Product Mix Research Articles

DEVELOPMENT OF DRY BUILDING MIXTURES BASED ON REDISPERSIBLE POWDER FOR REGULATING THE PROPERTIES OF PLASTER MIXTURES

The relevance of the work. The results is theoretically substantiated and experimentally confirmed the possibility of obtaining a dry additive-retarder of gypsum setting based on lime and polyvinyl acetate dispersions due to the formation of polyvinyl alcohol and salts of calcium acetate in the result of alkaline hydrolysis of polyvinyl acetate dispersion (PVAD) with the slaked lime in hydrated lime. The results of the work implemented in the production of dry gypsum mixes. Purpose. The development of dry building mixes based on gypsum and time increase of time of their conformance through adding of complex additives on the basis of burnt lime and polyvinyl acetate dispersions [PVAD]. Methodology. The study used standard research techniques to determine physical and mechanical properties of gypsum binders and quality of complex additives according to ДСТУ Б В.2.7-82:2010, ДСТУ Б В.2.7-23-95, ДСТУ Б В.2.7-171:2008. Study of phase composition of materials, micro – and macrostructure was carried out by x-ray diffraction, electron and light microscopy. The results. The influence of the main components of the additive (polyvinyl acetate dispersion and lime) on the properties of hemihydrate gypsum is investigated. The chemistry of the interaction of components of the complex additive, according to which the result of alkaline hydrolysis of polyvinyl acetate is formed: polyvinyl alcohol, a feature of its molecules structure is the presence of hydrophilic OH−groups and the hydrophobic component − a hydrocarbon radical. The hydrophilic part of the molecule being ion adsorbed on the surface of the particles of the binder, forms a monomolecular layer that is oriented with the hydrophobic part of the gypsum particles. It is also possible the formation of calcium acetate Ca(СН3СОО)2, which increases the concentration of calcium ions in solution. The combined effect of hydrolysis products significantly reduce the solubility of hemihydrate, the rate of formation of crystallization centers, due to the slowing effect of these supplements.

An overview of the constructions of conveyors for moving bulk materials, comparison and study of their parameters

The production of concrete mixes, along with their use in the production of building materials and structures, is one of the key processes in the construction industry during the construction, restoration and repair of buildings and structures. Because of this, the need to create modern concrete mixing plants that will meet the requirements of minimum energy consumption and maximum productivity of concrete mixture production is an urgent task. Not only the main operations, which include the dosing of the components of the mixture and their mixing, but also the maintenance operations, namely operations that ensure the timely movement of the components of the concrete mixture from warehouses to the main technological equipment, affect the set rhythm of the concrete mixture production. Conveyors of various types and designs are used to move bulk materials, such as crushed stone and sand. For the rational selection of such equipment in accordance with the characteristics of the cargo to be transported, knowledge of the types of conveyors, their structures and parameters, understanding of operation issues and methods of parameter calculation are required. In addition, it is worth paying attention to the following parameters: maximum cargo transportation productivity, low energy consumption per unit of moved products, low metal content of the structure. The work reviewed the most common designs of conveyors used to move bulk materials in concrete mixing plants, analyzed the disadvantages and advantages of conveyors, as well as technical parameters. As a result, the predominant directions for the use of belt and plate conveyors at construction enterprises were determined. The advantages of belt conveyors, which contribute to their widespread distribution, are high productivity, simplicity of design, reliability, quiet operation, low specific power consumption. When choosing a conveyor, it is recommended to choose the equipment with the highest productivity and the lowest power of the drive motors, however, the performance should be clearly related to other technological equipment.

PENGARUH STRATEGI PEMASARAN TERHADAP MINAT BELI PELANGGAN PADA PAKET WISATA DI NUANSA TOUR AND TRAVEL BANDUNG (STUDI KASUS PADA NUANSA TOUR AND TRAVEL BANDUNG TAHUN 2023)

This research aims to identify and analyze the impact of marketing strategies on consumer purchase intention at Nuansa Tour and Travel Bandung. This research uses a descriptive quantitative method with a survey approach, utilizing questionnaires distributed to consumers who have seen Nuansa Tour and Travel content on social media. The variables studied include the marketing mix (product, price, place, promotion, people, process, and physical evidence) and consumer buying interest, which are measured using a Likert scale. The data analysis technique uses a simple linear regression test to determine the relationship between marketing strategies and purchase intention. This research provides insight for Nuansa Tour and Travel in developing more effective marketing strategies to increase consumer buying interest. Recommendations include improving service quality, adjusting competitive prices, optimizing distribution channels, and strengthening promotions through social media. Thus, Nuansa Tour and Travel can better fulfill consumer needs and preferences and increase their competitiveness in the tourism market.

