Factorization and resummation of s-channel single top quark production

In this paper we study the factorization and resummation of s-channel single top quark production in the Standard Model at both the Tevatron and the LHC. We show that the production cross section in the threshold limit can be factorized into a convolution of hard function, soft function and jet function via soft-collinear-effective-theory (SCET), and resummation can be performed using renormalization group equation in the momentum space resummation formalism. We find that in general, the resummation effects enhance the Next-to-Leading-Order (NLO) cross sections by about $3$ at both the Tevatron and the LHC, and significantly reduce the factorization scale dependence of the total cross section at the Tevatron, while at the LHC we find that the factorization scale dependence has not been improved, compared with the NLO results.Comment: 29 pages, 7 figures; version published in JHE

Single-top t-channel hadroproduction in the four-flavour scheme with POWHEG and aMC@NLO

We present results for the QCD next-to-leading order (NLO) calculation of single-top t-channel production in the 4-flavour scheme, interfaced to Parton Shower (PS) Monte Carlo programs according to the POWHEG and MC@NLO methods. Comparisons between the two methods, as well as with the corresponding process in the 5-flavour scheme are presented. For the first time results for typical kinematic distributions of the spectator-b jet are presented in an NLO+PS approach.Comment: 16+1 pages, 8 figures, matches version accepted for publication in JHE

Internal market orientation in law firms– evaluation of internal marketing techniques used for talent retention, job satisfaction and competitive advantage.

This management project intends to assess the level and the outcome of internal market orientation in law firms and the various internal marketing techniques used by law firms in order to maintain a satisfied workforce and fight the obstacles of employee retention. For the purpose of this project, eight law firms of roughly the same size and operating in the same area have been interviewed about their internal market orientation and their views on employee motivation. In the course of the project, it will be examined in how far the marketing and human resource departments within these law firms are actually working together compared to the dimension in which they should or could work together in order to produce synergy effects for a successful workplace design. Especially the definition of adequate financial and non-financial incentives to motivate employees and successful designs of such incentive schemes which may be used to motivate employees to stay with the firm and to go the extra mile in delivering added value to clients will be under scrutiny. It will further be examined in how far both the firms and their employees benefit from entering into long-term high-value employment relationships with each other and whether the establishment of an internal market orientation may lead to a sustainable competitive advantage for the law firms

EFEKTIVITAS ARANG AKTIF TEMPURUNG KELAPA DAN RESIN TERHADAP PENURUNAN KESADAHAN DAN KEKERUHAN AIR SUMUR GALI DI DESA SAMBIROTO PRACIMANTORO WONOGIRI

Abstrak Air merupakan kebutuhan dasar bagi manusia yang harus tersedia dalam kuantitas dan kualitas yang memenuhi syarat. Menurut Permenkes RI Nomor 416/Menkes/Per/IX/1990 kadar maksimum yang diperbolehkan untuk kesadahan sebesar 500mg/L dan kekeruhan sebesar 25 NTU. Tujuan penelitian ini adalah mengetahui perbedaan efektivitas penggunaan jenis media arang aktif tempurung kelapa dan resin terhadap penurunan kesadahan dan kekeruhan dalam air sumur gali. Jenis penelitian ini adalah penelitian Eksperimen dengan desain penelitian “Pre test-Post test with Control Group” dan perlakuan tiga kali pengulangan. Objek penelitian ini adalah sumur gali milik Bapak Suroto di Desa Sambiroto,Pracimantoro, Wonogiri dengan kadar kesadahan sebesar 498,4 mg/L. Variabel bebas pada penelitian ini adalah jenis media arang aktif tempurung kelapa dan resin dengan tebal masing-masing 60 cm. Variabel terikat dalam penelitian ini yaitu kesadahan dan kekeruhan air pada air sumur gali. Hasil dari pemeriksaan kesadahan pre 520 mg/L, untuk jenis media arang aktif tempurung kelapa post 1 72 mg/L, post 2 68 mg/L, post 3 66 mg/L, rata-rata 68,67 mg/L dan presentase penurunan 86,67% dan untuk jenis media resin post 1 43 mg/L, post 2 41 mg/L, post 3 35 mg/L, rata-rata 39,67 mg/L, presentase penurunan 92,33%. Pre kekeruhan 30,6 NTU, untuk jenis media arang aktif tempurung kelapa post 1 1,37 NTU, post 2 1,29 NTU, post 3 1,12 NTU, rata-rata 1.26 NTU, presentase penurunan 95,87%, untuk jenis media resin post 1 1,44 NTU, post 2 1,37 NTU, post 3 1,29 NTU, rata-rata 1,37 dan presentase penurunan 95,33%. Hasil uji One Way Anova of Variance kedua parameter didapatkan nilai Sig. 0,000 yang mana dapat disimpulkan bahwa terdapat perbedaan kemampuan menurunkan tingkat kesadahan dan kekeruhan pada masing-masing jenis media. Kata Kunci : Filtrasi, Arang Aktif, Tempurung Kelapa, Resin, Kesadahan, Kekeruhan

Context-dependent parasite infection affects trophic niche in populations of sympatric stickleback species

