Miracle-dz/UniFAR-FTUs huggingface dataset:
Sandwich matrices, Solomon algebras, and Kazhdan-Lusztig polynomials

Sandwich matrices have proved to be of importance in semigroup theory for the last 50 years. The work of the author on algebraic monoids leads to sandwich matrices in group theory. In this paper, we find some connections between sandwich matrices and the Hecke algebras (for monoids) introduced recently by Louis Solomon. At the local level we then obtain an explicit isomorphism between Solomon's Hecke algebra and the complex monoid algebra of the Renner monoid. In the simplest case of monoids associated with a Borel subgroup, we find that the entries of the inverse of the sandwich matrix, as well as those of the related structure matrix of Solomon's Hecke algebra are «almost» the polynomials R x,y associated with the Kazhdan-Lusztig polynomials
The adverse effect of real effective exchange rate change on trade balance in European transition countries

Most European transition countries have fixed or highly managed flexible exchange rate regimes. This exchange rate rigidity is sometimes argued to worsen the trade balance by keeping the currency overvalued. However, there is no unambiguous evidence that currency depreciation/devaluation positively affects trade balance and leads towards the adjustment, even in the short-run. Therefore, we examine the effect of real effective exchange rate (hereafter REER) on trade balance in European transition economies over the period 2000-2015. By using fixed effect model for static and generalised method of moments for dynamic estimation, we find that there is an adverse effect of the REER on trade balance in European transition countries over the period 2000-2015. Namely, depreciation of REER deteriorates trade balance in European transition countries, which could be explained by high import dependence and low export capacity. This implies that policymakers in European transition countries should not use exchange rate policy to improve trade balance. This is important in the light of their accession towards European economic and monetary integration, implying that these countries should focus more on using fiscal, rather than monetary (and exchange rate), policy to adjust trade balance, which is one of the required real convergence towards the EU standards.
High-dimensional data and variable selection

In statistics or machine learning, we often want to explain some output Y ∈ Y from input X ∈ X ⊂ Rp by observing a data set Dn = {(Xi, Yi)}1≤i≤n of i.i. d. observations. In previous lessons, we saw methods such as Ordinary Least Square Regression, K-Nearest Neighbors, Probabilist models or Kernel regression. Today, we would like to deal with high-dimensional input spaces, i.e., large p (possibly p n). We will have two motivations in mind: – prediction, accuracy : when p n classical models fail. Is it possible to have strong theoretical guarantees on the risk (i.e., generalization error)? – model interpretability : by removing irrelevant featuresXi (i.e, by setting the corresponding coefficients estimates to zero), the model will easier to understand. Good references on this topic are Giraud [2014] and Friedman et al. [2001].
Research on Economic Development Stage and Marginal Effects of Trade and FDI on Economic Growth in China

Since reform and opening up. exports and FDI, as two main internationalization patterns, successfully promote China's economic growth and increase the per capita income. In the mean time, it widens the regional economic gap. Whether exports and FDI are still two engines to promote China’s economic growth in a new stage of development? This paper collects provincial panel data from 1987 to 2010 in China with three economic areas, the east, the middle, and the west, and divides them into two periods, before entry into WTO and after, to study the stage of economic development’s growth effect on trade and FDI empirically. It concludes that the developed eastern area’s exports have the strongest promotion effect on economy, but its promotion effect is weakening now and weaker than the imports’ promotion effect which is still increasing now, in the compared undeveloped mid and west of China. Furthermore, FDI’s growth effects on all the three economic areas are increasing. In a word, foreign trade and FDI’s growth effects change periodically in the different stages of development, so the policy mix of trade and FDI need to be adjusted with economic development.
Recommendations of Polish Society of Physiotherapy, Polish Society of Family Medicine and College of Family Physicians in Poland for hip joint pain in primary health care

Background. the authors share the view that the treatment of degenerative changes concerning the hip is a multidisci plinary activity. in the opinion of the authors, in the physiotherapeutic procedure, the order of developing periarticular structures is important when restoring normal homeostasis (blood supply, oxygenation, tonus, nutrition), in the area of the joint where there is a modified distribution of resting tension of soft tissues. Patient condition improvement, especially in those with less severe symptoms of degenerative disease (yet are without significant structural changes in the joint and without functional limitations), seems to be the most justified at the level of services provided by the primary care physician. within the basic health care stage is to propose a simple, uncomplicated set of physiotherapeutic actions that would allow, in particular at the first stage of change, the performance of activities decelerating degenerative processes in this joint and, hence, limiting the pain. the publication is a proposal for a new model of patient care in the system of Polish primary health care, and it is intended to form a background for systemic solutions (including the creation of an interdisciplinary cooperation model) that could be implemented. Material and methods. Experts from the Polish society of Physiotherapy, the society of Family medicine and the College of Family Physicians have reviewed published evidence from 2008-2018 regarding the use of physiotherapy in treating degenerative changes of the hip joint that have been placed online in Pubmed and Cochrane Collaboration. Conclusions. maintaining good efficiency in hip joint pain patients is the priority in the treatment proceedings. achievement of the above mentioned goal is possible through improvement of the accessibility of health services, the introduction of early (basic) thera peutic actions (education and physioprophylaxis) and actively engaging patients in the rehabilitation process (self-therapy) as con ducted by the physiotherapist and the individual patient in cooperation with a primary care physician. shaping a health-conscious attitude within primary care patients, the slowing down of disease progression and the postponing more advanced treatment forms are all further benefits resulting in reduction of the treatment costs within the healthcare system.
The Effect of Texting on Balance and Temporospatial Aspects of Gait

