Miracle-dz/UniFAR-FTUs huggingface dataset:
MIMO Transmission with Limited Feedback

During the past decade, multiple-antenna transmission (MIMO) systems have matured. However, when comparing their potential capacities with their achieved through-puts, we notice large gaps. The price for the MIMO advantages is increased cost for the transceiver hardware and antenna subsystems, combined with high algorithmic complexity in baseband processing and protocols. For instance, water filling and power loading do not seem feasible due to the large amount of required channel state information. State-of-the-art systems with MIMO enhancements like 3G cellular networks, WiMax, and WLAN support very limited feedback only. Nevertheless, adaptive modulation and coding (AMC) schemes, selective space-time coding, as well as antenna selection have shown that significant improvements are achievable even with very limited feedback. In this setting , MIMO-OFDM schemes are of central interest to industry and academia. For instance, an important challenge is to find an adequate representation of the MIMO channel's quality—independently of the system architecture and signal processing techniques currently available. A proper labeling or characterization of the MIMO channel quality regardless of the spatial processing to be used enables deciding on the reception or transmission strategy to use (e.g., with or without channel state information, to optimize diversity or rate, etc.) and, thus, on the amount of feedback that is required in transmission. MIMO transmission can be point-to-point or distributed; in fact, when looking not just into the physical layer, but also into the link layer, feedback load is especially critical in multiuser MIMO systems because of its much higher number of degrees of freedom. Opportunis-tic scheduling strategies have been developed, which (more or less heuristically) take into account the requirements on QoS. This special issue focuses on such transmission systems with limited feedback and provides an overview of the state of the art. We received 23 submissions, out of which we finally selected eleven for this special issue. The paper entitled " Antenna subset selection for cyclic prefix-assisted MIMO wireless communications over frequency selective channels " by A. Wilzeck and T. Kaiser is a tutorial paper on antenna selection techniques in broadband transmissions. In broadband MIMO systems aiming to provide high data rate links, the employed signal bandwidth is typically larger than the coherence bandwidth of the channel , so that the channel will be of frequency selective nature. While most contributions in literature consider only the frequency flat case, this paper shows how MIMO orthogonal frequency division multiplexing systems and MIMO single-carrier systems …
Intrinsic evolvable hardware implementation of a robust biological development model for digital systems

An intrinsic evolvable hardware platform was realized to accelerate the evolutionary search process of a biologically inspired developmental model targeted at off-shelf FPGA implementation. The model has the capability of exhibiting very large transient fault-tolerance. The evolved circuits make up a digital "organism" from identical cells which only differ in internal states. Organisms implementing a 2-bit multiplier were evolved that can "recover" from almost any kinds of transient faults. This paper focuses on the design concerns and details of the evolvable hardware system, including the digital organism/cell and the intrinsic FPGA-based evolvable hardware platform.
Vignette for PANR : Posterior association network and enriched functional gene modules inferred from rich phenotypes of gene perturbations

3 Methods 5 3.1 Quantifying the significance of gene associations . 5 3.1. 1 Measuring gene associations . 5 3.1. 2 Bayesian mixture modelling . 5 3.2 Posterior association networks . 10 3.2. 1 Representation . 10 3.2. 2 Inference . 10
Research on robust salient object extraction in image

