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Supervised machine learning models are trained on experimental data to predict the mechanical properties of composite materials. Results show that these techniques are reasonably accurate and generalizable.

Forskning på arbeidsrelatert helse er opptatt av å identifisere, behandle og forebygge stress i individer forårsaket av forhold på arbeidsplassen. Occupational Depression Inventory (ODI) er et verktøy for å kartlegge arbeidsrelaterte depressive symptomer, og er utviklet for å legge til rette for omfattende og effektive intervensjoner i helsefremmende arbeid i arbeidslivet. Denne oppgaven har undersøkt hvorvidt ODI passer til den norske konteksten, med mål om å validere ODI i Norge og lære mer om korrelasjonene til arbeidsrelatert depresjon. Denne studien inkluderte 485 norske arbeidstakere. Dataene ble innsamlet med et selvadministrert internettbasert spørreskjema. "Maximum Likelihood"-faktoriseringsteknikken fra "Exploratory Factor Analysis" (EFA) indikerte unidimensjonalitet, mens Cronbach's α og McDonald’s ω indikerte at ODI utviser sterk reliabilitet. Pearsons korrelasjonskoeffisient ble brukt for å undersøke ODIs kriterievaliditet og diskriminante validitet. Som hypotetisert korrelerte variablene i forventede retninger, og støttet dermed ODIs kriterievaliditet. I forhold til den diskriminante validiteten viste ODI en tilfredsstillende assossiasjon til en årsaksnøytral depresjonsskala. Forventningen om at selvmordstanker ville være ODI-komponenten med minst oppslutning fikk støtte. For å oppsummere bekreftet analysene hypotesene og viste at ODI har robuste strukturelle og psykometriske egenskaper i den norske konteksten. Eksisterende litteratur ble brukt for å oppnå en bredere forståelse av tilstanden i fagfeltet. Funnene indikerte, i tråd med tidligere valideringsstudier, at ODI kan stoles på i kliniske utredninger av arbeidsrelatert stress. Likevel burde fremtidig forskning bruke representative utvalg for å produsere generaliserbare funn og samle mer utfyllende data på korrelasjonene rundt arbeidsrelatert depresjon. The research area of occupational health is invested in identifying, treating and preventing distress in individuals resulting from conditions at work. The Occupational Depression Inventory (ODI) is an instrument for assessing work-related depressive symptoms, developed to facilitate comprehensive and effective interventions in occupational health practices. In this thesis, the fit of the ODI in the Norwegian context has been explored, with the aims of validating the ODI in Norway and learn more about the correlates of occupational depression. This study involved 485 Norwegian employees. The data was collected with a self-administered online questionnaire. The Maximum Likelihood factoring technique of Exploratory Factor Analysis (EFA) indicated unidimensionality, while Cronbach’s α and McDonald’s ω demonstrated the ODI to have strong reliability. Pearson’s correlation coefficient was utilized to examine the criterion validity and discriminant validity of the ODI. As hypothesized, the variables correlated in the expected directions, supporting the criterion validity of the ODI. In regard to the discriminant validity, the ODI’s association with a cause-neutral depression scale was satisfactory. The anticipation of the suicidal ideation item to be the least frequently endorsed was also met. In summary, the analyses confirmed the hypotheses and found the ODI to exhibit robust structural and psychometric properties in the Norwegian context. Existing literature was utilized to gain a broader understanding of the state of the art. Consistent with earlier validation research, the findings suggest the ODI can be relied on in clinical assessments of work-related distress. However, further research should use representative samples to produce generalizable findings and gather more in-depth data on the correlates of occupational depression.