Experimental and Statistical Modeling the Influence of Temperature Regimes of Asphalt Concrete Mix Production and Volumes of Supplied Protective Gases on the Process of Thermal Oxidative Aging

Experimental and Statistical Modeling the Influence of Temperature Regimes of Asphalt Concrete Mix Production and Volumes of Supplied Protective Gases on the Process of Thermal Oxidative Aging

A Systems Firm-Centered Perspective on the Environmental Assessment of Recyclable PET and Glass Soft Drink Containers

This paper adopts a systems firm-centered perspective on the environmental assessment of recyclable glass and PET soft drink containers. We employ LCA and discrete-event simulation modeling for the environmental assessment of the two soft drinks packaging alternatives in operational terms over the entire supply chain over a period of three years. The assessment is based on real data collected from a large soft drink producer and its suppliers. The research and practice contribution of the paper is twofold: first, it introduces a methodological framework for environmental assessment of companies’ packaging environmental impact under different product and operations strategies; and secondly, it provides a holistic environmental assessment of the two packaging materials (PET and glass) taking into account specific operational issues, such as product mix and recycling and reuse options, as well as activity interdependences and stochasticity. The results of the simulation experiments confirm at the operations system level, for glass, the importance for sustainability, to increase the number of reuse cycles (for the particular case, for significant improvement, seven reuses) and the percentage of used bottles collected for refilling (80% recovery rate), whereas for PET, to increase the percentage of recycled PET in new bottles (towards 30%).

Culture, climate, and landscape shape the savanna and wetland mosaic of the Bolivian Amazon

Environmental archeology of the Amazon has conventionally focused on terrestrial spaces, investigating crop domestication and production, agroforestry and anthropogenic soils. Aquatic environments, however, have been given less attention by archeologists and paleoenvironmental scientists alike. The Llanos de Mojos, a 135,000 km2 basin of the Amazon and mosaic landscape of savannas, wetlands and forests, has long been recognized for its archeological record. A variety of anthropogenic earthworks across the region show significant landscape modifications from Pre-Columbian times used for transportation, resource production and control of floodwaters. Here, we investigate the use and management of wetlands, and their interaction in the wider Mojos mosaic landscape, by integrating extensive archeological, paleoenvironmental and GIS datasets. We demonstrate that past human modifications of the landscape enabled the creation of complex wetland-terrestrial system of resource production, in which wetlands were managed, complementary to terrestrial crop production and agroforestry. Across short distances (40 km), land use strategies were heterogeneous despite being connected in time and space. Additionally, mixed wetland-terrestrial resource production was relatively stable during periods of lower rainfall from 1200–1500 CE, implying that this strategy provided flexibility under conditions of variable climate. The wetlands of the Llanos de Mojos are the result of millennia of human intervention and recognition of this deep heritage is required to make informed management and conservation decisions to ensure the future of this culturally and biologically diverse region.

Assessment of livestock husbandry practices and production constraints among smallholder mixed crop-livestock production systems in the Majang zone, southwest Ethiopia

