Investigation of Superconducting Gap Structure in HfIrSi using muon spin relaxation/rotation

Appearance of strong spin-orbit coupling (SOC) is apparent in ternary equiatomic compounds with 5$d$-electrons due to the large atomic radii of transition metals. SOC plays a significant role in the emergence of unconventional superconductivity. Here we examined the superconducting state of HfIrSi using magnetization, specific heat, zero and transverse-field (ZF/TF) muon spin relaxation/rotation ($\mu$SR) measurements. Superconductivity is observed at $T_\mathrm{C}$ = 3.6 K as revealed by specific heat and magnetization measurements. From the TF$-\mu$SR analysis it is clear that superfluid density well described by an isotropic BCS type $s$-wave gap structure. Furthermore, from TF$-\mu$SR data we have also estimated the superconducting carrier density $n_\mathrm{s}$ = 6.6 $\times$10$^{26}$m$^{-3}$, London penetration depth $\lambda_{L}(0)$ = 259.59 nm and effective mass $m^{*}$ = 1.57 $m_{e}$. Our zero-field muon spin relaxation data indicate no clear sign of spontaneous internal field below $T_\mathrm{C}$, which implies that the time-reversal symmetry is preserved in HfIrSi. Theoretical investigation suggests Hf and Ir atoms hybridize strongly along the $c$-axis of the lattice, which is responsible for the strong three-dimensionality of this system which screens the Coulomb interaction. As a result despite the presence of correlated $d$-electrons in this system, the correlation effect is weakened, promoting electron-phonon coupling to gain importance.Comment: 8 pages, 4 figure

PENGARUH MOTIVASI RENDAH BIAYA DAN KEPEMIMPINAN TERHADAP KOMITMEN KERJA

ABSTRACT The stanting problem in North Central Timor Regency has increased.  The data shows that the highest number is at the Manumean Health Center at 28.3% and the lowest at the Lurasik Health Center at 19.7%.  This is indicated due to weak work commitment.  This study aims to determine the partial and simultaneous effect of low-cost motivational variables (X1) and leadership variables (X2) on work commitment to the stunting reduction acceleration team in TTU Regency.  This study focuses on all teams for the acceleration of stanting reduction and in the field of family health and nutrition at the TTU District Health Office with a total of 40 respondents.  The data analysis technique used is inferential analysis.  The results of inferential analysis show that the low-cost motivation variable (X1) has a significant influence on work commitment (Y).  The leadership variable (X2) has a significant effect on work commitment (Y).  Meanwhile, the low cost motivation variable (X1) and the leadership variable (X2) simultaneously have a significant effect on work commitment. Keywords: Low Cost Motivation, Leadership, and Work Commitmen

ANALISIS PERTUMBUHAN DAN PENYAKIT ICE-ICE PADA RUMPUT LAUT JENIS Kappaphycus alvarezii (Doty) Doty HASIL KULTUR JARINGAN YANG DIBUDIDAYA DENGAN METODE YANG BERBEDA DI PERAIRAN TABLOLONG

Abstrak - Budidaya rumput laut Kappaphycus alvarezii telah dimulai di Perairan Tablolong sejak 1999 dan berkembang pesat.  Masalah muncul dan menurunkan produksi rumput laut di Desa Tablolong sejak munculnya fenomena penyakit ice-ices sejak sekitar tahun 2007.  penelitian ini bertujuan untuk menganalisis pertumbuhan dan insiden penyakit pada rumput laut Kappaphycus alvareziii hasil kultur jaringan yang  dibudidaya dengan metode yang berbeda di Perairan Tablolong. Sampel penelitian adalah Kappahycus alvarezii hasil kultur jaringan yang dibudidaya di perairan Desa Pukuafu, Rote. Penelitian dilakukan pada September-November 2020.  Metode yang digunakan adalah metode eksperiman budidaya di lapangan dengan menggunakan metode lepas Dasar dan Longline. Data diambil setiap minggunya selama 7 minggu pemeliharaan.  Data yang diambil adalah berat basah dan pengamatan serta perhitungan terhadap insiden penyakit ice-ice. Analisis data dilakukan dengan menghitung pertumbuhan spesifik, pertumbuhan absolut dan insiden penyakit.Hasil penelitian menunjukan bahwa untuk pertumbuhan spesifik berkisar antara 0,82-7,65% per hari.  Metode Longline memberikan pertumbuhan spesifik yang lebih baik (rata-rata 3,73% per hari) dibandingkan metode lepas dasar (rata-rata 3,18%).  Untuk pertumbuhan absolut, metode longline memberikan hasil yang lebih baik yaitu 522,5 gr, dibandingkan metode lepas dasar, 374,5 gr.  Terkait dengan penyakit ice-ice, tanaman mulai terinfeksi sejak minggu pertama hingga akhir pemeliharaan, dengan puncaknya pada minggu keenam.  Metode longline memberikan insiden penyakit yang lebih rendah (rata-rata 49,98%) dibandingkan dengan metode lepas dasar (rata-rata 45,72%)     Kata Kunci :  Pertumbuhan, ice-ice, Kappaphycus alvarezii, Metode Longline, Metode Lepas Dasar.&nbsp

