Miracle-dz/UniFAR-FTUs huggingface dataset:
Observations on Rotating Instabilities and Spike Type Stall Inception in a High-Speed Multistage Compressor

This work investigates high-frequency measurements for the contribution to the understanding of different stall inception types in high-speed multistage compressors. A 3.5-stage high-speed axial multistage compressor is investigated with a 2 MW test rig in the Laboratoire de Mecanique des Fluides et d’Acoustique (LMFA) at Ecole Centrale de Lyon, France. Two different types of instabilities arise in this compressor as a function of shaft speed. At part speed, a controversy called “rotating instability” type flow field modulation is identified with the measurements. New results are the demonstration of the periodic behavior of this instability and the analogy to classical frequency modulation, periodic to one revolution of the instability. Furthermore, the amplitude of the instability is modulated by the time period of a rotor revolution. At nominal speed, the abrupt spike type stall inception is detected, taking usually less than five rotor revolutions.
An Estimation Method Matched to Microcomputer-Aided On-Line Measurement of Leq by Use of Statistical Information on the Noise Level Fluctuation

In this paper, a general estimation method of Leq noise evaluation index is proposed using the statistical information on the noise level fluctuation. This method is given in an expansion type estimation formula universally applicable to the arbitrary non-Gaussian distribution, including a well-known simplified expression derived under the assumption of a standard Gaussian distribution as the first approximation. At this time, for extracting the statistical information on the noise level fluctuation, we propose an iterative processing algorithm matched to the microcomputer-aided on-line measurement. Next, a selection method of the optimum order of this expansion type Leq estimation formula is proposed by
Challenging the robustness of optimal portfolio investment with moving average-based strategies

The aim of this paper is to compare the performance of a theoretically optimal portfolio with that of a moving average-based strategy in the presence of parameter misspecification. The setting we consider is that of a stochastic asset price model where the trend follows an unobservable Ornstein–Uhlenbeck process. For both strategies, we provide the asymptotic expectation of the logarithmic return as a function of the model parameters. Then, numerical examples are given, showing that an investment strategy using a moving average crossover rule is more robust than the optimal strategy under parameter misspecification.
A numerical approach for solving a nonlinear inverse diusion problem by Tikhonov regularization

In this paper, we propose an algorithm for numerical solving an inverse nonlinear diffusion problem. In additional, the least-squares method is adopted to find the solution. To regularize the resultant ill-conditioned linear system of equations, we apply the Tikhonov regularization method to obtain the stable numerical approximation to the solution. Some numerical experiments confirm the utility of this algorithm as the results are in good agreement with the exact data.
Role of angiogenesis and angiogenic factors in colorectal cancer

Colorectal cancer, the second most frequent cause of death worldwide, is due to genetic changes in gastrointestinal cells Carcinogenesis depends on/is promoted/induced/initiated by/activation of oncogenes or inactivation of tumour suppressor genes. Microscopic human cancers may remain dormant for lifetime Tumor progression depends on a cascade of events during which the non-angiogenic phenotype switches to the angiogenic one. The switch promotes immediate recruitment of new blood vessel and, ultimately,
Mobile measurements of ship emissions in two harbour areas in Finland