The purpose of this study was to determine effects of texting on standing balance and the temporospatial aspects ofgait. It was hypothesized that texting would decrease stride velocity and increase deviation from midline while walking, as well asincrease centre of pressure (CoP) excursions while standing. Fifteen participants (eleven males and four females, 21.12±1.25 yearsof age) performed two standing balance tasks and two walking tasks. A repeated measures experimental design was used. Thestanding task consisted of standing as still as possible on a force plate for 20 seconds, which was then repeated while theparticipant texted a standard text message (48 characters). The second task consisted of walking along a six metre straight linewhile being filmed posteriorly along the line of progression, and perpendicular to direction of motion. This task was completed againwhile texting a similar predetermined message (48 characters). Balance performance was quantified by the percentage of total timewithin a 5 mm radius of each participant’s centre of pressure (CoP). Gait quality was quantified using the average step length, stridevelocity, and mediolateral standard deviation from midline averaged from both feet. The percentage of time spent within 5 mm of theaverage CoP was significantly (p<0.05) less while texting compared to the non-texting control condition. Additionally, themediolateral standard deviation from the midline while walking increased significantly (p<0.05) in the texting condition. Average steplength and average stride velocity decreased significantly (p<0.05) while texting compared to the control condition. Standing balanceand temporospatial aspects of walking are significantly degraded by texting. These results are valuable due to the growingprevalence of mobile technology. These results suggest that texting and walking could be detrimental to pedestrian safety and canhelp inform decisions regarding infrastructure to minimize potential dangers associated with distracted walkers.
Improving situation awareness of a single human operator interacting with multiple unmanned vehicles: first results

In the context of the supervision of one or several unmanned vehicles by a human operator, the design of an adapted user interface is a major challenge. Therefore, in the context of an existing experimental set up composed of a ground station and heterogeneous unmanned ground and air vehicles we aim at redesigning the human-robot interactions to improve the operator's situation awareness. We base our new design on a classical user centered approach.
Median Nerve Distal Sensory Onset Latency Measurement on The Electrodıagnosıs of Carpal Tunnel Syndrome

Amac: Biz, cinsiyet ve yasin median sinirin 2. parmak uzerinden kaydedilen distal duyusal yanit baslangic latansi (mDL-II) ve aksiyon potansiyeli (mSNAP) amplitudu uzerine olan etkisini incelemeyi, bu degiskenlere gore duzenlenmis esik degerler tablosunun kullanimiyla, mDL-II'nin karpal tunel sendromu (KTS) tanisindaki yanlis tani oraninin azalip azalmayacagini arastirmayi hedefledik. Yontem: Elektronoromiyografi (ENMG) labaratuvarimiza ust ekstremite sinir ileti calismalari icin refere edilmis olan hastalarin kayitlari retrospektif olarak incelendi. Duyusal ileti calismalari; standart supramaksimal uyarim teknigi ile antidromik olarak yapilmisti. mDL-II icin tek esik deger kullanildiginda ve cinsiyet - yasa gore duzenlenmis esik degerler kullanildiginda (sekiz alt grup: erkek/kadin; 16-35 yas, 36-45 yas, 46-55 yas, 55 yasin ustu) elde edilen yanlis pozitif ve yalanci negatif sonuclar ayri ayri saptandi. Bulgular: Calismaya 261 normal ve 279 klinik olarak KTS tanisi almis ekstremite dahil edildi. Normal ekstremitelere ait veriler analiz edildiginde yas arttikca mDL-II'de uzama ve duyusal sinir aksiyon potansiyelinde kuculme saptandi. Ortalama mDL-II degeri kadinlarda erkeklere kiyasla daha kisa iken, amplitud daha yuksekti. mDL-II'nin tum grup icin en iyi esik degeri 2.66 msn idi ve %12.4 yanlis tani oranina sahipti. Cinsiyet - yasa gore duzenlenmis esik degerler tablosunu kullandigimizda elde edilen yanlis sonuc orani %8.3'e dustu (p=0.036). Sonuc: Cinsiyet ve yas; mDL-II degerleri uzerinde belirgin etkilere sahiptirler. Bu calismanin sonuclari, ENMG labartuvarlarinin, mDL-II'yi KTS'nin elektrofizyolojik tanisinda ana bir parametre olarak kullanabilmesi icin, tek bir esik deger kullanmaktan ziyade, cinsiyet ve yas faktorlerine gore duzenlenmis kendi esik degerler tablosunu kullanmalari gerektigini gostermistir
Radiative transfer modeling of dust-coated Pancam calibration target materials: Laboratory visible/near-infrared spectrogoniometry