Object extraction is an essential branch of the computer vision, concerned with the analysis of images to extract useful information from the world. It covers wide range of image processing fields and plays an important role in computer vision. In this dissertation, contour detection is mainly discussed to realize object extraction, realized in three steps: edge detection, contour segment detection and object contour detection. In addition, an application of robust salient contour detection to 3D building reconstruction in aerial image is also discussed. Due to the complex scene of the natural image, it is necessary for us to develop robust contour detection methods against the noise and texture. And the computing complexity of the robust methods should also be considered. For the problem of salient edge detection, a multi-scale transition region based edge detector is proposed. According to existence of the " transition region " in natural image, a novel gradient computing method based on the transition region is designed. The central pixels of the transition region are prominent with low gradient magnitude while their neighborhood pixels are with high gradient magnitude. Through the multi-scale analysis by a series of the windows with variable sizes, we can detect the real edge pixels based on the relatively stable gradient distribution pattern of the transition region across the scales. Experimental results show that the proposed method performs better than Canny edge detector and an eigen-analysis based color edge detector with more connected edges. For the problem of salient contour segment detection, a scale invariance based line detector is proposed. A refined Nevatia-Babu line operator is firstly proposed based on the consecutive property of edge pixels on a line with simpler computing. Then a scale invariance based line detector is proposed based on the scale invariance property of the salient line segments on the object contour. According to the experimental results, the proposed method has almost no redundancy of the detected line segments compared with high redundancy level of the Progressive Probabilistic Hough Transform (PPHT) method-2-on the same experimental images. The proposed method also works more efficiently than PPHT methods, especially when the image includes many line segments. For the problem of salient object contour detection, a Constrained Delaunay Triangulation (CDT) graph based contour detection method is proposed. A structure called the Constrained Delaunay Triangulation (CDT) graph is introduced in order to enormously reduce the computing complexity. All the CDT edges are classified …
Liver Iron Concentration in Patients Referred to a Secondary Hospital for Hyperferritinemia: Analysis of the Different Groups According to HFE Mutations and the Transferrin Saturation Index

Background: Olynyketal. studiedtheliverironconcentration(LIC)byMRIof 52consecutivepatientsof northernEuropeanorigin who were referred to a tertiary hospital for hyperferritinemia (HF). They described three groups according to HFE mutations and thetransferrinsaturationindex(TSI)(groupA:nopredisposingmutations(PM)forhereditaryhemochromatosis(HH)andTSI> 45 %, group B: PM for HH and TSI > 45 %; group C: no PM for HH and normal TSI). In the Basque country, HH predisposing mutations diﬀer, with prevalence of the H63D/H63D mutation. Objectives: Tostudytheimportanceof HFEmutationsandtheTSIindeterminingLICof HFpatientsattendingtheoutpatientclinic at a secondary hospital. Methods: Prospective study of 132 consecutive patients with HF. In 120 HFE study was available. In 79 LIC was obtained by MRI. In 71 patients values of HFE mutations, TSI, and LIC by MRI were available. Results: Mean age: 55.68 ± 14.26 (23 - 83), 55 men and 16 women. The mean LIC in men was 35.66 ± 36.85; women 38.81 ± 29.75. The meanLICingroupA:38.80 ± 45.18(5-210),groupB:48.96 ± 37.51(15-160),groupC:28.12 ± 18.85(5-75). WecomparedtheLICmean values of the 3 groups with no signiﬁcant diﬀerences. Conclusions: LIC values are similar in diﬀerent groups of patients referred to a secondary hospital for HF, despite variable predis-position to HH.
Olfactory stimuli associated with the different stages of vertebrate decomposition and their role in the attraction of the blowfly Calliphora vomitoria (Diptera: Calliphoridae) to carcasses