Abstract. Four measurement campaigns were performed in two different environments – inside the harbour areas in the city centre of Helsinki, and along the narrow shipping channel near the city of Turku, Finland – using a mobile laboratory van during winter and summer conditions in 2010–2011. The characteristics of gaseous (CO, CO2, SO2, NO, NO2, NOx) and particulate (number and volume size distributions as well as PM2.5) emissions for 11 ships regularly operating on the Baltic Sea were studied to determine the emission parameters. The highest particle concentrations were 1.5 × 106 and 1.6 × 105 cm−3 in Helsinki and Turku, respectively, and the particle number size distributions had two modes. The dominating mode peaked at 20–30 nm, and the accumulation mode at 80–100 nm. The majority of the particle mass was volatile, since after heating the sample to 265 °C, the particle volume of the studied ship decreased by around 70%. The emission factors for NOx varied in the range of 25–100 g (kg fuel)−1, for SO2 in the range of 2.5–17.0 g (kg fuel)−1, for particle number in the range of (0.32–2.26) × 1016 # (kg fuel)−1, and for PM2.5 between 1.0–4.9 g (kg fuel)−1. The ships equipped with SCR (selective catalytic reduction) had the lowest NOx emissions, whereas the ships with DWI (direct water injection) and HAMs (humid air motors) had the lowest SO2 emissions but the highest particulate emissions. For all ships, the averaged fuel sulphur contents (FSCs) were less than 1% (by mass) but none of them was below 0.1% which will be the new EU directive starting 1 January 2015 in the SOx emission control areas; this indicates that ships operating on the Baltic Sea will face large challenges.
Strength and stiffness properties of mixtures of granitic soil-cement Resistance

This paper will focus on the sensitivity of strength and stiffness properties of silty-sands, from granitic residual soil, which can be converted to a highly improved material if stabilized with cement. The study of soil stabilization with cement demands to quantify the influence of the cement percentage, porosity and water content adopted in the admixing process for different stresses and physical states. Firstly, this influence was quantified in terms of the unconfined strength and maximum deformability modulus executing unconfined compression tests as well as seismic wave velocities measurements in thoroughly controlled conditions in laboratory, varying the factors indicated above. Then, drained triaxial tests with very precise instrumentation were performed in some specimens with such a cement percentage and water content fixing the relationship between the void ratio and the volume of cement. RÉSUMÉ Les propriétés de résistance et de rigidité des mélanges de sol-ciment sont analysées dans cet article. En effet, les sables limoneux utilisés dans cette étude peuvent devenir un matériau très résistant si amélioré en ajoutant ciment. L’étude de la stabilisation par ciment nécessite la quantification de l’influence du pourcentage de ciment, porosité et teneur en eau adopté dans le mélange pour les différents états physiques et de contraintes. D’abord, l’influence est analysée par la résistance à la compression uniaxial et par la vélocités des ondes séismiques. Ensuite, quelques essais triaxiaux drainés ont été réalisés sur éprouvettes préparés avec un pourcentage de ciment et quantité d’eau suffisantes pour que les vides divisé par le volume de ciment soit fixé.
On the skewed sex ratio of the Kakapo Strigops habroptilus: sexual and natural selection in opposition?

The Kakapo Strigops habroptilus is unique amongst parrots in many respects, not least its use of a lek breeding system. Since Merton et al. first described the phenomenon, little new information has come to light, chiefly as a result of the extreme rarity of Kakapo. Observation of an extreme sex ratio skew in favour of males has received little attention and has been considered spurious. I used subfossil material to examine the nature of the sex ratio prior to the arrival in New Zealand of humans and demonstrated that a sex bias in favour of males in the order of 2:1 existed at that time. Although apparently untenable on traditional theoretical grounds, this extreme skew has been persistent and has resulted from the interaction of sexual and natural selection on dimorphic male and female Kakapo. Relatively small, sole caring females may suffer the consequences of parental investment as a result of demands made by offspring over an extended rearing period. In particular, larger male chicks may exert a greater cost on the parent bird than do female siblings. Additionally, brood reduction in certain circumstances may favour the survival of dominant male siblings.
State-directed political assassination in Israel: A political hypothesis

Extant theories explain reasonably well why the Israeli state exercises a given level of violence against substate actors. Based on economic or sociological models of human action, these theories attribute the level of state violence, respectively, to the narrow cost-benefit calculations of state officials or the institutionally embedded norms that govern their deliberations. The strength of such theories notwithstanding, this article argues that they fail to account for the willingness of Israeli officials to order the assassination of high-ranking political opponents during the second intifada, or Palestinian uprising against Israel. This article’s analysis of published sources concerning the assassination of Hamas leaders Ahmed Yassin and Ismail Abu Shanab and of interviews with 74 Israeli counterterrorist experts suggests that the decision to engage in state-directed political assassination in the period 2000–5 was based less on narrow calculations and institutionally specific norms than on identifiable political contingencies. Specifically, the second intifada appears to have led many Israeli decision-makers to favour creating chaos in the Palestinian political system, a goal that was well served by the policy of political assassination. The policy’s effect was to forestall the founding of a viable, independent Palestinian state.
Trends and Hybridization Factor for Heavy-Duty Working Vehicles