[1] Laboratory visible/near-infrared multispectral observations of Mars Exploration Rover Pancam calibration target materials coated with different thicknesses of Mars spectral analog dust were acquired under variable illumination geometries using the Bloomsburg University Goniometer. The data were fit with a two-layer radiative transfer model that combines a Hapke formulation for the dust with measured values of the substrate interpolated using a He-Torrance approach. We first determined the single-scattering albedo, phase function, opposition effect width, and amplitude for the dust using the entire data set (six coating thicknesses, three substrates, four wavelengths, and phase angles 3°–117°). The dust exhibited single-scattering albedo values similar to other Mars analog soils and to Mars Pathfinder dust and a dominantly forward scattering behavior whose scattering lobe became narrower at longer wavelengths. Opacity values for each dust thickness corresponded well to those predicted from the particles sizes of the Mars analog dust. We then restricted the number of substrates, dust thicknesses, and incidence angles input to the model. The results suggest that the dust properties are best characterized when using substrates whose reflectances are brighter and darker than those of the deposited dust and data that span a wide range of dust thicknesses. The model also determined the dust photometric properties relatively well despite limitations placed on the range of incidence angles. The model presented here will help determine the photometric properties of dust deposited on the MER rovers and to track the multiple episodes of dust deposition and erosion that have occurred at both landing sites.
An experimental study of multiple zonal jet formation in rotating, thermally driven convective flows on a topographic beta-plane

A series of rotating, thermal convection experiments were carried out on the Coriolis platform in Grenoble, France, to investigate the formation and energetics of systems of zonal jets through nonlinear eddy/wave-zonal flow interactions on a topographic β-plane. The latter was produced by a combination of a rigid, conically sloping bottom and the rotational deformation of the free upper surface. Convection was driven by a system of electrical heaters laid under the (thermally conducting) sloping bottom and led to the production of intense, convective vortices. These were observed to grow in size as each experiment proceeded and led to the development of weak but clear azimuthal jet-like flows, with a radial scale that varied according to the rotation speed of the platform. Detailed analyses reveal that the kinetic energy-weighted radial wavenumber of the zonal jets, kJy, scales quite closely either with the Rhines wavenumber as kJy ≃ 2(βT/2urms)1/2, where urms is the rms total or eddy velocity and βT is t.
Rate of Passage of Digesta in Ruminants; Are Goats Different?

Fluid passage rates through the rumen influence digestion of soluble food nutrients, amount of short-chain fatty acids absorbed in the rumen and that pass out of the rumen, the amount of by-pass protein of dietary origin and the amount of microbial protein available to the host as a protein source, making modelling of passage imperative. Current research on passage rate should seek to incorporate various factors that affect rumen fill, and solid and liquid passage rates to develop intake and passage rate prediction models. The aim of this paper was to discuss factors that affect rates of passage of digesta and rumen digesta load. Ambient temperature, animal physiological status and reproductive status, fermentation and diet quality are major factors affecting digesta passage rates. The animal physiology also influences digesta passage rate. Computation of animal production level to account for all the physiological processes that affect pas- sage rate is vital. Discrepancies on how ambient temperature and particle density (buoy-ancy) affect the passage rate of digesta in the rumen may cause uncertainty in calibration of temperature and buoyancy in prediction models. Corrected for diet properties, goats have similar passage rates to other ruminants.
High Frequency of icaAD, clumping factors A/B, fib and eno Genes in Staphylococcus aureus Species Isolated From Wounds in Tehran, Iran during 2012-2013

Results: The majority of the isolates were resistant to amoxicillin, tetracycline and erythromycin, but all were susceptible to vancomycin and linezolid. Eight (40%) isolates were methicillin resistant and the mecA gene was detected in these isolates. The majority of (90%) of MRSA harbored SCCmec type III, and two isolates harbored type V. The majority (70%, n = 14) of the isolates belonged to agr I, followed by agr II (15%, n = 3), agr IV (10%, n = 2) and agr III (5%, n = 1). The frequencies of clfAB, fnbAB, fib , eno, cna, ebps and bbp genes were 100%, 100%, 65% (n = 13), 55% (n = 11), 70% (n = 14), 70% (n = 14), 55% (n = 11), 0% and 0%, respectively. Conclusions: Half of the isolates were MRSA, the majority of which harbored SCCmec type III. Moreover, most of S. aureus isolates belonged to agrI. The frequency of icaAD, clfAB, fib and eno genes were high in S. aureus species isolated from wounds.
Exploring the critical success factors (CSF) and limitations of enterprise resource planning (ERP) systems: the case of Egyptian hotels.

