LLukas22/scidocs huggingface dataset:
Chunk-Based Resource Allocation in Multicast OFDMA Systems with Average BER Constraint

The resource allocation problem for the downlink of Orthogonal Frequency Division Multiple Access (OFDMA) wireless multicast systems is investigated. It is assumed that both the Base Station (BS) and each user are equipped with a single antenna and the allocation unit is not the subcarrier, as in conventional OFDMA systems, but a set of contiguous subcarriers (chunk). The aim of the proposed efficient algorithm is to maximize the total throughput subject to constraints on total available power and average Bit Error Rate (BER) over a chunk. Simulation and complexity analysis are provided to support the benefits of chunk-based resource allocation to multicast OFDMA systems.
An Adaptive PAM-4 5 Gb / s Backplane Transceiver in 0 . 25 um CMOS

This paper describes a novel backplane transceiver, which uses PAM-4 (pulse amplitude modulated four level) signalling and continuously adaptive transmit based equalization to move 5 Gcbh (channel bits per second) across typical FR-4 backplanes for total distances of up to 50 inches through two sets of backplane connectors. The paper focuses on the implementation of the equalizer and the adaptation algorithms, and includes measured results. The 17 mm2 device is implemented in a 0.25um CMOS process, operates on 2.5 V and 3.3 V supplies and consumes 1.2 W. 11. IMPLEMENTATION A. Transceiver Block Diagram A block diagram of the transceiver is illustrated in figure 1.
A cross-cultural examination of presenteeism and supervisory support

Purpose – The aim of this study was two-fold: first, to examine the noxious effects of presenteeism on employees’ work well-being in a cross-cultural context involving Chinese and British employees; second, to explore the role of supervisory support as a pan-cultural stress buffer in the presenteeism process. Design/methodology/approach – Using structured questionnaires, the authors compared data collected from samples of 245 Chinese and 128 British employees working in various organizations and industries. Findings – Cross-cultural comparison revealed that the act of presenteeism was more prevalent among Chinese and they reported higher levels of strains than their British counterparts. Hierarchical regression analyses showed that presenteeism had noxious effects on exhaustion for both Chinese and British employees. Moreover, supervisory support buffered the negative impact of presenteeism on exhaustion for both Chinese and British employees. Specifically, the negative relation between presenteeism and exhaustion was stronger for those with more supervisory support. Practical implications – Presenteeism may be used as a career-protecting or career-promoting tactic. However, the negative effects of this behavior on employees’ work well-being across the culture divide should alert us to re-think its pros and cons as a career behavior. Employees in certain cultures (e.g. the hardworking Chinese) may exhibit more presenteeism behaviour, thus are in greater risk of ill-health. Originality/value – This is the first cross-cultural study demonstrating the universality of the act of presenteeism and its damaging effects on employees’ well-being. The authors’ findings of the buffering role of supervisory support across cultural contexts highlight the necessity to incorporate resources in mitigating the harmful impact of presenteeism.
Estimating the Jacobian of the Singular Value Decomposition: Theory and Applications

The Singular Value Decomposition (SVD) of a matrix is a linear algebra tool that has been successfully applied to a wide variety of domains. The present paper is concerned with the problem of estimating the Jacobian of the SVD components of a matrix with respect to the matrix itself. An exact analytic technique is developed that facilitates the estimation of the Jacobian using calculations based on simple linear algebra. Knowledge of the Jacobian of the SVD is very useful in certain applications involving multivariate regression or the computation of the uncertainty related to estimates obtained through the SVD. The usefulness and generality of the proposed technique is demonstrated by applying it to the estimation of the uncertainty for three different vision problems, namely self-calibration, epipole computation and rigid motion estimation. Key-words: Singular Value Decomposition, Jacobian, Uncertainty, Calibration, Structure from Motion. M. Lourakis was supported by the VIRGO research network (EC Contract No ERBFMRX-CT96-0049) of the TMR Programme. Calcul de la Jacobienne de la Décomposition en Valeurs Singulières: Théorie et applications Résumé : La technique de Décomposition en Valeurs Singulières (SVD) d’une matrice est un outil algèbrique qui a trouvé de nombreuses applications en vision par ordinateur. Dans ce rapport, nous nous intéressons au problème de l’estimation de la jacobienne de la SVD par rapport aux coefficients de la matrice initiale. Cette jacobienne est très utile pour toute une gamme d’applications faisant intervenir des estimations aux moindres carrés (pour lesquelles on utilise la SVD) ou bien des calculs d’incertitude pour des grandeurs estimées de cette manière. Une solution analytique simple à ce problème est présentée. Elle exprime la jacobienne à partir de la SVD de la matrice à l’aide d’opérations très simples d’algèbre linéaire. L’utilité et la généralité de la technique est démontrée en l’appliquant à trois problèmes de vision: l’auto-calibration, le calcul d’épipoles et l’estimation de mouvements rigides. Mots-clés : Décomposition en valeurs singulières, Jacobienne, Incertitude, Calibration, Structure à partir du mouvement. Estimating the Jacobian of the Singular Value Decomposition: Theory and Applications 3
A SNP and SSR Based Genetic Map of Asparagus Bean (Vigna. unguiculata ssp. sesquipedialis) and Comparison with the Broader Species