Livestock production plays a significant role in improving the livelihoods of poor smallholder farmer households in the Majang zone. However, despite its importance, there is limited information on husbandry practices and constraints on livestock production to design and implement effective interventions to maximize productivity. The aim of this study was to assess husbandry practices and major constraints on livestock production in the Majang zone, southwest Ethiopia. A semi-structured questionnaire was used to collect data from a randomly selected sample of 168 households (HHs) through a face-to-face interview from January to May 2021. The results revealed that mixed crop-livestock farming is the dominant livestock production system in the study area. The overall average herd size per household (HH) was 2.15 ± 0.11 cattle, 0.15 ± 0.01 sheep, 0.31 ± 0.09 goats, 0.10 ± 0.02 donkey, 0.04 ± 0.00 mule, 0.13 ± 0.02 horses and 0.24 ± 0.02 chickens. Overall herd size did not differ significantly by AEZ except for sheep (p < 0.05). The primary reason for keeping cattle, goats, sheep, equines and poultry were milk production (27.4 %), meat for home consumption (33.9 %), cash income (33.3 %), transportation (85.1 %), and meat for home consumption (72 %), respectively. In the dry and wet seasons, natural pasture, crop residues, indigenous fodder trees and shrubs (IFTSs), nonconventional feed resources (NCFRs), crop stubbles and improved forages were the main livestock feed resources. The majority (60.1 %) of respondents practiced free-grazing systems. Separate sheds, family dwellings, kraals, and open-walled sheds were the main housing systems used for animals. The majority (79.2 %) of respondents used rivers as a source of livestock drinking water. Trypanosomiasis (18.45 %), African horse sickness (66.1 %) and Newcastle disease (47.02 %) were the most important diseases of livestock. Diseases (35.7 %), lack of access to artificial insemination (35.7 %) and inadequate veterinary services (11.3 %) were identified as the top three constraints limiting production. It is recommended that constraints identified by farmers should be considered in developing and implementing effective interventions to improve livestock productivity and their contribution to poverty alleviation in the study area.

Ultra-Narrow Alkane Product Distribution in Polyethylene Waste Hydrocracking by Zeolite Micropore Diffusion Optimization.

Plastic pollution poses a pressing environmental challenge in modern society. Chemical catalytic conversion offers a promising solution for upgrading waste plastics into valuable liquid alkanes and other high value products. However, the current methods yield mixed products with a broad carbon distribution. To address this challenge, we introduce a tandem catalytic system that features matched acidic sites and confined metals for the conversion of low-density polyethylene (LDPE) into liquid alkanes. This system achieves a liquid alkane yield of 94.0%, with 84.8% of C5-C7 light alkanes. Combined with in situ FTIR and molecular dynamics simulation, the shape-selective mechanisms is elucidated, which ensures that only olefins of the appropriate size can diffuse to the encapsulated Pt sites within the zeolite for hydrogenation, resulting in an ultra-narrow product distribution. Furthermore, due to the rapid diffusion of olefins within the hierarchical zeolite, the catalyst exhibits higher catalytic efficiency and resistance to coking tendency. Our findings contribute to the design of efficient catalysts for plastic waste valorization.

A machine learning based EMA-DCPM algorithm for production scheduling

Some special manufacturing fields such as aerospace may encounter mixed production of multiple research and development projects and multiple batch production projects. Under these special production conditions resource conflicts are more severe, resulting in uncertain operating times that are difficult to predict. In addition, a single project may have tens of thousands of supporting products, making it difficult to effectively control the total construction process. To address these challenges this paper proposes new methods. A model, EMA-DCPM (dynamic critical path method) incorporating attention mechanisms in Enterprise Resource Planning and Mechanical Engineering Society) has been proposed. This model predicts product job time through machine learning methods and discovers the predictive advantage of the attention mechanism through data comparison. The CPM control algorithm was improved to enhance its robustness and an efficient modeling method, “5+X” was proposed. This new method is suitable for mixed line planning management in sophisticated manufacturing projects and has value for practical applications.

A Comparison of the impact of advertising on Customer Buying Behavior Through Different Media

Advertising is the main channel of communication between the producer and the consumer.One of the four pillars of the marketing mix, advertising is a component of the promotion mix (product,price, location, and promotion). Advertising is a marketing strategy used to pique customers' interest ina product so they can decide whether or not to purchase it. Marketers use mass marketing strategiesincluding public relations, brand promotion, and advertising. The aim of this study is to compare theimpact of advertising on customer buying action through different media.