Characterization of microflora in Latin-style cheeses by next-generation sequencing technology

Background Cheese contamination can occur at numerous stages in the manufacturing process including the use of improperly pasteurized or raw milk. Of concern is the potential contamination by Listeria monocytogenes and other pathogenic bacteria that find the high moisture levels and moderate pH of popular Latin-style cheeses like queso fresco a hospitable environment. In the investigation of a foodborne outbreak, samples typically undergo enrichment in broth for 24 hours followed by selective agar plating to isolate bacterial colonies for confirmatory testing. The broth enrichment step may also enable background microflora to proliferate, which can confound subsequent analysis if not inhibited by effective broth or agar additives. We used 16S rRNA gene sequencing to provide a preliminary survey of bacterial species associated with three brands of Latin-style cheeses after 24-hour broth enrichment. Results Brand A showed a greater diversity than the other two cheese brands (Brands B and C) at nearly every taxonomic level except phylum. Brand B showed the least diversity and was dominated by a single bacterial taxon, Exiguobacterium, not previously reported in cheese. This genus was also found in Brand C, although Lactococcus was prominent, an expected finding since this bacteria belongs to the group of lactic acid bacteria (LAB) commonly found in fermented foods. Conclusions The contrasting diversity observed in Latin-style cheese was surprising, demonstrating that despite similarity of cheese type, raw materials and cheese making conditions appear to play a critical role in the microflora composition of the final product. The high bacterial diversity associated with Brand A suggests it may have been prepared with raw materials of high bacterial diversity or influenced by the ecology of the processing environment. Additionally, the presence ofExiguobacterium in high proportions (96%) in Brand B and, to a lesser extent, Brand C (46%), may have been influenced by the enrichment process. This study is the first to define Latin-style cheese microflora using Next-Generation Sequencing. These valuable preliminary data will direct selective tailoring of agar formulations to improve culture-based detection of pathogens in Latin-style cheese

Perturbation theory of the space-time non-commutative real scalar field theories

The perturbative framework of the space-time non-commutative real scalar field theory is formulated, based on the unitary S-matrix. Unitarity of the S-matrix is explicitly checked order by order using the Heisenberg picture of Lagrangian formalism of the second quantized operators, with the emphasis of the so-called minimal realization of the time-ordering step function and of the importance of the $\star$-time ordering. The Feynman rule is established and is presented using $\phi^4$ scalar field theory. It is shown that the divergence structure of space-time non-commutative theory is the same as the one of space-space non-commutative theory, while there is no UV-IR mixing problem in this space-time non-commutative theory.Comment: Latex 26 pages, notations modified, add reference

Search for Millicharged Particles at SLAC

Particles with electric charge q < 10^(-3)e and masses in the range 1--100 MeV/c^2 are not excluded by present experiments. An experiment uniquely suited to the production and detection of such "millicharged" particles has been carried out at SLAC. This experiment is sensitive to the infrequent excitation and ionization of matter expected from the passage of such a particle. Analysis of the data rules out a region of mass and charge, establishing, for example, a 95%-confidence upper limit on electric charge of 4.1X10^(-5)e for millicharged particles of mass 1 MeV/c^2 and 5.8X10^(-4)e for mass 100 MeV/c^2.Comment: 4 pages, REVTeX, multicol, 3 figures. Minor typo corrected. Submitted to Physical Review Letter