Reducing the environmental impact of ground vehicles is one of the most important issues in modern society. Construction and agricultural vehicles contribute to pollution due to their huge power trains, which consume a large amount of petrol and produce many exhaust emissions. In this study, several recently proposed hybrid electric architectures of heavy-duty working vehicles are presented and described. Producers have recently shown considerable attention to similar research, which, however, are still at the initial stages of development. In addition, despite having some similarities with the automotive field, the working machine sector has technical features that require specific studies and the development of specific solutions. In this work, the advantages and disadvantages of hybrid electric solutions are pointed out, focusing on the greater electromechanical complexity of the machines and their components. A specific hybridization factor for working vehicles is introduced, taking into account both the driving and the loading requirements in order to classify and compare the different hybrid solutions
Performance Evaluation of AES algorithm on Supercomputer IMAN1

Advanced Encryption Standard (AES) is one of the most popular encryption algorithms. The algorithm uses a combination of Exclusive-OR operations (XOR), octet substitution with an S-box, row and column rotations, and a Mix Column. In this paper the parallel implementation of AES cryptography algorithm is evaluated and compared in terms of running time, speed up and parallel efficiency. The parallel implementation of AES is implemented using message passing interface (MPI) library, and the results have been conducted using IMAN1 Supercomputer. The experimental results show that the run time of AES algorithm is decreased as the number of processors is increased. Moreover, the speedup for the data size of 16, 32, 64, 128, 256, and 1024-KB is increased when the number of processors is equal to 2, 4, 8, and 16.
Scaled experiments using the helium technique to study the vehicular blockage effect on longitudinal ventilation control in tunnels

A model tunnel (1:30 compared to a standard tunnel section) with a helium-air smoke mixture was used to study the vehicular blockage effect on longitudinal ventilation smoke control. The experimental results showed excellent agreement with full-scale data and confirmed that the critical velocity decreases in proportion with the blockage ratio. Nevertheless, it was found that the relative position of the fire source and the relative size of the vehicular blockage can have an opposite effect, as the vehicular blockage influenced the critical and confinement velocity. The method demonstrated the ability to provide valuable information on the effect of vehicular blockage on tunnel fire dynamics.
Scheduling for carrier aggregation with LTE-A Yeung uk

The 4th generation mobile communication systems, LTE-A, have explosive subscriber increase and the demand of supporting backward capability for LTE users. Therefore, LTEA systems need more careful allocation of communication resources to provide enough data rate from BS for subscriber devices. This thesis deals with scheduling for efficient resource distribution according to whether the subscriber can use carrier aggregation. We propose the scheduling with a max-min optimization tool to improve the performance of subscribers as distinct cell coverage areas are served with different frequency bands. The simulation results show performance improvement of the subscribers both for LTE and LTE-A.
Non-relativistic leptogenesis

In many phenomenologically interesting models of thermal leptogenesis the heavy neutrinos are non-relativistic when they decay and produce the baryon asymmetry of the Universe. We propose a non-relativistic approximation for the corresponding rate equations in the non-resonant case, and a systematic way for computing relativistic corrections. We determine the leading order coefficients in these equations, and the first relativistic corrections. The non-relativistic approximation works remarkably well. It appears to be consistent with results obtained using a Boltzmann equation taking into account the momentum distribution of the heavy neutrinos, while being much simpler. We also compute radiative corrections to some of the coefficients in the rate equations. Their effect is of order 1% in the regime favored by neutrino oscillation data. We obtain the correct leading order lepton number washout rate in this regime, which leads to large (∼ 20%) effects compared to previous computations. bodeker@physik.uni-bielefeld.de mwoermann@physik.uni-bielefeld.de
Comparison of MODIS and AVHRR 16‐day normalized difference vegetation index composite data

