Natural Resource Inputs Research Articles

Urban density and spatial carbon emission performance of megacities in China

Increasing urban density promotes a greater social role for cities. The current low-carbon city development goals put forward higher requirements for carbon performance. Based on the viewpoint of minimizing natural resource input and maximizing value acquisition in ecological benefits, the influence of urban density on spatial carbon performance is analyzed by polynomial function relationship, and Beijing and Shanghai with different urban function positioning are taken as examples for comparative analysis. Combined with Point-of-Interest (POI), the classification benchmark of industrial activities was established, and the spatial kernel density of ArcGIS software was used to analyze the industrial agglomeration characteristics of the two cities. The results show that: 1) The “increase-decrease-increase-decrease” trend of urban spatial carbon performance over time fluctuates around the unary linear trend of urban density.2) Population and building density are too low or too high, which is not conducive to emission reduction. The change of economic density is influenced by the industrial structure. The change of urban density is negatively correlated with the growth rate of spatial carbon performance. In a certain development stage, the increase of urban density will inhibit the growth of spatial carbon performance to some extent. 3) Maintaining the original economic and industrial structure, the increase in economic density brought by the simple expansion of scale is not conducive to emission reduction. The increase of economic density brought by the transformation of economic or industrial structure and the reduction of the proportion of secondary industry is conducive to urban emission reduction.

Mealworm larvae and black soldier fly larvae as novel protein supplements for cattle consuming low-quality forage.

The global population is projected to increase, indicating that there will be greater demand for animal protein to meet the associated food needs. This demand will place additional pressure on livestock systems to increase output while also minimizing natural resource inputs. Insect protein has emerged as a potential alternative to conventional protein feeds, such as soybean meal. Mealworm larvae (MWL; Tenebrio molitor) have been studied in poultry and swine as an alternative protein source; however, there is no research currently evaluating MWL for cattle. Black soldier fly larvae (BSFL; Hermetia illucens) have also received attention for their potential use in livestock feed due to their scalability and nutritional value, but research in cattle is limited. The objective of this study was to evaluate the effects of whole-dried MWL and defatted BSFL as protein supplements for cattle consuming forage. Five ruminally cannulated steers were utilized in a 5 × 5 Latin square experiment to determine how MWL and BSFL supplementations affect forage utilization. Steers consuming ad libitum low-quality forage (76.5% neutral detergent fiber [NDF], 4.2% crude protein) were provided one of the five treatments each period: 1) control with no supplement (CON), 2) soybean meal (CONV), 3) BSFL, 4) MWL, or 5) 50/50 by-weight blend of BSFL and MWL (MIX). All treatments were provided at 100 mg N/kg BW and periods included 8 d for treatment adaptation, 5 d for intake and digestion, and 1 d for ruminal fermentation measures. Protein supplementation stimulated forage organic matter intake (FOMI; P ≤ 0.01) relative to CON (3.28 kg/d). There was a significant difference in FOMI (P ≤ 0.01) between BSFL (4.30 kg/d) and CONV (4.71 kg/d), but not between CONV and MWL (P = 0.06, 4.43 kg/d). Total digestible OM intake (TDOMI) was also stimulated by the provision of protein (P ≤ 0.01), from 1.94 kg/d for CON to an average of 3.24 kg/d across protein supplements. Organic matter digestibility (OMD) and NDF digestibility (NDFD) were not affected by treatment (P ≥ 0.37), for an average OMD of 66.5% and NDFD of 62.7%. There was also no treatment effect on ruminal volatile fatty acid (P = 0.96) or ammonia-N (P = 0.22) concentrations. These data indicate that MWL may stimulate forage utilization by beef cattle to a greater extent than BSFL, but both are viable protein supplements.