MARKETING MIX ANALYSIS OF PATIENT VISITS AT RSGM GUSTI HASAN AMAN

Background : Improving public health can be conducted by providing the health service of facilities and infrastructure. RSGM Gusti Hasan Aman becomes the center for the dental and oral health center, especially in the province of South Kalimantan. Based on the patient visit data can be acknowledged that 81% of the patient visit in 2020 and 57,6% in 2022 are patients taken or treated by professional student or young dentists. The different amounts of patients visiting are one of the causes of the less impact of the marketing mix in people that conducted by RSGM Gusti Hasan Aman. Purpose: Analyze marketing mix (product, price, place, promotion, people, process, physical evidence) to patient visits at RSGM Gusti Hasan Aman. Methods: Analytical observational research with cross-sectional research design. The population in this research are outpatients at RSGM Gusti Hasan Aman with a research sample of 107 respondents. Results: The results of the chi-square test on the analysis of the influence of marketing mix, product, price, place, promotion, people, process, and physical evidence affect the level of visits. Conclusion: Increasing the marketing mix in each dimension will raise the number of patient visits in utilizing health services.

Synthesis of metal powders via reduction of carbonates in self-stirred autoclave

Abstract Commercial carbonates were used as the metal sources for synthesis of metal powders, and a self-stirred autoclave device was proposed to accelerate the complete reduction of carbonates. Fluent software was employed to simulate the system and analyze the distribution of the solution and particles in the autoclave, Ni and Cu powders were synthesized to verify the experiment’s feasibility. Results indicate that sufficient mixing of reactants, solvents, and intermediate products is maintained in the improved self-stirred autoclave throughout the reaction process, facilitating the full reduction of carbonates and enhancing the uniformity of metal powders. Additionally, because basic carbonates can neutralize the hydrogen ions produced by the reduction reaction, and thus Ni powders can be synthesized without NaOH added, which is beneficial for controlling particle morphology and saving reaction time. Well-dispersed Ni and Cu powders were synthesized via the present route, which is possible to promote the reduction preparation of ultrafine metal powders for other insoluble and slightly soluble metal salts.

A Cost-Effective Approach for Single-Stranded DNA Amplification Using Primer-Blocked Asymmetric PCR.

In vitro amplification of single-stranded oligonucleotide libraries presents a significant challenge due to the potential for excessive byproduct formation. This phenomenon largely affects the quality of the ssDNAs created using the most commonly used methods, e.g., asymmetric PCR, biotin-streptavidin separation, or lambda exonuclease digestion of dsDNA. Here, we describe an improved protocol that combines primer-blocked asymmetric PCR (PBA-PCR) with emulsion PCR and a cost-effective downstream process that altogether alleviates byproduct formation without distorting the sequence space of the ssDNA library. In PBA-PCR, the reaction mixture is complemented with a 3'-phosphate-blocked limiting primer that decreases mispriming, thus reducing polymerization of DNA byproducts. The downstream process includes mixing of the PBA-PCR product with excess reverse complement of the 3'-phosphate-blocked limiting primer and removal of dsDNA strands via biotin-streptavidin separation, yielding purified ssDNAs. In conclusion, we have devised a universally applicable approach for simple and cost-effective production of ssDNA libraries and unique ssDNA sequences with on-demand labeling. Our protocol could be beneficial for a variety of uses, such as generating aptamer libraries for SELEX, creating unique molecular identifiers for a wide range of sequencing applications, providing donor DNA for CRISPR-Cas9 systems, developing scaffold nanostructures, and enabling DNA-based data storage. © 2024 The Author(s). Current Protocols published by Wiley Periodicals LLC. Basic Protocol 1: Amplification of ssDNA libraries using PBA-PCR Alternate Protocol 1: Amplification of ssDNA libraries using emulsion PBA-PCR with a simplified extraction of PBA-PCR products Basic Protocol 2: Purification of PBA-PCR products to remove dsDNA and conversion of 3'-blocked primer to double-stranded complexes Alternate Protocol 2: Purification of PBA-PCR products to remove both dsDNA and blocking primers from the reaction mixture Support Protocol: Analysis of PBA-PCR products by gel electrophoresis.

