Navigating the Digital Workplace: The Impact of Social Media Use on Thriving and Job Performance with a Focus on Self-Regulation

The purpose of this study is to examine the relationship between social media use, thriving, and job performance given self-regulation as a moderating factor. The increasing social media use by employees in the workplace provides both opportunities and challenges, which may cause its impact on performance outcomes to be highly variable. Moreover, the relationship between social media use and performance outcomes is complex, suggesting that there may be contextual variables influencing the significance of this relationship. Data for this study were collected from 274 academics at Delta State University, Delta State, Nigeria, and subjected to the partial least square [PLS] analytical protocol for structural equation modeling. The PLS results demonstrated that social media use and thriving have a positive and significant link that can be explained partly by the mediational pathway of thriving. Second, self-regulation interaction with social media use triggers thriving, which can be viewed as a significant antecedent of job performance. The study recommended that managers should encourage the regulated use of social media to ensure it stays effective for the realisation of desirable work benefits. This calls for the training of staff to enable them to address conceptions and misconceptions of social media use and develop competencies and strategies for the regulated and productive use of social media applications. Keywords: Learning, Job Performance, Self-Regulation, Social Media, Thriving, Vitalit

DLC coatings for cam follower applications: The role of the surface on tribochemical reactions, friction and wear

In this study, the tribological properties of steel, Mn-phosphate, Si doped (S1s), and hydrogenated tetrahedral amorphous carbon (ta-C:H) diamond like carbon (DLC) coatings were investigated in a pin on reciprocating plate tribometer and single cam test rig. S1s and taC-H DLC coating architectures were obtained with plasma assisted chemical vapor deposition technique with hardness 20 ± 4 GPa and 35 ± 7 GPa respectively. All materials had a centre-line average surface roughness (Ra) of 0.02-0.03 µm except for the Mn(PO3)2 which had Ra of 0.30 µm. The S1s showed severe delamination after tests on the reciprocating tribometer while spots of wear flakes were observed in the bench test. Both single cam rig and reciprocating tests have shown similar wear and friction results which can be used to rank materials, surface coatings and lubricants for optimum performance of valve train components

The effect of clearance between tappet insert and camlobe on the tribological and tribochemical performance of cam/follower surfaces

This paper examines the effect of tappet insert clearance on the tribological and tribochemical performance of the camlobe/follower tribopair when lubricated in a fully-formulated oil containing 1 wt% of Molybdenum Dialkyl Dithiocarbamate (MoDTC). Tests were performed on a Single Cam Rig (SCR), taken from 1.25 l FORD Zetec (SE) engine. White Light Interferometry and Talysurf contact profilometry were used to characterise the wear scar on the tappet inserts and camlobes respectively. In addition, Scanning Electron Microscopy (SEM) was used on both (i.e. camlobes and tappet inserts) for wear mechanisms assessment as well as to access the durability of coatings used on tappet inserts. Energy-Dispersive X-ray (EDX) and Raman spectroscopy analyses were also used to understand the tribochemical interactions between oil additives and the cam/follower interface. Results show that the chemistry of the tribofilm derived on camlobes and tappet inserts vary as a function of tappet insert clearance and cam profile. Also, regardless of the type of coating, the smaller clearance of tappet inserts exhibited higher friction and wear. Therefore, based on this work, the use of the thicker tappet insert would be inadvisable as this possibly can cause higher fuel consumption and inefficient performance of the intake/exhaust valves of the engine

Measuring tappet rotation in a valvetrain rig when lubricated in a fully formulated oil containing MoDTC-type friction modifier

