Building Leadership Effectiveness This program encourages leaders to develop practices that transform values into action, vision into realities, obstacles into innovations, and risks into rewards. Participants will be introduced to the five practices of exemplary leadership: modeling the way, inspiring a shared vision, challenging the process, enabling others to act, and encouraging the heart Coaching & Communicating for Performance Coaching & Communicating for Performance is a highly interactive program that will give supervisors and managers the opportunity to build skills that will enable them to share expectations and set objectives for employees, provide constructive feedback, more effectively engage in learning conversations, and coaching opportunities. Skillful Conflict Management for Leaders As a leader, it is important to understand conflict and be effective at conflict management because the way conflict is resolved becomes an integral component of our university’s culture. This series of conflict management sessions help leaders learn and put into practice effective strategies for managing conflict.

기독교 사역과 Leadership

Because they are victims of short-term economic pressures and "parochial politics", most American companies critically lack the one factor proven effective in winning competitive advantage: leadership. Thus argues John P. Kotter in this, his third large-scale work on leadership, which continues and complements the work begun in his influential "The General Managers" and "Power and Influence". With compelling evidence, Kotter demonstrates why most American firms do not have the leadership capacity they currently need and explains what they must do to correct this damaging problem. Using comprehensive data from 900 senior executives in 100 American corporations, as well as in-depth interviews with 150 top managers in fifteen successful companies, including General Electric, Citicorp, IBM, Hewlett-Packard, and Coca-Cola, Kotter singles out the practices that develop superior leadership. He identifies both the specific personal attributes and general leadership qualities needed in today's corporations. And, with the spotlight on such individuals as Lee Iacocca at Chrysler and teams like the top management at Johnson & Johnson, he vividly illustrates the four factors that create outstanding leadership in both private and public sector senior and middle level managers. Professor Kotter underscores his argument with glaring examples of managerial failures in firms like ITT, providing eye-opening evidence of damage-- inability to control sagging productivity and poor records in customer service, quality control, and the development of new products-- caused primarily not be poor R&D or labor problems, but by a weak leadership capacity. Filled with dozens of case histories, "The Leadership Factor" reveals an all-too-common picture of companies which, unable to recognize or develop leadership talent and utilize it, create a pervasive gap in corporate planning and personal management. Progress has been made in improving quality management, but is has been limited. Kotter is hard-hitting in his assessment that even American companies which achieve a superior level of success in the leadership area-- IBM, DuPont, Dow Jones, Hewlett-Packard, and Anheuser-Busch, for example, must do even better to match efforts of foreign competitors. In showing how leaders are made, not born, he provides a realistic program structured to help attract, retain, and motivate dynamic, capable leaders in executive and middle management positions. Following Kotter's advice, companies can build strong managerial teams necessary not only for growth-- but also for survival itself.

The Leadership Factor

Carbon and graphene quantum dots (CQDs and GQDs), known as zero-dimensional (0D) nanomaterials, have been attracting increasing attention in sensing and bioimaging. Their unique electronic, fluores...

Review of Carbon and Graphene Quantum Dots for Sensing

Tensile behavior contrast of basalt and glass fibers after chemical treatment

As we know, inflammatory and oxidative stresses have a role in the pathogenesis of cardiovascular disease. This knowledge has triggered many investigations targeted to inflammatory markers. One such example, the neutrophil to lymphocyte ratio (NLR), is an inexpensive and easily accessible inflammatory marker whose role in cardiovascular disease has been studied extensively in the past few years. The neutrophil lymphocyte ratio has been shown to predict cardiac arrhythmias as well as short- and long-term mortality in patients with acute coronary syndromes (ACS). It has correlated well with ACS risk prediction models such as the GRACE and SYNTAX scores. A higher NLR has also been associated with frequent congestive heart failure decompensation and long-term mortality. The neutrophil to lymphocyte ratio also appears to have a prognostic role in patients undergoing transaortic valve replacement and the progression of valvular heart diseases. Despite the science of inflammatory biomarkers having been described decades ago, NLR appears to be enjoying a renaissance as a cost-effective biomarker with immediate clinical predictability and prognostication.

Neutrophil to lymphocyte ratio (NLR) and cardiovascular diseases: an update

Exergy analysis and performance of a Ranque–Hilsch Vortex Tube (RHVT) with various nozzle cross-section areas (NCSA = 3 × 3, 4 × 4, 5 × 5 mm2) were determined under inlet pressures (Pi) of 260, 300 kPa (absolute) pressurized air. The maximum difference in the temperatures of hot output and cold output streams was obtained for NCSA = 3 × 3 mm2. The total inlet exergy ( ∑ E ˙ i ) , total outlet exergy ( ∑ E ˙ O ) , total lost exergy ( ∑ E ˙ Lost ) and exergy efficiency (η, %) were calculated. It was determined that the exergy efficiency of the system, varied between 1% and 39%, and the highest exergy efficiency was obtained for NCSA = 3 × 3 mm2. The exergy efficiency strongly depends on the level of Pi, ξ and vcold. Variation of the exergy efficiency decreased with decreasing Pi, ξ, vcold and the highest and lowest exergy efficiencies were found when the values of Pi, ξ, vcold reached maximum and minimum levels, respectively.