Research was undertaken to explore the succession of insects on a decomposing body and to identify the semiochemicals responsible in initially attracting blowflies, specifically Calliphora vomitoria, to the body. Five adult pigs were used for studies of insect succession and decomposition. Different species of insects are attracted to a decomposing body at different stages of decomposition. This was evident throughout all the experiments with blowflies C. vicina and C. vomitoria being the first to arrive on the experimental pigs and colonise the body. Muscidae and Lucilia sp. closely followed. Silphidae and Staphylinidae beetles, adults and immature stages, were present early during decomposition; however, during the last stage of decomposition Cleridae, Histeridae, and Dermestidae beetles were much more numerous. Warmer temperatures presented increased insect activity and rate of tissue removal, while rain triggered a mass larval migration from the body. Maggot masses greatly elevated the temperature inside a corpse. While the presence of adults of a single species on the body could not alone be used to identify a specific point in insect . succession, their presence with a particular combination of other insect species, their abundance, and that of their offspring all helped define a succession pattern. Combined gas chromatography (GC) and electroantennogram (EAG) experiments identified four volatile chemicals recovered from the decomposing pigs which elicited a receptor response from C. vomitoria: dimethyl disulfide, dimethyl trisulfide, dimethyl tetrasulfide, and a compound of unknown structure (KI 881-885). Dose response experiments demonstrated that dimethyl trisulfide and dimethyl tetrasulfide elicited the greatest receptor responses. A positive correlation was found between the concentration of these compounds and the number of flies on the pig carcass. The chemical composition and concentration of the compounds associated with decay, in particular the EAG-active compounds, varied between the different stages of decomposition. None of the EAGactive compounds caught a significantly greater number of blowflies than unbaited traps when water trap and sticky trap experiments were conducted. The positive control, a mixture of sodium sulfide and liver, also failed to capture significantly more blowflies than the controls. While fewer than expected blowflies were captured during these experiments, a greater insight into suitable trapping methods and bait composition was
Finding Triangles or Independent Sets; and Other Dual Pair Approximations

We revisit the algorithmic problem of finding a triangle in a graph (\textsc{Triangle Detection}), and examine its relation to other problems such as \textsc{3Sum}, \textsc{Independent Set}, and \textsc{Graph Coloring}. We obtain several new algorithms: \smallskip (I) A simple randomized algorithm for finding a triangle in a graph. As an application, we study the range of a conjecture of P\v{a}tra\c{s}cu (2010) regarding the triangle detection problem. \smallskip (II) An algorithm which given a graph $G=(V,E)$ performs one of the following tasks in $O(m+n)$ (ie, linear) time: (i)~compute a $\Omega(1/\sqrt{n})$-approximation of a maximum independent set in $G$ or (ii)~find a triangle in $G$. The run-time is faster than that for any previous method for each of these tasks. \smallskip (III) An algorithm which given a graph $G=(V,E)$ performs one of the following tasks in $O(m+n^{3/2})$ time: (i)~compute an $\sqrt{n}$-approximation for \textsc{Graph Coloring} of $G$ or (ii)~find a triangle in $G$. The run-time is faster than that for any previous method for each of these tasks on dense graphs, with $m =\omega(n^{9/8})$. \smallskip (IV) The second and third results suggest the following broader research direction: if it is difficult to find (A) or (B) separately, can one find one of the two efficiently? This motivates the \emph{dual pair} concept we introduce. We discuss and provide several instances of dual-pair approximation.
Remap-Based Inter-Partition Copy for Arrayed Solid-State Drives

The internal copy (IC) is a simple, yet powerful in-storage processing function, which changes the locations of data blocks without invoking any data transfer between the host and storage. Owing to the out-of-place update constraint of flash memory, solid-state disks (SSDs) employ a flash translation layer (FTL) to manage the logical-to-physical address translation. By leveraging the address indirection feature of SSDs, the IC can be processed only by remapping flash pages to new logical addresses without flash read/write operations. In the existing studies on remap-based IC, SSDs were assumed to have only a single FTL instance. However, recent large-capacity SSDs adopt an arrayed architecture including multiple FTL controllers, where each controller runs an FTL instance to manage its own partitioned address space. For the arrayed SSDs, inter-partition copy requests cannot be handled by address remapping because each partition is managed by a different FTL instance. In this study, we propose an inter-partition remap technique for IC-enabled arrayed SSDs. Additionally, we present the block allocation technique to minimize the number of inter-partition copy requests. Our proposed IC techniques were implemented on an actual arrayed SSD, and showed significant performance improvements compared to the previous remap techniques in several use cases.
Curcumin Derivatives Verify the Essentiality of ROS Upregulation in Tumor Suppression