In a direct acting valve train configuration, tappet rotation plays a key role in improving lubrication, reducing wear and friction. However, to the best of the authors' knowledge, no studies were found to investigate the rotation of tappet under the effect of different coatings, thicknesses of tappets and formulations with Molybdenum Dialkyl Dithiocarbamate (MoDTC) which has been recently reported to be detrimental to Diamond-Like Carbon (DLC) wear. In this work, a new technique of measuring tappet rotation has been developed. A giant magnetoresistance (GMR) sensor coupled with a split pole ferrite disk magnet was used. The sensor was installed very close to the tappet/bucket while the magnet was mounted into the underside of the tappet. Experiments were performed using standard production steel tappets coated with Mn-phosphate (MnPO4) and diamond-like carbon (DLC) coatings. In general, results showed that the tappet rotation is strongly dependant on oil formulation, clearance, speed/temperature, and surface roughness of the coating. MoDTC promoted the rotation of the tappet under both coatings. In addition, DLC inserts showed an increase in tappet rotation as compared to MnPO4 inserts. Nevertheless, regardless of the type of coating, the thickest tappets showed the highest rotation

ICOSLG-mediated regulatory T-cell expansion and IL-10 production promote progression of glioblastoma

BACKGROUND: Targeting immune checkpoint proteins has recently gained substantial attention due to the dramatic success of this strategy in clinical trials for some cancers. Inducible T-cell co-stimulator ligand (ICOSLG) is a member of the B7 family of immune regulatory ligands, expression of which in cancer is implicated in disease progression due to regulation of antitumor adaptive immunity. Although aberrant ICOSLG expression has been reported in glioma cells, the underlying mechanisms that promote glioblastoma (GBM) progression remain elusive. METHODS: Here, we investigated a causal role for ICOSLG in GBM progression by analyzing ICOSLG expression in both human glioma tissues and patient-derived GBM sphere cells (GSCs). We further examined its immune modulatory effects and the underlying molecular mechanisms. RESULTS: Bioinformatics analysis and GBM tissue microarray showed that upregulation of ICOSLG expression was associated with poor prognosis in patients with GBM. ICOSLG expression was upregulated preferentially in mesenchymal GSCs but not in proneural GSCs in a tumor necrosis factor-\u3b1/nuclear factor-kappaB-dependent manner. Furthermore, ICOSLG expression by mesenchymal GSCs promoted expansion of T cells that produced interleukin-10. Knockdown of the gene encoding ICOSLG markedly reduced GBM tumor growth in immune competent mice, with a concomitant downregulation of interleukin-10 levels in the tumor microenvironment. CONCLUSIONS: Inhibition of the ICOSLG-inducible co-stimulator axis in GBM may provide a promising immunotherapeutic approach for suppressing a subset of GBM with an elevated mesenchymal signature

ヒョウカ ツール デ ガクシュウシャ ノ ジリツセイ ハ ハグクメルカ フィリピン ノ コウコウセイ ムケ ニホンゴ リソースガタ キョウザイ enTree ノ チョウセン

フィリピンでは2009年6月から教育省により日本語が選択外国語科目として試験的に導入されたことを 受け、報告者らは高校生向け日本語リソース型教材の開発に取り組んでいる。教育省の掲げる目標を受 け、本教材ではフィリピンの高校生が身に付けるべき力を、「Curiosity」を有し「Self-improvement」し ながら、「Discover and Fulfill one\u27s MISSION」を目指すものと位置づけた。そして、これらの力を身に 付けたか否かを確認する方法として、【内省する力】、【学習をモニターする力】、【管理する力】を見 ることにした。学校教育では期末試験として筆記試験が実施されることが多いが、これらの力の評価に は適さないため、報告者らは筆記試験では測れない力を測る評価ツールの開発を試みた。本稿では、こ の評価ツールの概要と開発にあたり考慮した点、現場からのフィードバックについて報告する。Following a memorandum issued by the Department of Education of the Philippines, several public high schools in Metro Manila began offering Japanese language classes as an elective in June 2009. The authors of this paper were tasked with the development of a resource-type teaching material to help students achieve communicative competence to cope with the increasing demands of globalization. This teaching material aims to help students “Discover and Fulfill their MISSIONS” in life by enhancing their “Curiosity” and desire for “Self-improvement”. To confirm its effectiveness, students\u27ability to “reflect”, “monitor learning” and “manage learning records” need to be analyzed. As ordinary tests cannot measure the development of these abilities accurately, the authors developed several assessment tools in response to the nature of their material. Concepts behind these assessment tools, considerations made in their development and feedback from end-users are included in this report