Normalized difference vegetation index (NDVI) data derived from visible and near‐infrared data acquired by the MODIS and AVHRR sensors were compared over the same time periods and a variety of land cover classes within the conterminous USA. The relationship between the AVHRR derived NDVI values and those of future sensors is critical to continued long term monitoring of land surface properties. The results indicate that the 16‐day composite values are quite similar over the 23 intervals of 2001 that were analyzed, and a linear relationship exists between the NDVI values from the two sensors. The composite AVHRR NDVI data were associated with over 90% of the variation in the MODIS NDVI values.
Sleep disorders in patients with psoriatic arthritis and psoriasis

Objectives To assess and measure occurrence of sleep disorders in patients with psoriatic arthritis (PsA) and psoriasis (Ps). Material and methods The study included 62 patients with psoriatic arthritis and 52 patients with psoriasis. The measurement of sleep quality was conducted using the Pittsburgh Sleep Quality Index (PSQI), the evaluation of fatigue by the fatigue subscale of the FACIT-F questionnaire and the patient’s quality of life by the Health Assessment Questionnaire (HAQ). The psoriasis severity was determined using the Psoriasis Area Severity Index (PASI) and the activity of arthritis by the disease activity score of 28 joints (DAS 28). The Visual Analogue Scale (VAS) was used to assess the severity of pain. Results Poor sleep quality was found in 67.7% of PsA patients, 57.7% in Ps patients and 14.6% within the control group. Sleeping disorders in patients with PsA and Ps were related to worse quality of life and intense fatigue. Methotrexate treatment was not related to sleeping disorders, but an improvement in sleep quality was observed in both PsA and Ps patients who were treated with anti TNF-α antibodies (p < 0.001 and p = 0.032 respectively). Following the use of the linear regression model, the following factors worsen the sleep quality in PsA: pain (R2 = 0.462, p < 0.001), tender joint count (R2 = 0.434, p < 0.001), C-reactive protein (CRP) concentration (R2 = 0.391, p < 0.001), patient’s age (R2 = 0.284, p = 0.003) and duration of psoriasis (R2 = 0.166, p = 0.006). In Ps patients the factors were: severity of skin lesions (R2 = 0.329, p < 0.001), duration of psoriasis (R2 = 0.290, p = 0.004) and patient’s age (R2 = 0.282, p = 0.019). Conclusions Poor sleep quality in patients with PsA or Ps is a common symptom. Sleep disorders are more frequent in patients with PsA than in those with psoriasis.
Is Knowing Half the Battle? The Effects of Acceptance and Commitment Therapy Compared to Psychoeducation on Stigma Towards Mental Illness

Both Acceptance and Commitment Therapy (ACT) and Psychoeducation have been shown to reduce stigmatizing thoughts towards individuals with mental illness. The present study compared the effects of a 50 minute ACT and 50 minute psychoeducation workshop on levels of stigma in college students (N = 76). Psychological flexibility and knowledge about mental illness were examined as potential mechanisms by which the workshops generated stigma reduction. Participants were randomly assigned to either workshop with pre and post scores on the Community Attitudes Towards the Mentally Ill scale used as the primary dependent variable. Both workshops were effective in reducing levels of stigmatizing attitudes towards individuals with psychological difficulties. However, psychological flexibility and mental health knowledge did not mediate changes in stigma. Implications for clinical significance and further research directions are
How to manage careers in Slovak small and medium-sized wood-processing enterprises