Mixing and ignition characteristics of laser-induced solid fuel pyrolysis under wide-range variation of crossflow

A theoretical model has been developed to elucidate the thermal initiation laser ignition process of solid fuel. This model comprehensively explores both the heating process of solid fuel and the mixing process of gas-phase pyrolysis gases with crossflow conditions. A two-dimensional transient numerical model has been established and validated through experimental investigations across a spectrum of crossflow fluxes (ranging from 20 to 150 kg/m2/s) and pressures (ranging from 0.15 to 1.83 MPa). The study involves a quantitative analysis of the influence of key macroscopic parameters, including laser energy levels, combustion pressure, and flow rates, on essential mixing characteristics. The solid fuel heating process is segmented into two distinct phases: a preheating phase and a pyrolysis phase, with the latter exhibiting considerably higher heating rates. Notably, a direct linear relationship is observed between the laser energy levels and the rate of heating. It reveals that the dynamics of pyrolysis product mixing are primarily determined by the solid fuel pyrolysis rate and the prevailing crossflow conditions. The dimensionless penetration depth, which measures the extent of pyrolysis product mixing with crossflow, demonstrates an exponential positive correlation with pyrolysis rates and oxidizer flow rates while displaying a negative correlation with combustion pressure. This analysis includes the quantitative determination of proportionality constants and power exponents within the correlations. Finally, the study delves into the intricate interplay between crossflow conditions and the criteria for laser ignition, specifically ignition temperature and the flammable lower limit.

Strategi Promosi Digital Brand MS GLOW Cabang Makassar di Sosial Media Instagram

This study aims to determine the digital promotion strategy of the MS GLOW brand, Makassar branch on social media Instagram qualitative research with a case study approach by taking the object of research is MS GLOW Makassar branch. To fulfil these objectives, a qualitative research was conducted at MS GLOW Makassar branch. Research data was collected through observation and in-depth interviews. The data findings were then analysed, in order to achieve the desired results. The results of this study are to determine the Digital Brand Promotion Strategy of MS GLOW Makassar branch. This promotion is carried out by utilising the 4P marketing mix (product, price, place, and promotion) to ensure a more targeted approach. In addition, they also market dowry and bridal products by utilising the various features available on the Instagram application. In this case, followers who do not give likes or comments on each upload, the appearance of negative feedback in the comments column.

Investigation of the Coupling Between the Dynamics of Vortical Structures and Flame Stability in Bluff-Body Premixed Combustion Using Extended Spectral Proper Orthogonal Decomposition

Abstract Large eddy simulation data of a bluff-body stabilized flame are analyzed using spectral proper orthogonal decomposition (SPOD) to investigate: (i) the role of flame-vortex interactions in the dominant flow dynamics, and (ii) how the proper choice of the cross-spectral density (CSD) defining SPOD can assist in identifying the underlying dynamics. Bluff-body flame holders aim to achieve stable flames under lean premixed conditions to minimize pollutant emissions. The recirculation region induced by the body promotes the mixing of hot combustion products with unburnt gases, preventing the global blowoff. However, the coupling between the shear layers and flame-induced vorticity sources can result in large flow structures that either contribute to increased flame stability or exhibit features typical of the early stages of flame blowout. SPOD is a data-driven technique remarkably powerful in extracting low-dimensional models. For each frequency, it computes a basis of orthogonal modes that maximizes the content of a predefined CSD in the leading modes. By choosing physically-relevant variables to construct the CSD, different physics can be explored, which is used here to investigate the coupled dynamics between the flame-induced baroclinic torque, vortical structures, and the temperature field. The results show that the vorticity and temperature fields exhibit low-dimensional dynamics characterized by a narrowband frequency and its harmonics; these dynamics are varicose oscillations of the flame region, governed by the baroclinic torque. Sinuous oscillations typical of wake instability for non-reactive flows are also present, suggesting a competition between them.

Analisis Gugus Fungsi dan Sifat Termal Limbah Jaring Ikan Untuk Produk Otomotif

Plastic has been used in daily life due to its durability. Fishing net waste is a type of plastic waste that is dangerous. Fishing net waste can also damage marine biota, such as coral reefs and marine animals. One type of polyamide that is widely used is nylon. Fishing net waste containing nylon has the potential to be recycled. In this research, fishing net waste is used for automotive product applications using a twin-screw extruder. There are five variations: pure polyamide (PA), recycled polyamide (rPA), PA-rPA 50:50, PA-rPA 75:25, and PA-rPA 25:75. To be able to determine the characteristics of the mixed product, several tests were carried out, including testing the thermal properties of the final product with DSC and FTIR testing to identify functional groups. Based on the research results, it was found that all variations contained polyamide polymers, which were characterized by a melting temperature of 218.8–224.4 °C and obtained carbonyl functional groups (C=O) and secondary amine functional groups (N–H) in the FTIR test results, which indicated the presence of amide bonds in the samples.