Background: Curcumin has been shown to exert pleiotropic biological effects, including anti-tumorigenic activity. We previously showed that curcumin controls reactive oxygen species (ROS) levels through the ROS metabolic enzymes, to prevent tumor cell growth. In this study, we synthesized 39 novel curcumin derivatives and examined their anti-proliferative and anti-tumorigenic properties. Methods and Results: Thirty-nine derivatives exhibited anti-proliferative activity toward human cancer cell lines, including CML-derived K562 leukemic cells, in a manner sensitive to an antioxidant, N-acetyl-cysteine (NAC). Some compounds exhibited lower GI50 values than curcumin, some efficiently induced cell senescence, and others markedly increased ROS levels, efficiently induced cell death and suppressed tumor formation in a xenograft mouse model, without any detectable side effects. A clustering analysis of the selected compounds and their measurement variables revealed that anti-tumorigenic activity was most well-correlated with an increase in ROS levels. Pulldown assays and a molecular docking analysis showed that curcumin derivatives competed with co-enzymes to bind to the respective ROS metabolic enzymes and inhibited their enzymatic activities. Conclusions: The analysis of novel curcumin derivatives established the importance of ROS upregulation in suppression of tumorigenesis, and these compounds are potentially useful for the development of an anti-cancer drug with few side effects.
Outcomes of Carotid Body Tumor Management with Active Surveillance

Objectives: To assess outcomes of carotid body tumors (CBTs) managed with active surveillance. Methods: Retrospective chart review of CBTs managed with active surveillance from 2001 to 2019. Results: A total of 115 cases were identified during chart review. Sixty-five of these patients were managed with active surveillance, and 11 patients had bilateral tumors for a total of 76 tumors. Follow-up records with symptomatic outcomes were available for 51 patients, and 47 tumors had follow-up imaging. Thirty-one (66%) actively surveilled CBTs remained stable or decreased in size while 16 (34%) increased in size. Patients undergoing active surveillance developed symptoms in 12 cases, 6 of these patients underwent surgical intervention. Nine CBTs managed with active surveillance (18%) were ultimately resected. The majority of patients who did not undergo surgical intervention never developed symptoms (36/42, 86%). Conclusions: Active surveillance may be a reasonable approach for a subset of CBTs.
Mean-Variance Analysis in Bayesian Optimization under Uncertainty: Supplementary Materials

A Proofs 2 A.1 Proof of Lemma 3.1 . 2 A.2 Proof of Theorem 4.1 . 2 A.3 Proof of Theorem 4.2 . 6 A.4 Proof of Theorem 4.3 . 10
Complement evasion by bacteria and parasites.

INTRODUCTION . 201 THE COMPLEMENT SYSTEM: AN OVERVIEW . 202 Cl Activation and Control . 203 C3 Chemistry. 203 Control of Alternative Pathway Activation. 205 C3 Receptors . 206 C5b-9 and Poly C9 Formation . ". 206 Control Proteins . 207 STRATEGIES OF COMPLEMENT EVASION . 208 Failure to Activate Complement . " . 208 Microbial Shedding of Molecules that Activate or Destroy Complement . 2 1 1 Synthesis or Acquisition of Regulatory Molecules. 2 1 2 Blockade of Activation Before C5b-9 Formation . 2 1 4 Formation of a Nonlytic C5b-9 Complex . 2 16 Hypothetical Mechanisms for Complement Resistance a t the C5b-9 Step . 2 1 9 Microbial Use of Complement Receptors t o Gain Access to Intracellular Locations . 219 CONCLUSIONS . :. 221
Repetitive aggressive encounters generate a long-lasting internal state in Drosophila melanogaster males