Ensuring China's food security in a geographical shift of its grain production: Driving factors, threats, and solutions

Grain production in China has increased over time despite limited access to natural resources. However, this has led to China's grain supply system becoming increasingly vulnerable and unsustainable due to a northward shift of its grain production. Here, we establish a framework to guide future grain policy formulation in response to previous practices and lessons learned from China's past grain production. This framework integrated the spatial gravity model, spatial mismatch index, logarithmic mean Divisia index (LMDI), and Monte Carlo simulation to identify the key drivers behind grain growth, analyze their impacts on food security, and propose countermeasures. We found that grain production increase in China is not universally attributable to increased input of farmland and water resources, but rather, socio-economic factors including agricultural technology and irrigation facilities have improved efficiency. The spatial heterogeneity in their driving effects in different major grain producing regions has led grain production to shifted to the northern regions that have few natural resources, posing new challenges for food security: without new policies, China will not be poised to meet increased grain demand projected from 2025 to 2030, especially for rice and soybeans. From a comparison across four grain policies, it is found that region-specific policies will most effectively accelerate transitions to sustainable food production systems. We urge decision-makers to reach beyond natural resource inputs and focus on socio-economic factors, particularly inputs for replanting abandoned farmland and irrigation facilities that can ensure food security in the future.

Equity and justice should underpin the discourse on tipping points

Abstract. Radical and quick transformations towards sustainability will be fundamental to achieving a more sustainable future. However, deliberate interventions to reconfigure systems will result in winners and losers, with the potential for greater or lesser equity and justice outcomes. Positive tipping points (PTPs) have been proposed as interventions in complex systems with the aim to (a) reduce the likelihood of negative Earth system tipping points and/or (b) increase the likelihood of achieving just social foundations. However, many narratives around PTPs often do not take into account the entire spectrum of impacts the proposed alternatives could have or still rely on narratives that maintain current unsustainable behaviours and marginalize many people (i.e. do not take “b” into account). One such example is the move from petrol-based to electric vehicles. An energy transition that remains based on natural resource inputs from the Global South must be unpacked with an equity and justice lens to understand the true cost of this transition. There are two arguments why a critical engagement with these and other similar proposals needs to be made. First, the idea of transitioning through a substitution (e.g. of fuel) while maintaining the system structure (e.g. of private vehicles) may not necessarily be conceived as the kind of radical transformation being called for by global scientific bodies like the Intergovernmental Panel on Climate Change (IPCC) and Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES). Second, and probably more importantly, the question of positive for whom, positive where, and positive how must be considered. In this paper, we unpack these narratives using a critical decolonial view from the south and outline their implications for the concept of tipping points.

91 Mealworm and black soldier fly larvae as protein supplements for beef steers consuming forage

Abstract The global population is projected to increase, indicating there will be greater demand for animal protein to meet the associated food needs. This demand will place additional pressure on livestock systems to increase output while also minimizing natural resource inputs. Insect protein has emerged as a potential environmentally sustainable alternative to conventional protein feeds, such as soybean meal. Further, insect protein does not compete in the human food market as the products of conventional oil crops often do. Mealworm larvae (MWL) has been studied in poultry and swine as an alternative protein feed; however, there is not currently research evaluating MWL for cattle. Black soldier fly larvae (BSFL) has also received attention for its potential use in livestock feed due to its scalability and nutritional value, but research in cattle is limited. The objective of this study was to evaluate the effects of whole dried MWL and defatted BSFL as protein supplements for cattle consuming forage. These procedures were approved by IACUC at Texas State University (#7726). Five ruminally cannulated steers were utilized in a 5×5 Latin square experiment to determine how MWL and BSFL supplementation affect forage utilization. Steers consuming low-quality forage (4.2% crude protein) were provided one of five treatments each period: 1) control with no supplement (CON), 2) soybean meal (CONV), 3) BSFL, 4) MWL, and a 5) 50% BSFL and 50% MWL by-weight (MIX). Supplements were provided at 100 mg N/kg BW. Periods included 8-d for treatment adaptation, 5-d for intake and digestion measurements, and 1-d for ruminal fermentation measures. Dry matter (DM), organic matter (OM), CP, neutral detergent fiber (NDF), and acid detergent fiber (ADF) were determined for diet, ort, and feces. Protein supplementation stimulated forage OM intake (P ≤ 0.01) relative to CON. There was a significant difference in FOMI (P ≤ 0.01) between BSFL and CONV. Steers receiving CONV treatment consumed 4.71 kg FOMI/d, which was significantly greater (P ≤ 0.01) than those receiving BSFL (4.30 kg/d). There were not differences in FOMI between other treatment groups. Total digestible OM intake (TDOMI) was stimulated by protein supplementation (P ≤ 0.01) from 1.94 kg/d for CON to an average of 3.24 kg/d across protein supplements. Organic matter digestibility (OMD) and neutral detergent fiber digestibility (NDFD) were not affected by treatment (P ≥ 0.37), for an average OMD of 66.5% and NDFD of 62.7%. There was also not a treatment effect (P = 0.96) on total volatile fatty acid (VFA) concentrations, although there were some shifts in molar proportions of individual VFAs across treatments. These data indicate that MWL may be more efficacious than BSFL in stimulating forage utilization in beef cattle, but both are viable protein supplements.