Current approaches to human resource management are focused on the sustainable development of small and medium-sized enterprises (SMEs). Career strategies of employees are its integral part. The aim of this paper is to determine the changes in professional priorities of employees in small and medium-sized wood-processing enterprises in the area of motivation relating to career aspiration throughout the course of life. The research outcomes show significant correlation between age, gender, and motivation factors relating to career aspiration. Slovak women working in SMEs prefer motivation factors relating to finances, mutual relationships, work, and career aspiration. Motivation factors selected by men are almost the same. In terms of age, motivation factors relating to career aspiration are preferred mainly by women aged 30 to 40 years old. Mentioned factors become less important for respondents of older age groups. Men working in SMEs prefer the motivation factors relating to career aspiration at the age of 30 and subsequently they become less important as well. Following the outcomes of this research, managers of SMEs should motivate career-oriented employees especially according to their needs. In the long-term perspectives, managers can encourage employees to stay focused on their careers.
THE SOCIO-DEMOGRAPHIC CORRELATIONS OF PSYCHOLOGICAL CAPITAL

The definition and content of psychological capital is not unitary in the professional literature. Research carried out in this subject is directed at exploring cause-result correlations between certain personal psychological constructs and one of the aspects of labour productivity. In our research the positive, psychology based concept of Psychological Capital (PsyCap) defined by Luthans et al (2007a) is used. This concept consists of four components: self-efficacy, optimism, hope and resiliency which are measured by the Psychological Capital Questionnaire (PsyCap) invented by them. The present paper is a pilot study using the Psychological Capital Questionnaire for the first time in Hungary. Within its framework the Psychological capital questionnaire is applied for the job starters with a business qualification in higher education by examining the sociodemographic correlations (gender, studies, labour market characteristics). The main constraints of the examination are the cross-section layout of the research and few elements in the sample, which limit our cause and effect conclusions. On the basis of the significant results Psychological Capital is considered to determine success in finding a job, earning a good salary and being satisfied with the career alike when employing job starting graduates with a business qualification at the beginning of their career in the labour market.
Brain Consequences of Spinal Cord Injury with and without Neuropathic Pain: Translating Animal Models of Neuroinflammation onto Human Neural Networks and Back

Abstract : This project aims to investigate the consequence of spinal cord injury with regards to alterations in brain network function and expression of activated microglia, both human patients and in an animal model. During year one, we have: Obtained IRB and HRPO approval for the human studies, obtained IACUC and ACURO approval for the animal studies, refined the human study protocol and collected PET-MR data on healthy individuals and spinal cord injured subjects, developed the rodent imaging procedures including awake rat fMRI, collected pilot PET and MRI rat data, refined the spinal cord injury model. Human imaging data is of consistently high quality and is reliably collected, albeit with some concerns regarding patient recruitment being slower than anticipated. Animal imaging data is of sufficient quality, and efforts are underway to improve animal data collection. The animal spinal cord injury model has been refined. Data collection has been delayed due to regulatory procedures with regards to IACUC approvals, personnel training and personnel turnover.
17O NMR evidence of free ionic clusters Mn+ CO32− in silicate glasses: Precursors for carbonate-silicate liquids immiscibility

Abstract Carbon dioxide is a ubiquitous component of low-silica melts such as kimberlites or melilitites. It is currently assumed that CO2 molecules dissolving in low-silica melts as carbonate groups (CO32−) $\rm(CO_{3}^{2-})$ induce a strong polymerization of the silicate network; however, the exact molecular configuration of this dissolution mechanism is still debated. Using 17O MAS NMR spectroscopy, we have investigated the carbonate molecular environment in a series of synthesized low-silica (31–41 wt% SiO2), CO2-bearing (from 2.9 to 13.2 wt% CO2) silicate glasses analogous to melilitites and kimberlites. With the selective {13C}-, {27Al}-, and {29Si}-17O J HMQC NMR method, we show that CO2 dissolved in the studied low-silica glasses is totally disconnected from the silicate network, forming free ionic clusters (FIC) Mn+ (CO32−) $\rm(CO_{3}^{2-})$ with Mn+, a charge compensating cation. The Mn+ (CO32−) $\rm(CO_{3}^{2-})$ FIC are considered as precursors to immiscibility in between carbonate and silicate liquids. Observed in all studied compositions, we suggest that this immiscibility can be produced from moderately to strongly depolymerized silicate melt compositions.