Significance To survive, an organism must adjust its behavior based upon past experiences. In Drosophila, aggression affects fitness as it ensures access to food and mating resources. Here, we show that upon repeated aggressive encounters, males adopt a winner or loser state that shows the qualities of persistence and generalization. Winning is perceived as rewarding, while losing is aversive. We also demonstrate that the activity of specific dopamine neurons is needed for males to avoid an odor previously paired with losing. Although the effects of losing and winning have been extensively studied in other species, our work advances the use of Drosophila as a model for circuit dissection of internal states that promote behavioral changes associated with winning or losing fights. Multiple studies have investigated the mechanisms of aggressive behavior in Drosophila; however, little is known about the effects of chronic fighting experience. Here, we investigated if repeated fighting encounters would induce an internal state that could affect the expression of subsequent behavior. We trained wild-type males to become winners or losers by repeatedly pairing them with hypoaggressive or hyperaggressive opponents, respectively. As described previously, we observed that chronic losers tend to lose subsequent fights, while chronic winners tend to win them. Olfactory conditioning experiments showed that winning is perceived as rewarding, while losing is perceived as aversive. Moreover, the effect of chronic fighting experience generalized to other behaviors, such as gap-crossing and courtship. We propose that in response to repeatedly winning or losing aggressive encounters, male flies form an internal state that displays persistence and generalization; fight outcomes can also have positive or negative valence. Furthermore, we show that the activities of the PPL1-γ1pedc dopaminergic neuron and the MBON-γ1pedc>α/β mushroom body output neuron are required for aversion to an olfactory cue associated with losing fights.
Educationmismatch , human capital and labour status of young people across European Union countries

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Saturn and its Rings: Four Centuries of Imperfect Amodal Completion

The planet Saturn is a familiar image for us, but it presents perceptual peculiarities that impeded the discovery of its structure and which can still be misleading today. Saturn appears to be surrounded by rings which hide it to a certain extent and then continue behind the outline of the planet. What we perceive is the result of a double amodal completion in which the planetary globe and the rings exchange the roles of occluding and occluded surface. Saturn was hidden to 17th-century astronomers for half a century because their rudimentary telescopes did not reveal the pictorial clues that are fundamental for discovering such a complex perceptual organization as that formed by a globe surrounded by rings. Moreover, the existence of a celestial body of this nature was inconceivable in light of the knowledge of those times. The improvement of telescopes has substantially enriched our knowledge of Saturn, but historic documents highlight the importance of perceptual organization factors. Astronomical observations were a rich source of information, but only Huygens was capable of integrating them and hypothesizing the true structure of Saturn. His drawings are the result of a particular ability to integrate observations and also the ability to use pictorial information. It is likely that these diagrams were an important instrument for the solution. The image of Saturn, however clear, will not find universal consensus. The planet has “residual (perceptual) capacities” of hiding itself which can even deceive modern instruments. Here, we will try to understand why.
Evaluating online customer data helpfulness to set targets: a QFD perspective

Retrieving knowledge and useful information from customers is crucial to develop customer-focused products and maintain the market share. With the rapid growth of the Internet, the ability of users to create and publish content has generated a wealth of product information from customers’ point of view. Given the abundance of large scale, publicly available data social media can enable novel social ways of providing and receiving feedback from new products and concepts. In order to avoid information overload, identifying and analyzing helpful reviews has become a critical challenge. Identifying helpful online reviews and learning how to extract valuable data from product design perspective has become a crucial task due to the existing information overload –identifying what is relevant to analyze is a key task for companies. Existing studies have focused on identifying variables that affect the perceived helpfulness of an online comment. To the best author’s knowledge, actual studies about helpfulness do not consider the Quality Function Deployment perspective on evaluating to what extend the customer data from social media is helpful to set objective targets. The thesis aims to evaluate social media data helpfulness from the designer’s perspective taking as basis QFD. Evaluating this, the work hypothesis is that the helpfulness definition has to move beyond, taking into consideration what is needed to build The House of Quality, a key tool in product design. To do so, an exploratory analysis of real public data from Twitter, Facebook and iMore forum is taken as basis. The purpose of undertaking exploratory research is primarily to investigate and to identify if the proposed variables for defining review’s helpfulness currently existing in the literature review can help designers in target setting within a QFD perspective The presented thesis shows that to go further within target setting is needed to have the QFD perspective: not all current exposed variables do not help to explain online reviews helpfulness.