bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evaluation of Hardened Properties of Ferro Geopolymer Concrete
Authors: Sai Kishore K , Lalitha G 
Published: August 2024

Abstract
Increase in growth of construction industry is eventually leading to a rise in output of Portland cement which in turn increases the pollution. This has effect on global warming. As to reduce the effect of green-house gases, sustainable materials are being used in concrete intensively. One among which is the Geo-polymer concrete (GPC). In this project steel wire mesh has been inculcated into GPC forming “Ferro Geo-polymer concrete (FGPC)”. Specimens have been cast using GPC inculcated with various layers of wire mesh. Ferro geo-polymer concrete specimens were cast with wire mesh in single and double layers and values are compared with same grade of conventional GPC specimens. Mechanical properties of G40 grade Ferro geo-polymer concrete have been studied at the age of 28, 56 and 90 days. It is found that for double layer at 90 days of ambient curing maximum percentage increase of 10.18%, 10.37% and 27.46% in compressive, split tensile and flexural strengths correspondingly. The evaluated values are compared with values of ML (MATLAB) application and achieved accuracy of more than 98%.
Geopolymer Concrete with Nano Silica: A Review on the Impact of Sodium Hydroxide Solution Molarity
Authors: Dhanashire Abhishek , Harika Mrs R , Sai Goutham R , Srinivas Y , Amith Reddy K 
Published: August 2024

Abstract
Geopolymer concrete is gaining popularity as a sustainable substitute for conventional cement concrete, primarily attributed to its reduced carbon footprint and enhanced properties. As geopolymer technology advances, ongoing research is directed towards optimizing mix designs, clarifying long-term performance traits, and broadening the material’s range of applications. The practical application of geopolymer concrete faces a limitation in the form of heat activation at different temperatures. Several studies have undertaken the use of nanoparticles to overcome this constraint in optimal proportion. This review provides a thorough examination of the recent research on the integration of nano silica in geopolymer concrete, while also exploring the impact of varying sodium hydroxide solution molarity levels on microstructures and mechanical properties. The findings suggest that the inclusion of an appropriate percentage of nano silica enhances various properties of geopolymer concrete. As the molarity increases it is evident that, properties such as compressive strength, tensile strength, flexural strength, and bond strength exhibit parallel improvements. Upon analyzing various studies, 14M NaOH solution with alkaline-to-binder ratio of 0.4 exhibited superior performance. An accelerated rate of polymerization and the conversion of amorphous compounds into crystalline ones are revealed by applying highly reactive analytical techniques such as XRD, SEM and EDS to geopolymer concrete.
Sustainable mix design for 3D printable concrete
Authors: Mahanthi S , Kantarao M , Uma Maheswara Rao S , Niharika M , Munnisa Sk Shami 
Published: August 2024

Abstract
3D concrete printing is a new building process that has great potential for the construction industry in terms of optimizing construction time, cost, design flexibility, error reduction, and environmental factors. The most influential factor that determines successful printing is the concrete mix. This study focuses on designing a sustainable 3D printable mix and further examining its fresh and hardened mechanical properties. This study concentrated on the performance requirements for 3D printable concrete, which include printability, extrudability, and buildability. The trail mixes are conducted using cement, fine aggregate, and water. Crucial components like GGBS, fly ash, and crystalline silica are replaced with cement to improve the performance of the concrete mix. The mechanical and fresh properties of the 3D printable mix are examined using compressive and unconfined uniaxial compression tests. The early-age strength of the trail mixes was assessed using the unconfined uniaxial compression test. The findings showed that the best mix could withstand deposited layers for 60 minutes after adding water to the binder. The mix containing cement, fly ash, GGBS, silica, sand, and water is the optimal mix. The compressive test of the printed specimen revealed that it attained 44.5% and 23% more strength compared to other mixes. The inclusion of crystalline silica is the reason behind increased compressive strength and an inter-layer bond between the layers.
Study on Influence of Brine Solution on swelling Behaviour of Expansive soil
Authors: Yantrapalli Sudheerkumar , Noolu Venkatesh , Priyam N. B , Anitha K , Hari Krishna P 
Published: August 2024

Abstract
Clay soils show considerable variations in their behaviour with changes in the pore-fluids. Contaminations from potash industries and leakages from oil and gas industries, underground petrol storage tanks, nuclear repositories and leachates from municipal and hazardous waste landfills can often introduce new pore–fluids into the soil. Brine is a solution of salt in water and finds many commercial uses in industries. Sodium Chloride (NaCl) is one important constituent that can come into contact with soil from the above–mentioned sources. The present study aims at finding the physicochemical and index properties of brine – infused black cotton soils from Telangana region. Studies on the index properties of clay – brine interactions with different concentrations of NaCl solution (0.4M, 2M and 4M) indicate that brine contamination has noticeable effects even in lime modified soils.
Investigation of dolochar-stabilized stone columns incohesive soils: implications for foundation design
Authors: Panda H , Sahu R , Giri D 
Published: August 2024

