Miracle-dz/UniFAR-FTUs huggingface dataset:
Enhanced WirelessTransmitters using an inter-stage notch filter

This paper proposes a new technique in suppressing nonlinear distortion in nonlinear wireless transmitters. Several interfering signals with high power levels can cause unwanted nonlinear distortion of the poweramplifiers. A simple cascade system of a notch filter and the power amplifier is presented which potentially suppresses the interfering signals and also minimises third order intermodulation products. The proposed method is simulated in Agilent ADS using a commercial nonlinear class-ABbasestationpower amplifier model. A two tone test was carried out at 761 MHz and 763 MHz. The simulated results show an suppression of distortion by about 8 dB. The proposed technique is experimentally verified for a QPSK signal in the presence of a single interfering tone, where distortion suppression of around 10 dB have been measured.
Worker Replacement

We consider a frictional labor market in which firms want to insure their senior employees against income fluctuations and, at the same time, want to recruit new employees to fill their vacant positions. Firms can commit to a wage schedule, i.e. a schedule that specifies the wage paid by the firm to its employees as function of their tenure and other observables. However, firms cannot commit to the employment relationship with any of their workers, i.e. firms can dismiss workers at will. We find that, because of the firm's limited commitment, the optimal schedule prescribes not only a rigid wage for senior employees, but also a downward rigid wage for new hires. Moreover, we find that, while the rigidity of the wage of senior workers does not affect the allocation of labor, the rigidity of the wage of new hires magnifies the response of unemployment and vacancies to negative shocks to the aggregate productivity of labor.
System level synthesis of hardware for DSP applications using pre-characterized function implementations

SYLVA is a system level synthesis framework that transforms DSP sub-systems modeled as synchronous data flow into hardware implementations in ASIC, FPGAs or CGRAs. SYLVA synthesizes in terms of pre-characterized function implementations (FTMPs). It explores the design space in three dimensions, number of FTMPs, type of FTMPs and pipeline parallelism between the producing and consuming FTMPs. We introduce timing and interface model of FTMPs to enable reuse and automatic generation of Global Interconnect and Control (GLIC) to glue the FTMPs together into a working system. SYLVA has been evaluated by applying it to five realistic DSP applications and results analyzed for design space exploration, efficacy in generating GLIC by comparing to manually generated GLIC and accuracy of design space exploration by comparing the area and energy costs considered during the design space exploration based on pre-characterized FIMPs and the final results.
City, University of London Institutional Repository City Research Online Effects of incorrect CAD output on human decision making in mammography Effects of incorrect CAD output on human decision making in mammography

RATIONALE AND OBJECTIVES Our goal was to investigate the effects of incorrect computer output on the reliability of the decisions of human users. Our work followed on an independent UK clinical trial that evaluated the impact of CAD in breast screening. Our aim was to use data from this trial to feed into probabilistic models (similar to those used in “reliability engineering”) which would allow us to find and assess possible ways of improving the human-CAD interaction. Some of our analyses required extra data and we conducted two supplementary studies. Study 1 was designed to elucidate the effects of computer failure on human performance. Study 2 was conducted to clarify unexpected findings from Study 1.
Simulation Model for Dengue Infection

