the advanced capabilities of accelerometers offer a more robust data set that coaches or athletes can use to assess more than just jump height (Crewther et al., 2011; McMaster, Gill, Cronin, & McGuigan, 2013). Previous research has determined the validity and reliability of vertical jump height (Casartelli, Müller, & Maffiuletti, 2010; Castagna et al., 2013) and estimated power output (Comstock et al., 2011) derived from accelerometers, and generally agree that accelerometers offer a valid and reliable method for measuring these variables. However, other variables such as power output and velocity measures are not as valid or reliable (Choukou, Laffaye, & Taiar, 2014). Although jump height and power output are commonly used as performance measures in athletes, some coaches may also be interested in the role of force production

Vibrations caused by blasting works have an impact not only on buildings but also the internal environment of the buildings. If these buildings are situated in the surroundings of quarries, the citizens can perceive these vibrations negatively. By applying an appropriate millisecond timing interval, it is possible to lower the intensity of vibrations to the levels that the citizens will not perceive as negative effects inside the buildings. The limit values for this vibration intensity have not been defined to date. For the protection of the building from the vibrations, normative values of the particle velocity and frequency were determined. Hygienic standards for the inhabitants of the housing were applied, which assessed the impact of the vibration on humans through the measurement of the vibration acceleration in the housing. In this article, the results of the research carried out in Trebejov Quarry are presented. The experimental blasts carried out in Trebejov Quarry proved that the reduction in the vibration intensity under the value 2 mm.s−1 led to the satisfaction of the inhabitants.

In this case study, the medium-sized enterprise is looking for ways to achieve sustainable development. Following the Industry 4.0 trend could get the enterprise closer. The rate of information technology usage is very low in the enterprise. The enterprise’s problem is the long production of orders. The orders had to be rejected many times because the customer’s time limit could not be met. The major cause seems to be two environmentally insufficient and obsolete machines in the blast cleaning operation. These machines are replaced in the production by one new wheel blast machine. However, the production process must be redesigned and the layout changed to use this machine effectively. This redesign is difficult to verify and evaluate in the pilot plant experiment. Simulation is the most suitable tool to do it quickly and relatively easily. The ExtendSim simulation program creates a real production process model and then applies the redesign of this process in the model. The model must be thoroughly verified concerning the real production process to not distort the results. The result of the redesign of the production process is the reduction of the production duration by almost 50% and elimination of two environmentally insufficient and obsolete machines. Improved machine blast cleaning has also significantly reduced the utilization of blast cleaning. Spared capacities can be used for pre-production or otherwise for the profit-making of the enterprise. However, a new bottleneck appeared elsewhere in the production process by removing the previous one. The innovation passed through barriers, and Slovak small and medium enterprises started building sustainable development. The enterprise still must focus on further innovation, and more investment will be needed to achieve the final sustainable development goal.

Of all the renewable energy sources used for power generation, biomass energy has experienced the greatest growth over the last decade. Spurred by requirements established in the Public Utility Regulatory Policies Act of 1978 (PURPA), as well as various tax incentives, biomassbased power generation now provides more than 50 billion kWh of electric energy from 10,000 MW of installed capacity. The overwhelming majority of this capacity, primarily wood-based, has been developed by the nonutility sector. However, the biomass industry is currently facing more difficult market conditions due to a reduction in federal incentives and changes in the generation market, such as lower utility avoided costs, slower demand growth, and greater competition among fuel sources. States are increasingly contemplating the inclusion of market externalities costs and benefits associated with different generation options in electricity resource planning and procurement decisions. Market externalities, as they relate to generation resources and technologies, represent impacts that are not wholly reflected in the market price of electricity derived from these sources. These impacts, which can be either positive or negative, can encompass environmental, economic, and other social factors, but state considerations have focused predominately on environmental externalities costs, especially air emissions. The explicit quantification of externalities could measurably affect the competitive standing of various energy resources and technologies in future utility resource acquisitions. It is still too early to ascertain to what extent externalities considerations will impact resource planning and acquisition decisions. There is currently little, if any, evidence indicating that the

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