Effect of extraction solution on functional properties of extracted protein from Bombay locust (Patanga succincta Johannson, 1763)

Alternative sources of protein are gaining popularity since they require less natural resource input, but still provide a significant amount of protein as compared to traditional protein sources. Insect protein is one of the alternative protein types, and due to its nutritional benefits, research interest in Bombay locust (Patanga succincta) (BL) protein has grown. In the present work, we aimed to determine the protein content, yield, molecular weight profile, and functional properties such as protein solubility, emulsion, and foam properties of BL protein extracted using distilled water, salt (NaCl), or alkaline (NaOH) solution, at the concentrations of 0.5, 1.0, or 1.5%. The highest protein extraction yield was alkaline soluble protein (22 - 28%), which was followed by water (16%) and salt (11 - 13%) soluble proteins. The protein powder prepared by 0.5% alkaline extraction had the highest foam capacity (33.33%) and foam stability (12.50%) (p < 0.05), but the water soluble protein powder had the highest emulsion activity index (118.3 m2/g) and emulsion stability index (52.45 min) (p < 0.05). These results indicated that the type and concentration of solution could have an impact on the protein extraction yield, molecular weight profile, and functional characteristics.

Coupled patterns of natural and anthropogenic resources in typical ecosystems in coastal areas of China

The coastal area of Yancheng, China, is one of the hotspots for ecological research. Under the coupling of human and natural ecosystems, the region has gradually evolved into a coexistence of aquatic, agricultural and mudflat ecosystems. What are the patterns of natural and artificial resource inputs and patterns of change in ecosystems? How can ecological flows be analyzed at a uniform scale? Here, we selected six typical local ecosystems, namely, rice‒wheat for enterprises (RWE), rice‒wheat for smallholder households (RWS), chrysanthemum‒wheat (CW), fish polyculture (FP), juvenile crab farming (JF) and clam polyculture (CP), and analyzed their energy flow flux and sustainability based on emergy theory. The results showed that anthropogenic resource inputs were higher than natural resource inputs in all ecosystems, and the inputs of aquatic ecosystems were greater than those of agroecosystems. The greatest total input was 2.0 E+17 seJ/ha/yr for FP, and the lowest was 1.9 E+16 seJ/ha/yr for RWE. The proportions of renewable and artificial inputs for RWE, RWS, CW, FP, JF and CP were 32.8% vs. 96.1%, 40.3% vs. 96.5%, 34.7% vs. 97.0%, 32.6% vs. 99.4%, 55.1% vs. 98.5%, and 62.5% vs. 98.6%, respectively. The highest input to agroecosystems was nitrogen fertilizer, while in JF and CP, it was water, and feed (63.3%) accounted for the highest percentage of input in FP. JF and CP had lower environmental loads and higher sustainability than other ecosystems, but this still represents a high input compared to agroecosystems. Human-led resource coupling profoundly affects ecosystem sustainability, and various thresholds of energy use and ecological sustainability need to be studied in depth. Continuous exploration of methods and mechanisms for the maintenance and evolution of ecosystems with low total inputs and low inputs of non-renewable resources can contribute to high-quality sustainable development of an area or region.

Pre-scaling up of ground nut varieties in selected districts of West and Kellem Wollega zones, Ethiopia