Asparagus bean (Vigna. unguiculata ssp. sesquipedialis) is a distinctive subspecies of cowpea [Vigna. unguiculata (L.) Walp.] that apparently originated in East Asia and is characterized by extremely long and thin pods and an aggressive climbing growth habit. The crop is widely cultivated throughout Asia for the production of immature pods known as 'long beans' or 'asparagus beans'. While the genome of cowpea ssp. unguiculata has been characterized recently by high-density genetic mapping and partial sequencing, little is known about the genome of asparagus bean. We report here the first genetic map of asparagus bean based on SNP and SSR markers. The current map consists of 375 loci mapped onto 11 linkage groups (LGs), with 191 loci detected by SNP markers and 184 loci by SSR markers. The overall map length is 745 cM, with an average marker distance of 1.98 cM. There are four high marker-density blocks distributed on three LGs and three regions of segregation distortion (SDRs) identified on two other LGs, two of which co-locate in chromosomal regions syntenic to SDRs in soybean. Synteny between asparagus bean and the model legume Lotus. japonica was also established. This work provides the basis for mapping and functional analysis of genes/QTLs of particular interest in asparagus bean, as well as for comparative genomics study of cowpea at the subspecies level.
Metoprolol vs ivabradine in patients with mitral stenosis in sinus rhythm.

BACKGROUND
Severe mitral stenosis is usually symptomatic and is treated by BMV or surgery, whereas mild to moderate mitral stenosis is usually asymptomatic or mildly symptomatic and managed medically. Patients in the later group may become symptomatic during episodes of exercise and increased heart rate. Beta-blockers are frequently used in patients with mitral stenosis to control the heart rate and alleviate exercise-related symptoms. The objective of our study was to investigate the comparative efficacy of ivabradine versus metoprolol in patients with mitral stenosis in sinus rhythm.


METHODS
We studied 97 patients of mitral stenosis in sinus rhythm presented with exertional symptoms. The effectiveness of Metoprolol was compared with ivabradine in alleviating these exertional symptoms in a randomized, open label non crossover study. We also assessed various stress ECG parameters, 24 hour Holter parameters and 2D Echo parameters to objectively compare the effects of ivabradine and metoprolol in these patients.


RESULTS
Ivabradine and metoprolol both were effective in controlling exertional symptoms. Significant improvement in objective parameters like TMT (work capacity, baseline heart rate and maximal heart rate) and 2D echocardiography (right ventricular systolic pressure) are seen with both drugs. Ivabradine controls the exertional symptoms significantly more than metoprolol. On head to head comparison there was a significant benefit of working capacity and heart rate at maximal exercise in favour of ivabradine.