Experimental investigation and exergy analysis of the performance of a counter flow Ranque-Hilsch vortex tube with regard to nozzle cross-section areas

Filament wound hybrid composite pipes are frequently used for the transmission of high pressured chemical fluids, disposal of industrial wastes, oil and natural gas transmission lines. In this study, low velocity impact behavior of the glass/carbon functionally graded filament wound composite pipes with ±55° winding angle was experimentally investigated. The hybrid composite pipes were graded with a fixed layer configuration from inside to outside as glass-glass/glass-carbon/carbon-glass/carbon-carbon. The functionally graded hybrid pipes were subjected to different internal pressure values (4, 16 and 32 bar), and impact response and energy absorption capacity of the hybrid composite pipes were investigated by using weight drop test method with impact energies of 5, 10, 15 and 20 J. The impact force and displacement versus interaction time were measured. The impulsive force, energy absorption capability, and damage formation were also investigated. Delamination, radial and surface matrix crack formations were observed as the main failure mechanisms at the outer surface of the hybrid pipes. Moreover, the effect of impact damage decreased with the increasing internal pressure of the pre-stressed hybrid composite pipes. The impact damaged composite pipes were subsequently subjected to burst tests according to ASTM D1599-99 standards to calculate burst strengths of the damaged composite pipes. The hybrid composite pipes subjected to 32 bar internal pressure before impact loading were exhibited highest burst strengths for the same impact energy levels.

Low velocity impact response of prestressed functionally graded hybrid pipes

Epoxy resins are widely used in engineering applications. However, their low thermal stability limits their usage at high sliding velocities and loads. The mechanical properties and thermal stability of a machine element subjected to friction and wear are very important. In this study, friction and tribology behaviors of multiwalled carbon nanotubes (MWCNTs) and boron nitride (BN)-modified epoxy resin have been investigated. Epoxy resin modified by three different nanoparticle configurations, 0.3% MWCNT, 0.5% BN, and 0.5% MWCNT/0.3% BN, was investigated. The tribological characteristics of nanoparticle-modified epoxy resin were compared with properties of neat resin. The friction and tribological behavior of modified epoxy resin were tested using a ball-on-disc test stand at 1.2 and 1.5 ms−1 sliding velocities under 10 N applied load. The tests were done under dry condition and 1,800 m distance. The friction coefficient, wear loss, and temperature increase during testing were recorded and compared with th...

Enhancement of Wear and Friction Characteristics of Epoxy Resin by Multiwalled Carbon Nanotube and Boron Nitride Nanoparticles

A novel and simple chemical route was successfully applied to graft carbon nanotubes (CNTs) onto silanized plain weave glass fabric (PWGF) mats, as confirmed by Fourier transform infrared spectroscopy and scanning electron microscopy. The CNTs grafted PWGF mats were used to reinforce epoxy matrix for multi-scale composite production due to their potential for increasing interlaminar fracture toughness by bridging the ply interfaces. Grafting CNTs onto PWGFs improved both initial and steady-state toughness more than double as measured by Mode I interlaminar fracture testing. Failed specimens were visualized to determine the failure modes using fractography. The key findings indicated that the covalent interactions created between CNTs and fibers lead fibers bridging the interface region like “barbed wires”, which are mainly responsible for increased fracture toughness as a result of improved interfacial adhesion.

The Mode I interlaminar fracture toughness of chemically carbon nanotube grafted glass fabric/epoxy multi-scale composite structures

In this study, failure behavior of pre-stressed Glass Fiber Reinforced Plastic (GRP) tubes subjected to low velocity impact was investigated. Filament wound E-glass/epoxy composite tubes with a winding angle of ±55° were used in the experiments. The tubes pre-stressed to 32 bars internal pressure, one of the specified operating pressures according to ANSI/AWWA C950 standards. Both prestressed and non-prestressed GRP tubes were subjected to low velocity impact tests at 5, 10 and 15 J low energy levels. Plots of contact force and internal pressure with respect to time and those of force–displacement were obtained and damages occurred on the specimens were examined by means of reflected and transmitted light photography and light microscope. No marked fiber breakages are observed; however, debonding and some sort of delamination on the layers were observed. The GRP tubes with impact damages were subjected to monotonic burst pressures up to failure based on the ASTM D 1599-99 standards. Burst damages on the tubes were studied and variations of their corresponding burst strengths were spotted. Besides that, diameter changes with internal pressures were determined during the tests. Diameter changes with internal pressures for the impacted and the non-impacted tubes were found to be the same.

Ahmet Avci

Papers

Experimental investigation and exergy analysis of the performance of a counter flow Ranque-Hilsch vortex tube with regard to nozzle cross-section areas

Low velocity impact response of prestressed functionally graded hybrid pipes

Enhancement of Wear and Friction Characteristics of Epoxy Resin by Multiwalled Carbon Nanotube and Boron Nitride Nanoparticles

The Mode I interlaminar fracture toughness of chemically carbon nanotube grafted glass fabric/epoxy multi-scale composite structures

Effect of non-penetrating impact damages of pre-stressed GRP tubes at low velocities on the burst strength