The study was conducted in Dale sadi, Dale wabera and Sayo districts of Kellem wollega Zone and Gimbi districts of west Wollega zone for two consecutive years of production(2016/17 and 2017/18 G.C ) on farmers’ field. The objective of the study was to pre-scale up and popularize the best-performing and preferred groundnut variety in the study area. The study addressed a total of 90 farmers in the two years of the project span. From a total of 90 farmers, male represents 73 and female 17. During farmers’ selection process, both female and male farmers were incorporated so as to avoid gender bias. Training was given to the selected farmers, development agents and district experts about improved groundnut technologies production and management. Full packages of the technologies were provided. Variety Manipinter was planted on plot area of 0.25ha on respective farmers’ field in the study area. The recommended rate of NPS 100kg/ha and Row planting method with the spacing of 60cm between rows and 10cm between plants were used respectively. To enhance farmer’s knowledge on Groundnut training was given for target community on agronomic practice of Groundnut. During training a total of 117 target communities were participated on training out of which 84 were male and 33 were male. An average production of 14.935 qt/ha and a total of 336 quintal of groundnut yield was harvested during project life span. Finally, farmers feedback concerning technology was collected and incorporated, accordingly the farmers feel as the Manipinter have relatively high yield, good seed quality (Grain size, color), disease tolerant than previously used varieties. Generally, since it is impossible to address all farmers only by the effort of the research center, district agriculture and natural resource bureau in collaboration with zonal agricultural and natural resource office and input supplying NGO’s should hold the turn to scale up the technology in wider scale. Res. Agric. Livest. Fish. Vol. 10, No. 2, August 2023: 147-153

Spatial spillover effects of forest ecological security on ecological well-being performance in China

Improving ecological well-being performance (EWP) is important for the construction of ecological civilization and sustainable development. The forest ecosystem provides multidimensional ecological well-being for humans, and forest ecological security (FES) has an important impact on the ability of human beings to obtain well-being from the ecosystem, providing multiple guarantees for EWP enhancement. Based on the panel data from 2004 to 2018, we estimate the EWP and FES index of 30 Chinese provinces using stochastic frontier model and TOPSIS, respectively. The spatial econometric model is also used to analyze the impact and spatial spillover effects of FES on EWP. The results show that (1) the level of overall EWP in China from 2004 to 2018 is high, but still not fully effective in converting natural resource inputs into well-being levels, showing a trend of fluctuating decline. Meanwhile, the spatial variation is obvious, where provinces with low EWP are mainly concentrated in the less developed western regions. (2) The FES index overall performance stands at the lower level, but maintaining a stable growth trend. Similarly, there are spatial variations in the distribution of FES, and declined in the order of East, Central, Northeast, and West China, which is basically consistent with the socioeconomic development status. (3) EWP and FES are both significantly correlated in spatial dependence, and the improvement of FES not only promotes EWP in the local, but also positively affects the neighbors through spatial spillover effects, with the indirect effects in the decomposition effects being much larger than the direct effects. In the context of resource scarcity and environmental constraints, the findings of this paper provide empirical evidence for policy formulation to enhance EWP, and the security status of forest ecosystems is a key consideration.

Resource conservation from the perspective of infection prevention

Procedures to prevent surgical site infections require ahigh input of human, technical and natural resources. This paper explores ways to optimize the use of resources in caring for patients who undergo asurgical procedure without compromising patient safety. Review of the contribution of selected procedures for infection prevention in surgical patients considering current evidence and recommendations by comparing current guidelines and results of clinical trials. Analysis of interventions to implement and increase compliance. Knowledge of current evidence-based recommendations enables not only the identification of procedures with proven effect on infection prevention but also those that are ineffective and thus dispensable. There is still need for further controlled studies, e.g. on the use of antiseptics, that can confirm the evidence level of preventive procedures. Infection surveillance in combination with process and compliance monitoring by infection prevention specialists with afeedback system to healthcare workers are suitable control instruments for infection control management. In the case of increased infection rates, the implementation of evidence-based recommended measures through tailored bundle interventions is successful. Technical measures to maintain environmental conditions must be included in the control process. The reduction of healthcare-associated infections by implementing tailored interventions of infection prevention measures and elimination of ineffective procedures conserves resources and promotes patient safety.

Short-Run Adjustments in Taiwan to Free Trade in a Multisector Specific Factors Model

ABSTRACT While Taiwan developed due to progress toward free trade, slowing growth since the 1990s has revived protectionism as trade agreements falter worldwide. The present study contributes to the ongoing debate examining the short-run income redistribution due to unilateral free trade in an applied specific factors model with 77 industries. The simulations reveal considerable declines in the returns to capital in the import competing industries relative to other industries, a moderate wage increase, and a negligible impact on the price of natural resource inputs. The short-run adjustments to immigration and foreign direct investment are also examined.