How parasites alter host feeding ecology remains elusive in natural populations. A powerful approach to investigate the link between infection and feeding ecology is quantifying unique and shared responses to parasite infection in related host species within a common environment. Here, 9 pairs of sympatric populations of the three-spined and nine-spined stickleback fishes were sampled across a range of freshwater and brackish habitats to investigate how parasites alter host feeding ecology: (i) biotic and abiotic determinants of parasite community composition, and (ii) to what extent parasite infection correlates with trophic niche specialization of the 2 species, using stable isotope analyses (δ15N and δ13C). It was determined that parasite community composition and host parasite load varied among sites and species and were correlated with dissolved oxygen. It was also observed that the digenean Cyathocotyle sp.'s abundance, a common directly infecting parasite with a complex life cycle, correlated with host δ13C in a fish species-specific manner. In 6 sites, correlations were found between parasite abundance and their hosts' feeding ecology. These effects were location-specific and occasionally host species or host size-specific. Overall, the results suggest a relationship between parasite infection and host trophic niche which may be an important and largely overlooked ecological factor. The population specificity and variation in parasite communities also suggest this effect is multifarious and context-dependent.status: publishe

Cr(VI) Removal from Aqueous Solution Using a Magnetite Snail Shell

© 2020, Springer Nature Switzerland AG. In this study, magnetic snail shell (MSS) prepared by impregnating of iron oxide onto snail shell (SS) powder was used for removing Cr(VI) from aqueous solution. Among six different mass ratios of Fe/SS powder studied, the MSS25 produced at a ratio of 25% achieved the highest Cr(VI) adsorption capacity. Batch adsorption experiments were conducted to investigate the adsorption isotherm, kinetics, and mechanism of Cr(VI) onto MSS25. The results illustrated that adsorption of Cr(VI) onto MSS25 reached equilibrium after 150 min at pH 3. The adsorption kinetics could be well described by the pseudo-second order model (R2 = 0.986). The Langmuir model (R2 = 0.971) was the best-fitting model that described the adsorption isotherm of Cr(VI) onto MSS25. The maximum adsorption capacity was 46.08 mg Cr(VI) per gram of MSS25. Ion exchange, electrostatic attraction, and adsorption-coupled reduction were determined as the main adsorption mechanisms of Cr(VI) onto MSS25. The high percentages of CaCO3 and Fe3O4 found in the MSS25 structure made a significant contribution to the Cr(VI) adsorption process

Hick and Radhakrishnan on Religious Diversity: Back to the Kantian Noumenon

We shall examine some conceptual tensions in Hick’s ‘pluralism’ in the light of S. Radhakrishnan’s reformulation of classical Advaita. Hick himself often quoted Radhakrishnan’s translations from the Hindu scriptures in support of his own claims about divine ineffability, transformative experience and religious pluralism. However, while Hick developed these themes partly through an adaptation of Kantian epistemology, Radhakrishnan derived them ultimately from Śaṁkara (c.800 CE), and these two distinctive points of origin lead to somewhat different types of reconstruction of the diversity of world religions. Our argument will highlight the point that Radhakrishnan is not a ‘pluralist’ in terms of Hick’s understanding of the Real. The Advaitin ultimate, while it too like Hick’s Real cannot be encapsulated by human categories, is, however, not strongly ineffable, because some substantive descriptions, according to the Advaitic tradition, are more accurate than others. Our comparative analysis will reveal that they differ because they are located in two somewhat divergent metaphysical schemes. In turn, we will be able to revisit, through this dialogue between Hick and Radhakrishnan, the intensely vexed question of whether Hick’s version of pluralism is in fact a form of covert exclusivism.This is the author accepted manuscript. The final version is available from Springer via http://dx.doi.org/10.1007/s11841-015-0459-

Phosphate Adsorption by Silver Nanoparticles-Loaded Activated Carbon derived from Tea Residue.

This study presents the removal of phosphate from aqueous solution using a new silver nanoparticles-loaded tea activated carbon (AgNPs-TAC) material. In order to reduce costs, the tea activated carbon was produced from tea residue. Batch adsorption experiments were conducted to evaluate the effects of impregnation ratio of AgNPs and TAC, pH solution, contact time, initial phosphate concentration and dose of AgNPs-AC on removing phosphate from aqueous solution. Results show that the best conditions for phosphate adsorption occurred at the impregnation ratio AgNPs/TAC of 3% w/w, pH 3, and contact time lasting 150 min. The maximum adsorption capacity of phosphate on AgNPs-TAC determined by the Langmuir model was 13.62 mg/g at an initial phosphate concentration of 30 mg/L. The adsorption isotherm of phosphate on AgNPs-TAC fits well with both the Langmuir and Sips models. The adsorption kinetics data were also described well by the pseudo-first-order and pseudo-second-order models with high correlation coefficients of 0.978 and 0.966, respectively. The adsorption process was controlled by chemisorption through complexes and ligand exchange mechanisms. This study suggests that AgNPs-TAC is a promising, low cost adsorbent for phosphate removal from aqueous solution