A model of viral infection of monocytes populatio n by dengue virus is formulated here. The model takes into account the immune response and also the haematocrit. The dynamic of haematocrit effect for dengue infection is presenti ng by the function that concerning the contact between free-v irus and immune response. We also simulate the model base on dengue patient data from Hasan Sadikin Hospital Bandung. From some numerical simulations it is concluded that the firs t model simulation can capture the phenomena the rise of haematocrit level for dengue infection patient. The second mode l simulate that the density of thrombocyte decrease during the dengue infection process found in the dengue patient data. engue is among dangerous vector-borne disease found mainly in tropical countries. It may lead to fatality in some cases, especially when it infects people for the second time- known as a secondary in fection. The disease is caused by one of four known strains of flavivirus, namely DEN-1, DEN-2, DEN-3, and DEN-4. There are three stages of of severity on an infected huma n : Dengue Fever comes with headaches, bone or joint muscular pains, rash and leukopeni as symptoms, Dengue Haemorrhagic Fever (DHF) is characterized by four mayor clinica l manifestations: high fever, haemorrhagic phenomena, often with hepatomegaly and in severe cases, signs of cir culatory failure and blood discharge from the vessel and suc h patients may develop hypovolaemic shock resulting from plasma leakage. This is called dengue shock syndrome (DSS) and can be fatal (12). Two main pathophysiological changes occur in DHF/DSS. One is an increased vascular permeability that gives rise to loss of plasma from vascular compartm ent. This result in haemoconcentration, low pulse pressure an d other signs of shock, if plasma loss becomes critical. Th e second change is disorder in haemostasis involving vascula r changes, thrombocytopenia and coagulopathy (12). The laboratory findings that thrombocytopenia and haemoconcentration are constant findings in DHF.
Evidence for Horizontal Gene Transfer in Evolution of Elongation Factor Tu in Enterococci

ABSTRACT The elongation factor Tu, encoded by tuf genes, is a GTP binding protein that plays a central role in protein synthesis. One to three tuf genes per genome are present, depending on the bacterial species. Most low-G+C-content gram-positive bacteria carry only one tuf gene. We have designed degenerate PCR primers derived from consensus sequences of the tuf gene to amplify partial tuf sequences from 17 enterococcal species and other phylogenetically related species. The amplified DNA fragments were sequenced either by direct sequencing or by sequencing cloned inserts containing putative amplicons. Two different tufgenes (tufA and tufB) were found in 11 enterococcal species, including Enterococcus avium,Enterococcus casseliflavus, Enterococcus dispar, Enterococcus durans, Enterococcus faecium, Enterococcus gallinarum, Enterococcus hirae, Enterococcus malodoratus, Enterococcus mundtii, Enterococcus pseudoavium, andEnterococcus raffinosus. For the other six enterococcal species (Enterococcus cecorum, Enterococcus columbae, Enterococcus faecalis, Enterococcus sulfureus, Enterococcus saccharolyticus, andEnterococcus solitarius), only the tufA gene was present. Based on 16S rRNA gene sequence analysis, the 11 species having two tuf genes all have a common ancestor, while the six species having only one copy diverged from the enterococcal lineage before that common ancestor. The presence of one or two copies of thetuf gene in enterococci was confirmed by Southern hybridization. Phylogenetic analysis of tuf sequences demonstrated that the enterococcal tufA gene branches with the Bacillus, Listeria, andStaphylococcus genera, while the enterococcaltufB gene clusters with the generaStreptococcus and Lactococcus. Primary structure analysis showed that four amino acid residues encoded within the sequenced regions are conserved and unique to the enterococcaltufB genes and the tuf genes of streptococci and Lactococcus lactis. The data suggest that an ancestral streptococcus or a streptococcus-related species may have horizontally transferred a tuf gene to the common ancestor of the 11 enterococcal species which now carry two tuf genes.
Topography and connections of the telencephalon in a chondrostean, Acipenser baeri: An experimental study