Emergy-based valuation for agricultural ecosystem in Shangri-La County, tourism region in Yunnan Province, China

This paper quantitatively analyzes the input–output of energy values, environmental carrying capacity and the effect of ecosystem operation for the agricultural ecosystem in Shangri-La County, which is one of the tourism regions in Yunnan province. The aim of this paper is to better understand the utilization of solar energy resources and the sustainable development of agriculture. The results showed that the emergy yield rate in the area of study was 342.66, the emergy investment rate was 0.01, and the emergy density was 3.49 × 1011 sej/m2. The emergy input per capita was 2.32 × 1016 sej/pp, and the emergy yield per capita was 8.42 × 1016 sej/pp. This work revealed that the environment contribution rate was 98.97%, the renewable resource input rate was 97.34%, the non-renewable natural resource input rate was 1.63%, and the non-renewable industrial resource input rate was 1.03%. Besides, the study also showed that the environmental capacity was 0.027, and the environmental sustainability index was 12,691.11. The results affirmed that the agricultural economic development was relatively backward, and the sustainable development ability was weak. To advance the agricultural economy and strengthen the sustainable development ability of agriculture, it is necessary for the Shangri-La County authority to pay more attention to increasing the high-grade ability energy, adjustment of the emergy investment structure and agricultural development mode transformation.

Finite resources and the world economy

We build and evaluate a global macroeconomic model incorporating natural-resource scarcity. The model features low short-run substitutability between the natural resource and other inputs, while in the longer run endogenous directed technical change—allowing the economy to save on scarce resources—generates much higher substitutability, with rather stable cost shares. A nontrivial feature of the framework is secularly increasing resource use: initially, when the resource is abundant, much less is used of it, and as physical and human capital are accumulated, its use increases. The model is also able to generate highly volatile prices at higher frequencies.

Sustainable Development Based on Green GDP Accounting and Cloud Computing: A Case Study of Zhejiang Province

Cloud computing is a supercomputing that integrates large-scale and scalable computing, storage, data, applications, and other distributed computing resources for collaborative work in the form of virtualization technology as the basis and the network as the carrier to provide infrastructure, platform, software, and other service’s model. Green GDP (GGDP) is an assessment indicator for regional sustainable development. Hence, the evaluation index on GGDP and greening of the national economic accounting system (SNA) are the hotspots of current ecological and economic studies. In the recent years, Zhejiang’s economy has achieved rapid development, and there are also problems of high input and high consumption of natural resources, thereby restricting its sustainable development. Based on the statistical data of Zhejiang Province during 2000–2017, the GGDP within the sustainable development context is calculated using the system of integrated environmental and economic accounting (SEEA). The results indicated the following: (1) The GGDP accounted for 79.29%–96.78% of Zhejiang's GDP during the study period, which showed volatility upward trend, resulting from the significant environmental protection and conservation of natural resources in the study area. But economic development was heavily dependent on resources, and the local government still strengthened the work of improving resources and environment. (2) The proportion of secondary industry in Zhejiang Province fluctuated downwards during the period of 2000–2017, and the tertiary industry showed a volatility upward trend, which exceeded the proportion of the secondary industry, indicating that Zhejiang Province is from an industry-led economy to a service-oriented economy change. (3) The GGDP of Zhejiang Province accounted for the highest proportion of GDP in 2008, resulting from the result of a combination of relevant national policies and international competitions.

The End of Factory Farming

The End of Factory Farming

Global Inequality in Agriculture, Nutrition, and Health

Humans globally have similar nutritional needs but face large differences in natural resource endowments and local food production. This study quantifies food system inequality across countries based on natural resource inputs, food/nutrient outputs, and nutrition/health outcomes, from 1970 to 2010. Animal source foods and overweight/obesity show rapid convergence while availability of selected micronutrients demonstrate slower convergence. However, all variables are more equally distributed than national income per capita, whose Gini coefficient declined from 0·71 to 0·65. Inequalities in total and animal-source dietary energy declined from 0·16 to 0·10 and 0·55 to 0·36, respectively. There was convergence in overweight/obesity prevalence from 0·39 to 0·27, while undernutrition and stunting became increasingly concentrated in a few high-burden countries. Characterizing cross-country inequalities in agricultural resources, foods, nutrients, and health can help identify critical opportunities for agriculture and food policies, as well as prioritize research objectives and funding allocation for the coming decade.