Strategi Bauran Pemasaran dalam Meningkatkan Penjualan Wedding Package di The Anvaya Beach Resort Bali

The sales target for wedding packages at The Anvaya Beach Resort Bali in 2020, 2021 and 2023 cannot be achieved. This research aims to identify a marketing mix strategy to increase sales of wedding packages at The Anvaya Beach Resort Bali. This research uses qualitative descriptive data analysis techniques which will be analyzed using SWOT analysis with the 7P marketing mix (Product, Price, Place, Promotion, People, Process and Physical Evidence). SWOT Matrix Analysis groups internal and external factors to produce four specific strategies, namely SO, ST, WO, and WT. In the research results, there are four marketing mix strategies in increasing sales of wedding packages at The Anvaya Beach Resort Bali, namely the SO (Strength Opportunities) strategy of having a wedding venue location which is a strategy to facilitate access in holding weddings, the ST (Strength Threats) strategy of utilizing the wedding venue by promoting The beauty of each wedding location that is owned, the WO (Weakness Opportunities) strategy improves weaknesses by utilizing the potential of social media which provides information about wedding packages to companies, and the WT (Weakness Threats) strategy maximizes ecommerce to expand the reach of the target market.

WARPPLS APPLICATION FOR MARKETING MIX ANALYSIS OF CONSUMER LOYALTY WITH CONSUMER SATISFACTION AS AN INTERVENING VARIABLE AT PT BALI LUXE TRADA, BALI

This study aims to determine and analyze the effect of the 4P marketing mix (product, price, location, and promotion) on customer loyalty with customer satisfaction as an intervening variable at PT Bali Luxe Trada, Bali. This type of research uses quantitative research methods with the population in the study, namely customers of PT Bali Luxe Trada. The sampling method used was purposive sampling using the calculation of the slovin formula of 120 respondents of PT Bali Luxe Trada. Data collection techniques include questionnaires and documentation. Hypothesis testing is done by variance-based SEM or Partial Least Square (SEM-PLS) testing with the help of the WarpPLS 8.0 program through descriptive analysis, outer model testing, inner model, and hypothesis testing. The results of the analysis obtained show that partially the variables of product, price, location have a positive and significant effect on customer loyalty and customer satisfaction. Promotions have a positive but not significant effect on customer loyalty or customer satisfaction. While on indirect influences, only product variables have a significant effect on customer loyalty through customer satisfaction of PT Bali Luxe Trada, Bali.

Modeling and Experimental Validation of Pre-Chamber Jet Penetration Considering Jet Density and Ejection Pressure Variations

Abstract Although pre-chamber (PC) is regarded as a promising solution to enhance ignition in lean-burn gas engines, a lack of comprehensive understanding of PC jet penetration dynamics remains. This study proposed a zero-dimensional (0-D) model for PC jet penetration, considering the mixing of combustion products and unburned gases and floating ejection pressure. A combustion completion degree was defined employing fuel property and heat release to estimate varying jet density. Pressure differences between PC and the main chamber (MC) were referred to as the ejection pressure. Then, this model was validated against experiments from a constant volume chamber and a rapid compression and expansion machine with CH4-H2 blends at different equivalent ratios. Results showed that the proposed model can provide a good prediction in stationary and turbulent fields with the calibrated model coefficient. The overall jet penetration exhibits a t0.5 dependence due to its single-phase characteristic and the relative lower density compared to ambient gas in MC. The flame propagation speed and heat release in PC influence the combustion completion degree at the start of jet ejection, the mass fraction of burned gas in jet increases with the equivalent ratio. Jet penetration is primarily driven by ejection pressure, with tip dynamics barely affected by the pressure difference after the peak. Tip penetration intensity increases with increased fuel equivalent ratio and H2 addition, owing to the faster flame propagation. These findings can offer useful suggestions for model-based design and combustion model development for gas engines.