Regular convolutions of arithmetical functions were first defined by Narkiewicz (Colloq Math 10:81–94, 1963). Useful identities regarding generalizations of the totient-counting function and Ramanujan sums were later proven for regular convolutions by McCarthy (Port Math 27(1):1–13, 1968) and Rao (Studies in arithmetical functions, PhD thesis, 1967). We introduce semi-regular convolutions as a generalization of the regular convolutions and show that many of these identities still hold. In particular, special cases of the generalized Ramanujan sums correspond to the corresponding expected generalizations of the totient-counting and Mobius functions. Then we demonstrate that the class of semi-regular convolutions is the broadest generalization to multiplicative-preserving convolutions possible in which even the most basic of these identities still hold. Finally, we introduce a convolution related to Cohen’s infinitary convolution (Int J Math Math Sci 16(2):373–383, 1993) that is semi-regular. This convolution has never been studied to the best of the authors’ knowledge and possesses a property that distinguishes it from all of the other semi-regular convolutions.

We consider a generalized type of unique factorization of the positive integers with restrictions on the exponents and view them as a family of arithmetic convolutions and divisibility relations, similar to the convolutions defined by Narkewicz [On a class of arithmetical convolutions, Colloq. Math. 10 (1963) 81–94]. We introduce special types of multiplicativity corresponding to these convolutions, and discuss algebraic properties of the associated arithmetic convolutions and analogs of the Möbius functions. We also prove asymptotics for analogs of the totient function, totient summatory function, and divisor summatory function.

Single crystals of Ln2Fe4- xCo xSb5- yBi y (Ln = La, Ce; 0 ≤ x < 0.5; 0 ≤ y ≤ 0.2) were grown using Bi flux and self-flux methods. The compounds adopt the La2Fe4Sb5 structure type with tetragonal space group I4/ mmm. The La2Fe4Sb5 structure type is comprised of rare earth atoms capping square Sb nets in a square antiprismatic fashion and two transition-metal networks forming a PbO-type layer with Sb and transition-metal isosceles triangles. Substituting Co into the transition-metal sublattice results in a decrease in the transition temperature and reduced frustration, indicative of a transition from localized to itinerant behavior. In this manuscript, we demonstrated that Bi can be used as an alternate flux to grow single crystals of antimonides. Even with the incorporation of Bi into the Sb square net, the magnetic properties are not significantly affected. In addition, we have shown that the incorporation of Co into the Fe triangular sublattice leads to an itinerant magnetic system.