In recent times, service establishments have invested considerable resources in the implementation of Enterprise Resource. Enterprise resource planning (ERP) systems are highly complex information systems. Many ERP implementations have been classified as failures because they did not believe in the importance of the key success factors of achieving a competitive advantage. This paper has the objective of getting insight into the major Critical Success Factors (CSFs) and limitations of the ERP systems, particularly in the sector of hospitality industry, through the five-star hotels located in Egypt. A self- administered questionnaire was distributed to the directors of information technology in 140 five- star hotels. The survey instrument incorporated three sections; the first depicted demographics of the respondents, the second investigating the most critical success factors; and the third included open questions to explore the ERP limitations. The findings revealed that “Clear understanding of strategic goals” was the lowest perceived factor. While, others such as "Appropriate ERP consultants, avoidance of software changes, confirmation of finalized solutions, extensive employees’ training/education and involvement of project team members” were the highly perceived critical success factors of implementing ERP system in Egyptian hotels. There is no ERP that could cover all the hotel processes. This paper fulfils an identified need to study the most CSFs of implementing ERP system in Egyptian Hotel enterprises for managing the introduction and implementation of an ERP system with acceptable probability of success. Egyptian hotel managers can benefit from a deeper understanding of the issues related to those major CSFs. This study is considered a primary stride in understanding the ERP systems in Egyptian hotels. Key words: Enterprise resource planning, ERP systems, critical success factors (CSFs), hotels, Egypt.
Physiological Indices of Stress in Mytilus Edulis

In nature, organisms are subjected to a variety of environmental factors acting together and they respond to the total resulting stimulus rather than to single environmental variables. In addition, the animal's response is not in terms of individual physiological rates but rather as a whole organism. Therefore an experimental approach to an animal's response to a complex environment could usefully include (a) multivariate experiments and (b) integration of individual physiological processes to provide a greater under-standing of the ‘whole organism’ response. In this paper, non-linear multiple regression equations and response surfaces are used to describe and illustrate the combined effects on the common mussel, Mytilus edulis L. , of body size, ration and season on physio-logical integrations such as the scope for growth, growth efficiency and the oxygen: nitrogen ratio (reviewed by Bayne, 1975; Bayne, Widdows & Thompson, 1976). The data used to compute these physiological integrations are derived from a series of multivariate experiments described in a preceding paper (Widdows, 1978).
Market Response toward Accrual Earnings Management, Real Transactions, and Strategic Revenue Recognition - Earnings Management1

This study investigates how the capital market response to a variety of earnings management tools i.e., accrual-based earnings management, real transaction activities, and strategic revenue recognition. We measure the market response to the information content of earnings by the earnings response coefficient (ERC). By using pooled-OLS regression from 748 firm-years data of public listed companies on the Indonesian Stock Exchange (IDX) in 2004-2009, we find some evidence of a negative association between earnings response coefficients and information content of earnings that contained earnings management. Our study find that real transactions earnings management in operating activities has negative association with earnings response coefficient, but we do not find any evidence from the other earnings management tools. The findings of this study imply that the market participants are able to capture a certain kind of earnings management behaviour that may reduce the earnings response coefficient.
An overview of the hepatoprotective potentials of Phyllanthus amarus

The liver played a crucial role in the metabolism of toxins from the body thereby predisposing it to challenges that impedes its optimum performance. P. amarus Schum & Thonn (Euphorbiaceae) is a small erect, annual herb that contain various phytochemicals that are attributed to its leaves, stem, and roots. It is a hepatoprotective herb that has been used in folk medicine for various liver disorders, and this property has been attributed to its active compounds mainly phyllanthin. The present study is a review of the hepatoprotective activity of the plant and the mechanisms that might play significant role. Several studies have indicated that the stone-breaker plant possess remarkable hepatoprotective and antihepatotoxic potentials against liver toxicity models such as acetaminophen, alcohol, and carbon tetrachloride. The suggested mechanism relates principally to the phytochemical lignan phyllanthin which exhibit antioxidant effect against the oxidative stress generated by the hepatotoxins.