Incidence of seizures following initial ischemic stroke in a community-based cohort: The Framingham Heart Study

Purpose We examined the incidence of seizures following ischemic stroke in a community-based sample. Methods All subjects with incident ischemic strokes in the Framingham Original and Offspring cohorts between 1982 and 2003 were identified and followed for up to 20 years to determine incidence of seizures. Seizure-type was based on the 2010 International League Against Epilepsy (ILAE) classification. Disability was stratified into mild/none, moderate and severe, based on post-stroke neurological deficit documentation according to the Framingham Heart Study (FHS) protocol and functional status was determined using the Barthel Index. Results An initial ischemic stroke occurred in 469 subjects in the cohort and seizures occurred in 25 (5.3%) of these subjects. Seizure incidence was similar in both large artery atherosclerosis (LAA) (6.8%) and cardio-embolic (CE) (6.2%) strokes. No seizures occurred following lacunar strokes. The predominant seizure type was focal seizure with or without evolution to bilateral convulsive seizure. One third of participants had seizures within the first 24 h from stroke onset and half of all seizures occurred within the first 30 days. On multivariate analysis, moderate and severe disability following stroke was associated with increased risk of incident seizure. Conclusions Seizures occurred in approximately 5% of subjects after an ischemic stroke. One third of these seizures occurred in the first 24 h after stroke and none followed lacunar strokes. Focal seizures with or without evolution in bilateral convulsive seizures were the most common seizure type. Moderate and severe disability was predictive of incident seizures

Interobserver Agreement in the Diagnosis of Stroke Type

Interobserver Agreement is Essential to the Reliability of Clinical Data from Cooperative Studies and Provides the Foundation for Applying Research Results to Clinical Practice. in the Stroke Data Bank, a Large Cooperative Study of Stroke, We Sought to Establish the Reliability of a Key Aspect of Stroke Diagnosis: The Mechanism of Stroke. Seventeen Patients Were Evaluated by Six Neurologists. Interobserver Agreement Was Measured When Diagnosis Was based on Patient History and Neurologic Examination Only, as Well as When It Was based on Results of a Completed Workup, Including a Computed Tomographic Scan. Initial Clinical Impressions, based Solely on History and One Neurologic Examination, Were Fairly Reliable in Establishing the Mechanism of Stroke (Ie, Distinguishing among Infarcts, Subarachnoid Hemorrhages, and Parenchymatous Hemorrhages). Classification into One of Nine Stroke Subtypes Was Substantially Reliable When Diagnoses Were based on a Completed Workup. Compared with Previous Findings for the Same Physicians and Patients, the Diagnosis of Stroke Type Was Generally More Reliable Than Individual Signs and Symptoms. These Results Suggest that Multicentered Studies Can Rely on the Independent Diagnostic Choices of Several Physicians When Common Definitions Are Employed and Data from a Completed Workup Are Available. Furthermore, Reliability May Be Less for Individual Measurements Such as Signs or Symptoms Than for More-Complex Judgments Such as Diagnoses. © 1986, American Medical Association. All Rights Reserved

Interobserver Reliability in the Interpretation of Computed Tomographic Scans of Stroke Patients

Interobserver Reliability in Interpretation of Computed Tomographic Images Was Studied by Six Senior Neurologists Who Independently Evaluated on a Standardized Stroke Data Bank Form the Brain Lesions of 17 Patients. the Results Analyzed with K Statistics Yielded Moderate to Substantial Agreement on Most Items of Interest Including the Stroke Pathology and Anatomy. in General, the Levels of Agreement Were as High as Previously Reported for the Diagnosis of the Mechanism of the Stroke, and Much Higher Than on Many Stroke History Items and Items of Neurologic Examination. Excellent Agreement Was Obtained for the Detection of Infarcts and Intracerebral Hemorrhage, and Substantial Agreement Was Obtained on Whether the Computed Tomographic Images Were Normal or Indicative of Small Deep Infarcts, Superficial and Deep Infarcts, and Aneurysms. the Level of Agreement on Anatomy of the Lesions Was Best for the Frontal, Parietal, and Temporal Lobes, Putamen, Cerebellum, and Subarachnoid Space. Implications for Clinical Research and Diagnosis Are Discussed. © 1987 American Medical Association All Rights Reserved