Sturgeons belong to an ancient group of the extant actinopterygian fishes. Accordingly, the study of their brain connections is important to understand brain evolution in the line leading to teleosts. We examined the topography and connections of the various telencephalic regions of the Siberian sturgeon (Acipenser baeri). The telencephalic regions were characterized on the basis of acetylcholinesterase histochemistry and calbindin‐D28k and calretinin immunohistochemistry. The telencephalic connections were investigated by using the fluorescent dye DiI (1,1′‐dioctadecyl 3,3,3′,3′‐tetramethylindocarbocyanine perchlorate) in fixed brains. Application of DiI to different areas of the pallial (dorsal) regions of the telencephalic lobes showed that they have mostly intratelencephalic connections. A posterior pallial region is characterized by its similar hodology to that of the posterior zone of the teleosts dorsal telencephalon and those described in other ancient groups. Extratelencephalic connections of the pallium are scarce, although a few afferent and efferent connections with the diencephalon, mesencephalon, and rostral rhombencephalon were observed. DiI application to subpallial regions showed both intratelencephalic connections and connections with different brain regions. Afferents to the subpallium originate from the olfactory bulbs, preoptic area, thalamus, posterior tuberculum, hypothalamus, secondary gustatory nucleus, and raphe nuclei. Some of these connections are quite similar to those described for other vertebrates. J. Comp. Neurol. 497:519–541, 2006. © 2006 Wiley‐Liss, Inc.
Uyghur transnational identity on Facebook: on the development of a young diaspora

How are online and social media being used in transnational spaces? This article presents empirical findings from a study of the Facebook usage among the Uyghur diaspora. We demonstrate how online identities are negotiated and developed through social media use, and in turn how the expression of identity online is contributing to Uyghur diasporic identity. Drawing upon a content analysis of Facebook sites, we attend to the construction of Uyghur ethnic identity within Facebook group sites and the ways Uyghur political identity is currently being developed online, providing insight into how Facebook is serving as a space for global, daily online interactions. The examination of discussions on Facebook sites indicates that online Uyghur identity has a youthful, emergent character, actively being explored and produced through social media use.
Comparative histomorphology of intrinsic vibrissa musculature among primates: implications for the evolution of sensory ecology and "face touch".

Macrovibrissae are specialized tactile sensory hairs present in most mammalian orders, used in maxillary mechanoreception or "face touch. " Some mammals have highly organized vibrissae and are able to "whisk" them. Movement of vibrissae is influenced by intrinsic vibrissa musculature, striated muscle bands that attach directly to the vibrissa capsule. It is unclear if primates have organized vibrissae or intrinsic vibrissa musculature and it is uncertain if they can move their vibrissae. The present study used histomorphological techniques to compare vibrissae among 19 primates and seven non-primate mammalian taxa. Upper lips of these mammals were sectioned and processed for histochemical analysis. While controlling for phylogenetic effects the following hypotheses were tested: 1) mammals with well-organized vibrissae possess intrinsic vibrissa musculature and 2) intrinsic vibrissa musculature is best developed in nocturnal, arboreal taxa. Our qualitative analyses show that only arboreal, nocturnal prosimians possess intrinsic musculature. Not all taxa that possessed organized vibrissae had intrinsic vibrissa musculature. Phylogenetic comparative analyses revealed a 70% probability that stem mammals, primates, and haplorhines possessed intrinsic vibrissa musculature and well-organized vibrissae. These two traits most likely coevolved according to a discrete phylogenetic analysis. These results indicate that nocturnal, arboreal primates have the potential to more actively use their vibrissae in spatial recognition and navigation tasks than diurnal, more terrestrial species, but there is a clear phylogenetic signal involved in the evolution of primate vibrissae and "face touch. "
Relational Embeddedness and Learning: The Case of Bank Loan Managers and Their Clients

As a complement to the literature on learning in firms, we investigate learning in markets, a nascent area of study that focuses on how learning occurs between, rather than within, firms. The core idea behind our framework is that networks shape knowledge transfer and learning processes by creating channels for knowledge trade and reducing the risk of learning. In developing our framework, we elaborate on the knowledge transfer capabilities of different types of social ties, the informational properties of public and private knowledge, and how types of knowledge transfer and forms of learning follow from the networks within which firms embed their exchanges. We conducted fieldwork at Chicago-area banks to examine our framework's plausibility and application to learning in financial lending markets, a setting relevant to most firms. Findings indicate that learning is located not only in actors' cognitions or past experiences, but also in relations among actors, and that viewing learning as a social process helps solve problems regarding knowledge transfer and learning in markets.
Language development of pre‐school children born to teenage mothers