Fishponds are anthropogenic aquatic ecosystems where biodiversity is shaped by fish farming practices. Little is known on the consequences of fish farming cessation. This study describes the variation of species richness in breeding birds and Odonates, between ponds either managed for fish farming, or abandoned, for 4-10 years or > 10 years, in Sologne (Centre Val-de-Loire region, central France). Bird species richness was primarily favoured by the extent of littoral helophyte belts but this positive effect was not recorded in ponds without fish farming for more than ten years. Four species : the Pochard Aythya ferina, the Tufted Duck Aythya fuligula, the Black-necked Grebe Podiceps nigricollis and the Sedge Warbler Acrocephalus schoenobaenus were more frequently found in ponds still stocked with Carp Cyprinus carpio. Three of them were benthivorous divers. We hypothesized that this could reflect a carp effect on the ecosystem productivity. Our results therefore suggest that fish farming demise may be detrimental to birds even though adequate nesting sites remain available. It should be emphasized however that fish farming productivity is low in Sologne (≤ 150 kg/ ha). Our observations therefore could not be extrapolated to fish ponds with intensive fish farming. Odonate richness seems to depend on the development of low emergent vegetation. The absence of carp stocking did not correlate with higher frequency for any species. Conservation of low helophyte belts then seems to be the proper management to meet Odonate requirements., Conséquences de la déprise piscicole sur la richesse spécifique des oiseaux et des Odonates dans des étangs de pisciculture français. Les étangs piscicoles sont des écosystèmes artificiels au sein desquels la biodiversité a été modelée par la pisciculture traditionnelle. Les conséquences d’une déprise piscicole y ont été peu étudiées. Ce travail décrit la variabilité de la richesse spécifique des oiseaux nicheurs et des Odonates, sur des étangs 1) encore gérés par des pisciculteurs, 2) abandonnés depuis 4-10 ans, ou 3) abandonnés depuis plus de 10 ans, en Sologne (région Centre Val-de-Loire ; départements : Cher, Loir-et-Cher, Loiret). La richesse de l’avifaune s’avère être principalement favorisée par le développement des ceintures de végétation aquatique, mais cet effet positif n’a pas été constaté sur les étangs abandonnés depuis plus de dix ans. Quatre espèces, le Fuligule milouin Aythya ferina, le Fuligule morillon Aythya fuligula, le Grèbe à cou noir Podiceps nigricollis et le Phragmite des joncs Acrocephalus schoenobaenus ont été plus fréquemment trouvées sur les étangs encore gérés pour la pisciculture. Trois d’entre elles sont des benthivores, ce constat pouvant refléter un effet de la présence des Cyprinidés sur la productivité primaire de l’écosystème aquatique. Nos résultats suggèrent donc que la déprise piscicole peut être défavorable à l’avifaune, même si des sites de nidification a priori accueillants sont disponibles. Mais l’on doit souligner que les étangs solognots sont de faible productivité piscicole (≤ 150 kg/ ha). Nos observations ne sauraient donc être extrapolées à des étangs de pisciculture intensive. La richesse en Odonates semble dépendre de l’étendue des formations végétales riveraines peu élevées. Aucune des espèces observées ne semble être favorisée par l’absence de Cyprinidés. La préservation des ceintures d’hélophytes bas suffit à maintenir la richesse des étangs, indépendamment de la présence/absence de la pisciculture., Broyer Joël,Richier Sylvain,Renaud Christophe,Riotton-Roux Bruno,Vade Jean-Yves. Consequences of fish farming demise for bird and odonate species richness in french fishponds . In: Revue d'Écologie (La Terre et La Vie), tome 73, n°4, 2018. pp. 462-473.

Global bifurcation and spatio-temporal patterns of periodic solutions (with prescribed period) to second order reversible equivariant autonomous systems with commensurate delays are studied using the Brouwer/Leray–Schauder [Formula: see text]-equivariant degree theory. Here, [Formula: see text] is related to the reversal symmetry combined with the autonomous form of the system, [Formula: see text] reflects extra spacial symmetries of the system, and [Formula: see text] is related to the oddness of the right-hand side. Abstract results are supported by a concrete example with [Formula: see text] — the dihedral group of order 12.

Objective The purpose of this study was to analyze the utility of MRA-H in adolescents by comparing the results of imaging with surgical findings and/or clinical outcome. Material and methods After obtaining appropriate IRB approval, the Radiologic Information System database was queried for all patients 13–18 years of age who underwent MRA-H from 2004 through 2013. The electronic medical record was reviewed for clinical history, clinical examination findings, and operative notes. MRA-H images were reviewed for soft tissue abnormalities (labral tear, paralabral ganglion, articular cartilage loss, synovitis, ligament tears) and bony abnormalities (cam-type femoroacetabular impingement (FAI), pincer-type FAI, hip dysplasia). MRA-H findings were correlated with surgical findings and with clinical outcomes. Results Twenty-six patients with labral tears by MRA-H were included in study and grouped as follows: Group I) patients who underwent surgical management (n = 10); group II) patients managed non-surgically (medication, intra-articular injection, physical therapy) (n = 9); group III) patients lost to follow up after being advised to have surgery (n = 7). With regard to presenting symptomatology, 87.5% of patients with labral tear had groin pain. Of those patients who were diagnosed with a labral tear, 52% were categorized as idiopathic labral tears, 26% as secondary tears (secondary to abnormal bony morphology), and 22% as traumatic labral tears. The labral tears were found to be anterior in 61% and posterior in 22%. Associated articular cartilage lesions were found in 29% of patients. In group I (surgical patients), MRA-H labral findings were confirmed at surgery in 9/10. Seventy percent of labral tears in our study had some form of abnormal bony morphology. Nine of the 12 patients with bone abnormalities were derived from group I patients. Six out of 7 patients with cam-type FAI had a labral tear. Conclusion Labral tears diagnosed by MRA-H in the adolescent population correlated well with clinical examination and surgical findings. Also, MRA-H contributed by defining bony morphology that was directly applied to surgical management. Non-surgical management of labral tears diagnosed on MRA-H had a generally favorable outcome.