Modeling Sediment Ni and V Spatial Distributionto IdentifyHotspotsin the Shadegan Wildlife Refuge, at the Head of the Persian Gulf.

The distribution and origins of Ni and V were assigned in the surficial sediments from 160 stations in Shadegan international wetlands with 537,700ha. The findings showed that the mean total content of Ni and V in the surface sediments were 45.08 ± 12.09 and 25.25 ± 20.8μgg-1 dw, respectively. According to the analysis chemical speciation, the Ni and V residual fraction in the surface sediments were calculated for > 80% of the total level of metals, indicating that the metals may be an indicator for the input of natural resources. The analysis of the interpolation maps according to their chemical fractionation manifested that the Ni and V pollution hotspots have been happened in the northern, southern, and western points. Interpolation maps also highlighted that Ni and V are often controlled by natural factors like parent material; however, anthropogenic inputs have also caused the accumulation of these metals in the sediment.

Reorientation of aquaculture production systems can reduce environmental impacts and improve nutrition security in Bangladesh.

Aquatic foods are a critical source of human nutrition in many developing countries. As a result, declines in wild-caught fish landings threaten nutritionally vulnerable populations. Aquaculture presents an opportunity to meet local demand, but it also places pressure on natural resource inputs and causes a range of environmental impacts. Here, we examine whether current aquaculture systems in Bangladesh can be reoriented to address prevailing nutritional deficiencies while minimizing these environmental impacts. Current fish farming practices, even when optimized, cannot fully supply the same essential micronutrient densities of zinc, iron and calcium as wild-caught fish. However, when the proportion of highly nutrient-dense small indigenous fish species (SIS) was increased to at least 30% of the total output in any of the 14 aquaculture production systems analysed, these systems were able to meet or surpass the nutrient densities of average wild-capture fisheries. Extensive aquaculture systems that co-produce fish and rice had the lowest environmental burdens in six out of seven metrics examined when the composition of all aquaculture systems was modified to include 50% SIS. Nutrition-sensitive aquaculture that provides greater human health benefits and minimizes environmental impacts is a key societal challenge that requires targeted interventions and supportive policies.

Spatio-Econometric Analysis of Urban Land Use Efficiency in China from the Perspective of Natural Resources Input and Undesirable Outputs: A Case Study of 287 Cities in China.

The rapid urbanization in China has had a huge impact on land use and the scarcity of land resources has become a constraint for sustainable urban development. As urban land is an indispensable material basis in economic development, measuring its use efficiency and adopting effective policies to improve urban land use efficiency (ULUE) are important links in maintaining sustainable economic growth. By establishing a comprehensive ULUE evaluation index system that emphasizes on incorporating the natural resources input and the undesirable output, ULUE from 2010 to 2016 was calculated based on super efficiency SBM model, and its potential influencing factors were explored using a spatial econometric model. The results show that: (1) temporally, the overall ULUE in China is upward growing, and the gap among regions is becoming gradually convergent. (2) Spatially, the ULUE of Chinese cities are positively correlated. (3) Economic agglomeration and industrial structure significantly improve ULUE in China, but the intensity of energy consumption has a negative impact on ULUE. We suggest that: (1) differentiated industrial development strategies should be formulated; (2) the economic growth pattern should be changed from energy-consuming to energy-saving; (3) priority should be given to innovation on science and education, so as to increase in clean energy input and cleaner production.

ANALISA PEMELIHARAAN PATIENT MONITOR di UPTD PUSKESMAS TELUK DALAM

"Analysis of Patient Monitor Maintenance at the UPTD public healty center Teluk dalam".Continuous health services need to be supported by equipment that is always ready to use and can function properly. This requires public healty center management to be able to manage and maintain medical equipment effectively and efficiently. This study aims to determine the implementation of patient monitor maintenance at the UPTD public healty center Teluk dalam. This research is a descriptive study with a quantitative survey method. The instrument used is to collect data. The results of this study indicate the aspects of natural resource input, processes, and outputs. The results of this study indicate that in practice, it cannot run properly, caused by limited technicians, lack of training, and maintenance SOP are not in accordance with procedures. It is recommended that the public healty center management pay more attention to the equipment maintenance system (input, process, and output) in order to avoid the problem of equipment damage and to work optimally.