An Erratum has been published for this article in Infant and Child Development 10(4) 2001, 241. This paper compares the language development of pre-school children born to teenage (n=22) and comparison mothers (n=20) and examines the extent to which differences in language development can be explained by social background, child and parenting factors. Mothers and children were assessed at home using a range of measures, including a structured interview, the language scales of the Child Development Inventory, the HOME Inventory, and videotaped mother-child interaction. Results showed that children of teenage mothers perform significantly poorer than children of comparison mothers on measures of expressive language and language comprehension. Subsequent analyses showed that these differences are largely explained by differences in the parenting behaviour of teenage and comparison mothers. Specifically, maternal verbal stimulation and intrusiveness accounted for the relationship between teenage motherhood and children's poorer language comprehension, while maternal intrusiveness and involvement with the child account for the relationship between teenage motherhood and children's poorer expressive language development. These findings highlight the importance of early mother–child interaction for children's language development. Copyright © 2001 John Wiley & Sons, Ltd.
Automated detection of fundus photographic red lesions in diabetic retinopathy.

PURPOSE To compare a fundus image-analysis algorithm for automated detection of hemorrhages and microaneurysms with visual detection of retinopathy in patients with diabetes. METHODS Four hundred fundus photographs (35-mm color transparencies) were obtained in 200 eyes of 100 patients with diabetes who were randomly selected from the Welsh Community Diabetic Retinopathy Study. A gold standard reference was defined by classifying each patient as having or not having diabetic retinopathy based on overall visual grading of the digitized transparencies. A single-lesion visual grading was made independently, comprising meticulous outlining of all single lesions in all photographs and used to develop the automated red lesion detection system. A comparison of visual and automated single-lesion detection in replicating the overall visual grading was then performed. RESULTS Automated red lesion detection demonstrated a specificity of 71.4% and a resulting sensitivity of 96.7% in detecting diabetic retinopathy when applied at a tentative threshold setting for use in diabetic retinopathy screening. The accuracy of 79% could be raised to 85% by adjustment of a single user-supplied parameter determining the balance between the screening priorities, for which a considerable range of options was demonstrated by the receiver-operating characteristic (area under the curve 90.3%). The agreement of automated lesion detection with overall visual grading (0.659) was comparable to the mean agreement of six ophthalmologists (0.648). CONCLUSIONS Detection of diabetic retinopathy by automated detection of single fundus lesions can be achieved with a performance comparable to that of experienced ophthalmologists. The results warrant further investigation of automated fundus image analysis as a tool for diabetic retinopathy screening.
Word Sense Disambiguation: A Unified Evaluation Framework and Empirical Comparison

Word Sense Disambiguation is a long-standing task in Natural Language Processing, lying at the core of human language understanding. However, the evaluation of automatic systems has been problematic, mainly due to the lack of a reliable evaluation framework. In this paper we develop a unified evaluation framework and analyze the performance of various Word Sense Disambiguation systems in a fair setup. The results show that supervised systems clearly outperform knowledge-based models. Among the supervised systems, a linear classifier trained on conventional local features still proves to be a hard baseline to beat. Nonetheless, recent approaches exploiting neural networks on unlabeled corpora achieve promising results, surpassing this hard baseline in most test sets.
Outcomes of Severe to Profound Idiopathic Sudden Sensorineural Hearing Loss

