Contractual Governance for BIM-enabled Projects: BIM Maturity, Contract Specificity and Performance

2020 ◽  
Author(s):  
Yuxing Jiang ◽  
Ying Gao ◽  
Shuibo Zhang
Keyword(s):  
Contractual Governance ◽  
And Performance

Governance and performance in co-exploitation and co-exploration projects

2020 ◽  
Vol 35 (5) ◽  
pp. 875-894
Author(s):  
Miguel Solís-Molina ◽  
Miguel Hernández-Espallardo ◽  
Augusto Rodríguez-Orejuela
Keyword(s):  
Governance Mechanism ◽  
Informal Governance ◽  
Content Type ◽  
Collaborative Innovation ◽  
Innovation Projects ◽  
Innovation Project ◽  
Contractual Governance ◽  
Complementary Assets ◽  
And Performance ◽  
The One

Purpose This study aims to investigate how contractual vs. informal governance influences the performance of collaborative innovation projects considering their exploitation vs. exploration character. Design/methodology/approach Data are collected from a sample of 218 companies that have developed innovative projects in collaboration with other organizations. Regression models are estimated to test the hypotheses. Findings The results indicate that contractual governance is the most effective for co-exploitation projects compared to informal governance. Specialization in either contractual or informal governance is more effective for co-exploration projects. Practical implications Developing collaborative innovation projects with other organizations is an alternative for firms to innovate either by exploiting complementary assets or by exploring new opportunities. Thus, the success of the collaborative innovation project is significantly affected by the way the collaboration is governed. On the one hand, for co-exploitation projects, companies should rely on contracts to improve their performance. On the other hand, for co-exploration projects, governance may specialize in either contracts or informal mechanisms to reach higher performance. Originality/value Despite previous studies analyzing the effect of contractual or informal governance on the performance of collaborative innovation projects, no research has focused on comparing simultaneously these effects, by using the innovation character of the project of co-exploitation or co-exploration as a moderator. Therefore, this paper explores comparatively the most effective type of governance mechanism for co-exploitation and co-exploration projects.

scholarly journals Governance Mechanisms for Green Supply Chain Partnership

2018 ◽  
Vol 10 (8) ◽  
pp. 2681 ◽  
Author(s):  
Chen-lung Yang ◽  
Suyuan Lien
Keyword(s):  
Supply Chain ◽  
Environmental Performance ◽  
Green Supply Chain ◽  
Supply Chain Collaboration ◽  
Governance Mechanisms ◽  
Mediation Effects ◽  
Significant Performance ◽  
Contractual Governance ◽  
And Performance ◽  
Green Supply Chains

The literature has recognized the value of green supply chain management in achieving the goals of environmental management. Yet developing and fostering sustainability partnerships among supply chain organizations remains challenging. Bounded rationality and opportunistic behaviors are likely to hinder joint sustainability collaboration and performance. The literature has called for a better understanding of the governance of green supply chain collaboration. This study applies transactional cost economics as a conceptual framework to investigate the relationships among transaction features, governance mechanisms, and environmental performance. Using the data collected from 969 plants in 17 countries, the statistical analysis compares and validates the effectiveness of three alternative governance mechanisms: contractual governance, problem-solving cooperation governance, and information-sharing governance. The statistical results reveal significant performance differences in how firms apply alternative governance mechanisms to mitigate opportunism, manage adaptation problems, and improve green supply chain collaboration and performance. Overall, this study makes research contributions by confirming the mediation effects of governance mechanisms on green supply chain practices. For green supply chains to be a viable practice, firms should apply governance mechanisms in proper alignment with the nature of the collaborative and environmental conditions.

Transmission Scanning Electron Microscopy and Energy Analysis with the Siemens ELMISKOP 101

1972 ◽  
Vol 30 ◽  
pp. 450-451
Author(s):  
H. M. Thieringer
Keyword(s):  
Objective Lens ◽  
Transmission Microscopy ◽  
Image Recording ◽  
Mode Of Operation ◽  
Scanning Transmission ◽  
Electron Microscopes ◽  
And Performance ◽  
Convergent Beam ◽  
Ray Path ◽  
Beam Diffraction

It has repeatedly been show that with conventional electron microscopes very fine electron probes can be produced, therefore allowing various micro-techniques such as micro recording, X-ray microanalysis and convergent beam diffraction. In this paper the function and performance of an SIEMENS ELMISKOP 101 used as a scanning transmission microscope (STEM) is described. This mode of operation has some advantages over the conventional transmission microscopy (CTEM) especially for the observation of thick specimen, in spite of somewhat longer image recording times.Fig.1 shows schematically the ray path and the additional electronics of an ELMISKOP 101 working as a STEM. With a point-cathode, and using condensor I and the objective lens as a demagnifying system, an electron probe with a half-width ob about 25 Å and a typical current of 5.10-11 amp at 100 kV can be obtained in the back focal plane of the objective lens.