CONCLUSIONS
Ivabradine should be strongly considered in medical management of mitral stenosis patients where beta blockers are contraindicated such as reactive airway disease. The cost of ivabradine is higher than metoprolol which might possess constraints as most of the rheumatic heat disease patients belong to low socio economic status.
The Socialist Novel in Britain: Towards the Recovery of a Tradition@@@The Radical Imagination and the Liberal Tradition: Interviews with English and American Novelists

N.B. Dates in brackets indicate original date of publication if applicable. Achebe, Chinua. Things Fall Apart. Oxford: Heinemann, 1989 [1958] Ackroyd, Peter. ‘Future Imperfect.’ Spectator 21 December 1974: 797. Aldiss, Brian. ‘Living in Catastrophe.’ [1988] Doris Lessing: Conversations. Ed. Earl G. Ingersoll. Princeton: Ontario Review Press, 1994. 169-172. Allott, Miriam, ed. Novelists on the Novel. London: Routledge and Kegan Paul, 1959. Appleyard, Bryan. ‘Iris Murdoch as She is Writ.’ [Interview] Times 23 January 1988: 20. Arlett, Robert M. ‘The Dialectical Epic: Brecht and Lessing.’ Twentieth Century Literature 33.1 (1987): 67-79. Bakhtin, Mikhail. Problems of Dostoevsky’s Poetics. Manchester: Manchester University Press, 1984. Barrows, John. ‘Iris Murdoch.’ John O’London’s 4 May 1961: 498. Barthes, Roland. The Pleasure of the Text. Trans. Richard Miller. New York: Hill and Wang, 1975. Bayley, John. ‘Country Life: The Enigma of Arrival.’ New York Review of Books 9 April 1987: 3-4. Beck, Antony. ‘Doris Lessing and the Colonial Experience.’ The Journal of Commonwealth Literature 19.1 (1984): 64-73. Behr, Edward. ‘People are Proud of Being Stupid.’ [Interview] Newsweek 18 August 1980: 38. Bellamy, Michael O. ‘An Interview with Iris Murdoch.’ Contemporary Literature 18 (1977): 129-140. Bertelsen, Eve. ‘Doris Lessing.’ [1984] Doris Lessing: Conversations. Ed. Earl G. Ingersoll. Princeton: Ontario Review Press, 1994. 120-145. Berthoff, Warner. ‘Fortunes of the Novel: Muriel Spark and Iris Murdoch.’ Massachusetts Review 8 (1967): 301-332. Bertodano, Helena de. ‘Life is Stronger than Fiction: At 76, Doris Lessing Wants to be Alone.’ [Interview] Journal Extra: An Electronic Supplement to The Edmonton Journal (11 April 1996). Online. Internet. 14 June 1996.
Catatonia in the ICU: an important and underdiagnosed cause of altered mental status. a case series and review of the literature*.

OBJECTIVE
Catatonia is a neuropsychiatric syndrome with motor and behavioral symptoms occurring in patients with or without a history of psychiatric illness. Although it is associated with significant morbidity and mortality, the prevalence of catatonia in the ICU setting is unknown. The diagnosis and management of catatonia in the critically ill patient raises unique challenges. Furthermore, the diagnosis and management are not included in most critical care curricula. The objective of this retrospective study is to increase the awareness of this clinically important condition among critical care providers.


DESIGN
Retrospective case series study.


SETTING
Multiple critical care units at a university-affiliated tertiary care hospital.


PATIENTS
Five critically ill patients with catatonia, aged 17 to 78.


INTERVENTIONS
None.


MEASUREMENTS AND MAIN RESULTS
All notes, laboratory data, imaging results, other diagnostic studies, therapeutic interventions, and responses to treatment were reviewed for five critically ill patients with catatonia. No unifying cause of catatonia or predisposing conditions were identified for these patients. Currently available diagnostic criteria for catatonia were found to be nonspecific in the ICU setting. New diagnostic criteria for catatonia specific to the critically ill patient are proposed.


CONCLUSIONS
Catatonia can occur in a wide variety of critical care settings, with or without precedent psychiatric illness, and it may be exacerbated or induced by common intensive care practices. Psychomotor findings are imperative in examination of critically ill patients with altered mental status in order to diagnose catatonia.
Cooperating Robots for Search and Rescue

Many hypothesized applications of mobile robotics require multiple robots. Multiple robots substantially increase the complexity of the operator’s task because attention must be continually shifted among robots. One approach to increasing human capacity for control is to remove the independence among robots by allowing them to cooperate. This paper presents an initial experiment using multiagent teamwork proxies to help control robots performing a search and rescue task. .
Overweight children and adolescents – is there a subjective need for treatment?