Objectives While a severe to profound sudden sensorineural hearing loss (SSNHL) may cause serious disability in verbal communication, there have been little studies focusing on this high degree SSNHL. The present study was aimed to investigate the characteristics of hearing recovery in a high degree SSNHL (>70 dB). Methods Three hundred and two SSNHL patients were enrolled. For a long-term follow-up, 46 patients were evaluated. Hearing level was examined by pure tone audiometry on day 1, week 3, month 3, month 6, and year 1 or after. According to the degree of the initial hearing loss, the patients were divided into 4 groups from 70 to ≥100 dB. Results After 3 weeks, the recovery rate and mean hearing gain was 61%, 23.85 dB in the 70 dB group, whereas 10%, 6.61 dB in the ≥100 dB group. There was a significant correlation between 3-week recovery and final hearing outcome. However, there was almost no recovery after 3 months. Conclusion An early recovery can be a prognostic factor for the final recovery in severe to profound SSNHL. Since recovery after 3 months is rare, an early hearing intervention like hearing aid or cochlear implantation should be considered in the high degree SSNHL to restore the patient's verbal communication.
Rapid, detail-preserving image downscaling

Image downscaling is arguably the most frequently used image processing tool. We present an algorithm based on convolutional filters where input pixels contribute more to the output image the more their color deviates from their local neighborhood, which preserves visually important details. In a user study we verify that users prefer our results over related work. Our efficient GPU implementation works in real-time when downscaling images from 24 M to 70 k pixels. Further, we demonstrate empirically that our method can be successfully applied to videos.
Resonant scattering in the Perseus Cluster: spectral model for constraining gas motions with Astro-H

X-ray spectra from cores of galaxy clusters can be strongly distorted by resonant scattering of line photons, aecting metal abundance and gas velocity measurements. We introduce simulated spectral models that take into account the resonant scattering eect, radial variations of thermodynamic properties of the hot gas, projection eects and small-scale isotropic gas motions. The key feature of the models is that all these eects are treated self-consistently for the whole spectrum, rather than for individual lines. The model spectra are publicly available and can be used for direct comparison with observed projected spectra. Comparison with the existing XMM-Newton and Chandra data of the Perseus Cluster shows that even though there is no strong evidence for the resonant scattering in Perseus, the low energy resolution of the X-ray CCDs is not sucient to robustly distinguish spectral distortions due to the resonant scattering, dierent metal abundance proles and dierent levels of gas turbulence. Future AstroH data will resolve most of the problems we are facing with CCDs. With the help of our models, the resonant scattering analysis can be done self-consistently using the whole spectral information, constraining the level of gas turbulence already with a 100 ks observation with Astro-H.
Deception, Individual Differences and Penalty Kicks: Implications for Goalkeeping in Association Football

The purpose of the current article is to review findings from the visual anticipation literature with a particular focus on penalty kick goalkeeping in Association football. We give a brief introduction to the area of research before providing reviews of two recent studies. First, we focus on the applied implications of a study that examined the effect of deception and non-deception penalty kick strategies on goalkeeping performance. Second, we consider further limiting factors on the accuracy of goalkeeper visual anticipation through examination of the relationship between goalkeeper action capabilities and the timing and accuracy of goalkeeper responses. Finally, the implications of the results are considered with recommendations for coaching practices aimed at improving visual anticipation skills.
Reviewing Research on Teaching Writing Based on Vygotsky's Theories: What We Can Learn

This review focuses on the development of writing research informed by a Vygotskian perspective. A methodological environment to aid the instruction of writing is presented. The review reveals the need to conduct research in developing students' inner voice, to lower the cognitive drain created during writing, and to understand how helpful the understanding of cognitive deficiencies is for teachers.
Task knowledge overlap and knowledge variety: the role of advice network structures and impact on group effectiveness

Drawing from the structural perspective of social capital theory, this research investigates how internal and external advice network structures influence knowledge overlap and variety and, how these knowledge dimensions in turn influence group effectiveness. Findings from two studies on knowledge-intensive groups indicate that different advice network structures are associated with knowledge overlap and knowledge variety, and only knowledge variety was significantly associated with group effectiveness. In addition, despite implicit understanding that advice networks aid performance through enhancing knowledge outcomes, only knowledge variety was found to mediate the relationship between external network and group effectiveness. Implications for theory and practice are discussed. Copyright © 2007 John Wiley & Sons, Ltd.