Single crystals of Pr2Fe4–xCoxSb5 (1 < x < 2.5) were grown from a Bi flux and characterized by X-ray diffraction. The compounds adopt the La2Fe4Sb5 structure type (I4/mmm). The structure of Pr2Fe4–xCoxSb5 (1 < x < 2.5) contains a network of transition metals forming isosceles triangles. The x ∼ 1 analogue is metallic and exhibits a magnetic transition at T1 ≈ 25 K. The magnetic moment obtained from the Curie–Weiss fit is 11.49(4) μB, which is larger than the spin-only Pr3+ moment. The x ∼ 2 analogue orders magnetically at T1 ≈ 80 and T2 ≈ 45 K. This is the first case of the substitution of Co into the La2Fe4Sb5 structure type, evidenced by the increased concentration of dopant with decreased lattice parameters coupled with a change in the transition temperature with a change in the cobalt concentration. The added complexity in the magnetic behavior of the x ∼ 1 and 2 analogues indicates that the increased concentration of Co invokes an additional magnetic contribution of the transition metal in the sublat...

Sarcomas are rare connective tissue malignancies. Patients and their families often experience many challenging problems during the cancer journey. Professionals working in this complex landscape need to collaborate to optimize patient outcomes.

Este artículo se encuentra disponible en la siguiente URL: https://www.mdpi.com/2306-7381/5/3/64/htm A six-year-old female goat was presented to the veterinary teaching hospital of the University of the West Indies with a history of progressive hind-limb paresis lasting two weeks. The doe developed a grade 6/6 holosystolic murmur during hospitalisation. Echocardiography revealed vegetative growths attached to cusps of the mitral and aortic valves. Therewas an accelerated aortic flow at 2.9 m/s and aortic insufficiency. The aortic vegetation was prolapsing into the left ventricle during diastole, causing it to contact the septal mitral valve leaflet. A diagnosis of mitral and aortic vegetative endocarditis, with a mitral kissing vegetation and mild aortic stenosis, was reached. The patient was placed on broad-spectrum antimicrobials. A short-term follow-up showed no resolution of clinical signs, and the animal eventually died. Post-mortem examination showed severe vegetative, fibrino-necrotic, aortic and mitral valve lesions. The goat also had a severe fibrino-suppurative mastitis. Histopathology confirmed the lesions to be vegetative endocarditis.

Single crystals of LnCo2Al8 (Ln = La–Nd, Sm, Yb) were grown via the metal-flux growth technique and characterized by single crystal X-ray diffraction. LnCo2Al8 adopts the CaCo2Al8-structure type with space group Pbam and unit cell dimensions of a ≈ 12.4 A, b ≈ 14.4 A, and c ≈ 4.0 A. The unit cell volume of LnCo2Al8 (Ln = La–Nd, Sm, Yb) systematically decreases as a function of rare earth, consistent with the lanthanide contraction, except for YbCo2Al8, indicating a divalent Yb2+ state. LnCo2Al8 (Ln = Ce, Pr, Nd) show high temperature Curie–Weiss paramagnetism, and LnCo2Al8 (Ln = Pr, Nd) orders magnetically at TN = 5.6 and 8.7 K, with a fluctuating moment consistent with the trivalent oxidation state of the lanthanides. LnCo2Al8 (Ln = La–Nd, Sm, Yb) are metallic, with CeCo2Al8 having a residual resistivity ratio (RRR) of 20. We present the crystal growth, structural, magnetic, and electrical properties of single crystalline LnCo2Al8 (Ln = La–Nd, Sm, Yb).