We report on the first months of recruitment for a study to evaluate outpatient training for moderately overweight youths. Various recruitment strategies were employed, including media exposure, paediatricians, school events, and the distribution of flyers. Roughly 6 160 overweight and 4 720 obese children and adolescents of the target age range were estimated to live in the study area. Altogether, 172 families enrolled for participation. Only 38 enrolled children (22.1%), however, were overweight and thereby eligible for participation, 132 children (76.7%) were obese and two were normal weight. Most eligible participants were recruited via media or paediatricians. Reaching overweight, but not obese, children and adolescents for intervention is difficult, where a low recognition of the condition in its less extreme form might be a particular problem.
HIGH-CONVERSION-RATIO BIDIRECTIONAL DC – DC CONVERTER WITH COUPLED INDUCTOR

Abstract—In this paper, a high-conversion-ratio bidirectional dc–dc converter with coupled inductor is proposed. In the boost mode, two capacitors are parallel charged and series discharged by the coupled inductor. Thus, high step-up voltage gain can be achieved with an appropriate duty ratio. The voltage stress on the main switch is reduced by a passive clamp circuit. Therefore, the low resistance RDS (ON) of the main switch can be adopted to reduce conduction loss. In the buck mode, two capacitors are series charged and parallel discharged by the coupled inductor. The bidirectional converter can have high step-down gain. Aside from that, all of the switches achieve zero voltage-switching turn-on, and the switching loss can be improved. Due to two active clamp circuits, the energy of the leakage inductor of the coupled inductor is recycled. The efficiency can be further improved. The operating principle and the steady-state analyses of the voltage gain are discussed.
Understanding nurses' views on a pressure ulcer prevention care bundle: a first step towards successful implementation.

AIMS AND OBJECTIVES
To explore nurses' views of the barriers and facilitators to the use of a newly devised patient-centred pressure ulcer prevention care bundle.


BACKGROUND
Given pressure ulcer prevention strategies are not implemented consistently, the use of a pressure ulcer care bundle may improve implementation given bundles generally assist in standardising care.


DESIGN
A quality improvement project was undertaken after a pressure ulcer prevention care bundle was developed and pilot-tested.


METHODS
Short, conversational interviews with nurse explored their views of a patient-centred pressure ulcer care bundle. Interviews were audio-taped and transcribed. Inductive content analysis was used to analyse the transcripts.


RESULTS
A total of 20 nurses were interviewed. Five categories with corresponding subcategories emerged from the analysis. They were increasing awareness of pressure ulcer prevention, prompting pressure ulcer prevention activities, promoting active patient participation, barriers to using a pressure ulcer prevention care bundle and enabling integration of the pressure ulcer prevention care bundle into routine practice.


CONCLUSIONS
Benefits of using a patient-centred pressure ulcer prevention care bundle may include prompting patients and staff to implement prevention strategies and promote active patient participation in care. The success of the care bundle relied on both patients' willingness to participate and nurses' willingness to incorporate it into their routine work.


RELEVANCE TO CLINICAL PRACTICE
A patient-centred pressure ulcer prevention care bundle may facilitate more consistent implementation of pressure ulcer prevention strategies and active patient participation in care.
Effect of classroom modification on attention and engagement of students with autism or dyspraxia.

Students with autism display sensory sensitivities to environmental stimuli that affect their attending and engagement in classroom learning activities. The purpose of the study was to determine whether attending of 4 male students, ages 13-20, increased after the installation of sound-absorbing walls and halogen lighting. The multiple single-subject, mixed-method design, AB(B+C), included a 2-wk baseline and two intervention phases: 2 wk after sound-absorbing wall installation using the Owens Corning Basement Finishing System™ (Owens Corning, Toledo, OH) and 2 wk after halogen light installation. We calculated nonattending frequencies from videotaped class sessions and used visual analysis to measure within-phase and between-phase characteristics. Results included increased frequency and stability of attending and engagement and improved classroom performance, comfort, and mood. Journaling provided students' perspective on the modifications and reflected overall increased sensory comfort and themes of improved classroom environment, positive emotional response (mood), and improved classroom performance.
Predictive role of neutrophil-to-lymphocyte and platelet-to-lymphocyte ratios for diagnosis of acute appendicitis during pregnancy.

