating unfamiliar images of unfamiliar objects within their general domain of expertise (e.g., fingerprints, faces, or firearms). The job of a fingerprint expert, for instance, is to decide whether two unfamiliar fingerprint images were left by the same unfamiliar finger (e.g., Smith’s left thumb), or two different unfamiliar fingers (e.g., Smith and Jones’s left thumb). Little is known about the limits of this kind of perceptual expertise. Here, we examine fingerprint experts’ and novices’ ability to distinguish fingerprints compared to inverted faces in two different tasks. Inverted face images serve as an ideal comparison because they vary naturally between and within identities, as do fingerprints, and people tend to be less accurate or more novice-like at distinguishing faces when they are presented in an inverted or unfamiliar orientation. In Experiment 1, fingerprint experts outperformed novices in locating categorical fingerprint outliers (i.e., a loop pattern in an array of whorls), but not inverted face outliers (i.e., an inverted male face in an array of inverted female faces). In Experiment 2, fingerprint experts were more accurate than novices at discriminating matching and mismatching fingerprints that were presented very briefly, but not so for inverted faces. Our data show that perceptual expertise with fingerprints can be flexible to changing task demands, but there can also be abrupt limits: fingerprint expertise did not generalize to an unfamiliar class of stimuli. We interpret these findings as evidence that perceptual expertise with unfamiliar objects is highly constrained by one’s experience.
High Road, Low Road, or Off Road? Economic Development Strategies in the American States

Observers of state economic development policy in the United States have identified two conceptually distinct approaches, often termed industrial recruitment and entrepreneurial policies, and debated the extent to which a “third wave” of policy emergent during the 1990s represents a conceptually distinct approach to economic development. Data limitations and conceptual confusion have hindered efforts to distinguish state economic development strategies and to update existing typologies to reflect contemporary practices. This article uses data from the Council for Community and Economic Research’s Expenditures Database in 2007 to evaluate the extent to which the states follow conceptually distinctive economic development strategies. We find that the states’ economic development expenditures reflect a high degree of conceptual hybridity rather than strict adherence to supply-side industrial recruitment or demand-side entrepreneurial development.