Angular Resolved Electron Spectroscopy with Parallel Recording

1990 ◽  
Vol 48 (2) ◽  
pp. 370-371
Author(s):  
Huang Min ◽  
P.S. Flora ◽  
C.J. Harland ◽  
J.A. Venables
Keyword(s):  
Electron Spectroscopy ◽  
Low Voltage ◽  
Solid Angle ◽  
Detection System ◽  
Voltage Electron ◽  
Cylindrical Mirror ◽  
Inner Radius ◽  
Channel Plate ◽  
And Performance ◽  
Type Detector

A cylindrical mirror analyser (CMA) has been built with a parallel recording detection system. It is being used for angular resolved electron spectroscopy (ARES) within a SEM. The CMA has been optimised for imaging applications; the inner cylinder contains a magnetically focused and scanned, 30kV, SEM electron-optical column. The CMA has a large inner radius (50.8mm) and a large collection solid angle (Ω > 1sterad). An energy resolution (ΔE/E) of 1-2% has been achieved. The design and performance of the combination SEM/CMA instrument has been described previously and the CMA and detector system has been used for low voltage electron spectroscopy. Here we discuss the use of the CMA for ARES and present some preliminary results.The CMA has been designed for an axis-to-ring focus and uses an annular type detector. This detector consists of a channel-plate/YAG/mirror assembly which is optically coupled to either a photomultiplier for spectroscopy or a TV camera for parallel detection.

Novel epoxy/anhydride alternatives for biological electron microscopy: Physical and performance characteristis of embed 812 and LX 112 in combination with NSA/NMA/DMAE

1989 ◽  
Vol 47 ◽  
pp. 1000-1001
Author(s):  
Joe A. Mascorro ◽  
Gerald S. Kirby
Keyword(s):  
Electron Microscopy ◽  
Flow Rate ◽  
Succinic Anhydride ◽  
Volume Flow Rate ◽  
Mass Density ◽  
Uranyl Acetate ◽  
Volume Flow ◽  
Base Resin ◽  
And Performance ◽  
Acid Anhydrides

Embedding media based upon an epoxy resin of choice and the acid anhydrides dodecenyl succinic anhydride (DDSA), nadic methyl anhydride (NMA), and catalyzed by the tertiary amine 2,4,6-Tri(dimethylaminomethyl) phenol (DMP-30) are widely used in biological electron microscopy. These media possess a viscosity character that can impair tissue infiltration, particularly if original Epon 812 is utilized as the base resin. Other resins that are considerably less viscous than Epon 812 now are available as replacements. Likewise, nonenyl succinic anhydride (NSA) and dimethylaminoethanol (DMAE) are more fluid than their counterparts DDSA and DMP- 30 commonly used in earlier formulations. This work utilizes novel epoxy and anhydride combinations in order to produce embedding media with desirable flow rate and viscosity parameters that, in turn, would allow the medium to optimally infiltrate tissues. Specifically, embeding media based on EmBed 812 or LX 112 with NSA (in place of DDSA) and DMAE (replacing DMP-30), with NMA remaining constant, are formulated and offered as alternatives for routine biological work.Individual epoxy resins (Table I) or complete embedding media (Tables II-III) were tested for flow rate and viscosity. The novel media were further examined for their ability to infilftrate tissues, polymerize, sectioning and staining character, as well as strength and stability to the electron beam and column vacuum. For physical comparisons, a volume (9 ml) of either resin or media was aspirated into a capillary viscocimeter oriented vertically. The material was then allowed to flow out freely under the influence of gravity and the flow time necessary for the volume to exit was recored (Col B,C; Tables). In addition, the volume flow rate (ml flowing/second; Col D, Tables) was measured. Viscosity (n) could then be determined by using the Hagen-Poiseville relation for laminar flow, n = c.p/Q, where c = a geometric constant from an instrument calibration with water, p = mass density, and Q = volume flow rate. Mass weight and density of the materials were determined as well (Col F,G; Tables). Infiltration schedules utilized were short (1/2 hr 1:1, 3 hrs full resin), intermediate (1/2 hr 1:1, 6 hrs full resin) , or long (1/2 hr 1:1, 6 hrs full resin) in total time. Polymerization schedules ranging from 15 hrs (overnight) through 24, 36, or 48 hrs were tested. Sections demonstrating gold interference colors were collected on unsupported 200- 300 mesh grids and stained sequentially with uranyl acetate and lead citrate.

Trace nanoanalysis

1994 ◽  
Vol 52 ◽  
pp. 940-941
Author(s):  
D. E. Newbury ◽  
R. D. Leapman
Keyword(s):  
High Performance ◽  
Secondary Ion Mass Spectrometry ◽  
Detection Efficiency ◽  
Volume Element ◽  
And Performance ◽  
Trace Constituents ◽  
Secondary Ion ◽  
Concentration Levels ◽  
Structure Properties

Trace constituents, which can be very loosely defined as those present at concentration levels below 1 percent, often exert influence on structure, properties, and performance far greater than what might be estimated from their proportion alone. Defining the role of trace constituents in the microstructure, or indeed even determining their location, makes great demands on the available array of microanalytical tools. These demands become increasingly more challenging as the dimensions of the volume element to be probed become smaller. For example, a cubic volume element of silicon with an edge dimension of 1 micrometer contains approximately 5×1010 atoms. High performance secondary ion mass spectrometry (SIMS) can be used to measure trace constituents to levels of hundreds of parts per billion from such a volume element (e. g., detection of at least 100 atoms to give 10% reproducibility with an overall detection efficiency of 1%, considering ionization, transmission, and counting).

Relationship of stress and performance among first-year dental students

1986 ◽  
Vol 50 (5) ◽  
pp. 264-267 ◽  
Author(s):  
GH Westerman ◽  
TG Grandy ◽  
JV Lupo ◽  
RE Mitchell
Keyword(s):  
Dental Students ◽  
First Year ◽  
And Performance ◽  
Relationship Of
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