Acute appendicitis (AA) is not uncommon during pregnancy but can be difficult to diagnose. This study evaluated the neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) in addition to conventional diagnostic indicators of the disease to diagnose AA during pregnancy. Age, gestational age, white blood cell (WBC) count, Alvarado scores, C-reactive protein (CRP), lymphocyte count, NLR and PLR were compared among 28 pregnant women who underwent surgery for AA, 35 pregnant women wrongly suspected as having AA, 29 healthy pregnant women, and 30 nonpregnant healthy women. Mean WBC counts and CRP levels were higher in women with proven AA than in those of control groups (all p < 0.05). Among all the groups, the median NLR and PLR were significantly different in women with proven AA (all p < 0.05). Receiver operating characteristic analysis was used to determine cut-off values for WBC count, CRP, lymphocyte count, NLR and PLR, and multiple logistic regression analysis showed that NLR and PLR used with routine methods could diagnose AA with 90.5% accuracy. Used in addition to routine diagnostic methods, NLR and PLR increased the accuracy of the diagnosis of AA in pregnant women.
Mental well-being and mental illness: findings from the Adult Psychiatric Morbidity Survey for England 2007.

BACKGROUND
Mental well-being underpins many aspects of health and social functioning, and is economically important.


AIMS
To describe mental well-being in a general population sample and to determine the extent to which mental well-being and mental illness are independent of one another.


METHOD
Secondary analysis of a survey of 7293 adults in England. Nine survey questions were identified as possible indicators of mental well-being. Common mental disorders (ICD-10) were ascertained using the Revised Clinical Interview Schedule (CIS-R). Principal components analysis was used to describe the factor structure of mental well-being and to generate mental well-being indicators.


RESULTS
A two-factor solution found eight out of nine items with strong loadings on well-being. Eight items corresponding to hedonic and eudaemonic well-being accounted for 36.9% and 14.3% of total variance respectively. Separate hedonic and eudaemonic well-being scales were created. Hedonic well-being (full of life; having lots of energy) declined with age, while eudaemonic well-being (getting on well with family and friends; sense of belonging) rose steadily with age. Hedonic well-being was lower and eudaemonic well-being higher in women. Associations of well-being with age, gender, income and self-rated health were little altered by adjustment for symptoms of mental illness.


CONCLUSIONS
In a large nationally representative population sample, two types of well-being were distinguished and reliably assessed: hedonic and eudaemonic. Associations with mental well-being were relatively independent of symptoms of mental illness. Mental well-being can remain even in the presence of mental suffering.
Inhibition of platelet function with clopidogrel is associated with a reduction of inflammation in patients with peripheral artery disease.

BACKGROUND
The reactivity of platelets is increased in patients with peripheral artery disease (PAD). RANTES and sCD40L are chemokines which are stored in the alpha-granules of platelets. Clopidogrel inhibits and thus reduces platelet reactivity. Whether a treatment with clopidogrel is associated with an inhibition of systemic inflammation in patients with PAD has not been thoroughly explored. This study examined the effect of clopidogrel on platelet reactivation and the release of inflammatory chemokines in patients with PAD.


METHODS
40 patients with PAD were randomized into two groups. In the first group A the patients were treated with 100mg acetylsalicylic acid (ASA) and additional placebo for 4weeks. The patients in group B received 75mg/d clopidogrel in addition to ASA 100mg for 4weeks. After obtaining blood at days 0, 7 and 28 the platelet activation was determined by measuring the surface protein expression of CD63, CD62p and thrombospondin (TSP) after stimulation with TRAP and ADP. The release of the chemokines RANTES and sCD40L from platelets was analyzed by ELISA.


RESULTS
Platelet activation markers (CD62p and CD63) and chemokine RANTES were significantly reduced in patients with PAD after 7 and 28days after treatment with clopidogrel. No alterations were found in TSP expression and sCD40L during the treatment.


CONCLUSION
The treatment with clopidogrel leads to a reduction of platelet reactivity and release of RANTES from the platelets of patients with PAD.