Abstract
Stone columns, a ground improvement technique, can enhance load-bearing capacity and reduce settlements but often lack sufficient friction and bonding with cohesive soils. Dolochar, a novel cementitious additive derived from the sponge iron industry, presents promising potential in addressing these limitations. This study investigates the effectiveness of dolochar-stabilized stone columns in improving the performance of foundation. Undisturbed clay samples with varying liquidity indices (IC) of 0.3, 0.65, and 0.8 were collected and characterized through a comprehensive suite of geotechnical tests, including specific gravity, dry and wet sieve analysis, liquid and plastic limit, compaction test, triaxial compression test, and direct shear test. Stone columns fabricated with different dolochar at L/D Ratios of (2.5, 4, 6 & 8) were installed in prepared soil specimens within a pressure-controlled apparatus at varying different percentages of dolochar (5%, 10%, 15%, 20%, 25%, and 30%) relative to the soil area. At each and every percentage settlement of the column has been observed at mentioned liquidity-indices on dolochar treated stone columns and surrounding soil to evaluate their mechanical behavior. The influence of dolochar and area replacement ratio on the overall system performance was observed, with higher dolochar content and larger replacement ratios leading to greater stiffness and reduced settlements.
Experimental investigation on partial replacement of coconut shells as coarse aggregate and rubber as fine aggregate in concrete
Authors: Kruthika Kancharla , Suma Yarlagadda , Tej Naik Mude Amar , Chowdary Nekkalapu Nagini , Sai Puli Pavan 
Published: August 2024

Abstract
Concrete is the most widely used artificial material worldwide, and its production depends on the availability of components like sand, granite, and cement. The prices of these materials have significantly increased in recent years. This study investigates the effect of using coconut shells (12mm – 16 mm) as the coarse aggregate and rubber (4.75 mm) as the fine aggregate in concrete. The concrete was intended to achieve compressive strength of 40 N/mm2, with coarse aggregate replacing coconut shells and fine aggregate replacing rubber at 5%, 10%, and 15% by weight. According to the study, 5% is the optimum amount of coconut shell to replace coarse aggregate with. The optimal replacement percentage of fine aggregate with rubber is 5%. Therefore, tests will be conducted on all of the aforementioned samples to determine their different characteristics, including compressive strength, split tensile strength, RCPT test, and sorptivity test.
Reviewing the potential of waste paper incorporation in enhancing concrete sustainability
Authors: Birajdar Roopadevi B , Babu Chittela Vijaya , Ganta Mounika , Nagaraja Kandagal , Santhoshi Yerragolla Mailikol 
Published: August 2024

Abstract
Concrete is made from a mix of aggregate, sand, water, and cement. Waste Paper Concrete (WPC) is a mix of concrete and Waste Paper (WP). Every year, WP production slowly goes up. Because of this, more space is needed for disposal sites, which use energy, use up natural resources, and make the world dirtier. By using WP in concrete, pollution in the environment could be cut down. So, this review paper looks at what can be done with WP by replacing fine aggregate, coarse aggregate, and cement in concrete at 0%, 5%, 10%, 15%, and 20%. This study talks about the physical and chemical properties of the WP. This study also looks at the fresh, mechanical, and structural characteristics of WPC, like slump, modulus of elasticity and stress-strain relation. Based on this review, the fresh, mechanical, and structural characteristics of concrete improve when WP is added at 5% and 10%, but they get worse when WP is added at more than 10%. The SEM shows that there are some pieces of wet cement. When adding 10% WP, the hydrated cement particles are inclined to improve the strength of the concrete more than when adding 5% WP. It’s clear that adding WP to regular concrete, which doesn’t have any waste paper in it, gives it a lot of good qualities that regular concrete doesn’t have. By improving its properties and efficiency, WP could have the right qualities to be used in making concrete.
Mechanical and durability performance of bentonite clay blended cement composites - A Review
Authors: Ruthik B. , Praseeda D. 
Published: August 2024

Abstract
Cement plays a crucial role as a binder in concrete production. With the evolving population, there is tremendous development happening all over the world in terms of infrastructure which is mostly of concrete. With this development, there is also a greater dependency on the cement. As known cement production contributes to the emission of greenhouse gases which cause harm to the environment. To overcome this problem to some extent, supplementary cementitious materials play a greater role. Materials that are mostly used as partial replacements for cement are the by-products of various industries such as fly ash, GGBS, spent pot lining, etc. There is also another material called Bentonite clay which can be used as a supplementary cementitious material as a partial replacement to cement. However, the study is limited owing to its properties such as its swelling nature etc. So, this paper reviews the feasibility of the utilization of bentonite clay as one of the materials as a partial replacement for cement in the production of concrete. This paper mainly reviews the mechanical properties and durability performance of bentonite-modified cement composites. It has been observed from the studies carried out that there is an enhancement in the mechanical properties and durability performance with the utilization of Calcined bentonite clay as a partial replacement for cement. The optimum dosage of the utilization of the bentonite clay was found to be in the range between 20-30 % by weight of the cement content.
Low cost water purifier using natural and waste material
Authors: Afreen Mohammad , Suma Yarlagadda , Sri Matta Swapna , Rohit Gorle , Ashish Raju Jangam Dev 
Published: August 2024

Abstract
The initial exploration of an affordable water purification system led to the creation of a novel water purifier crafted from natural and discarded materials, along with a budget-friendly filtration unit. Velagapudi Ramakrishna Siddhartha Engineering College in Kanuru, Vijayawada, innovatively designed this low-cost filtration device. The primary objective is to diminish the reliance on potable water by establishing a new source through the reuse of wastewater. The wastewater treatment process involves the utilization of coconut shells, corn cobs, sugar cane pulp, charcoal, intact sea shells, pebble stones, aiming to enhance the quality of treated wastewater. Employing recycled wastewater for activities like gardening and flushing emerges as an effective strategy for water conservation and the promotion of sustainability.
Physicochemical quality investigation and sustainable management of first biodiversity heritage site in India
Authors: Soumya Kiran P 
Published: August 2024

Abstract
Earth is empowered with an astounding variety of living organisms in only one part if whole earth’s mass is divided into 10 billion parts which means whole diversity restricted to just about a kilometer thick layer of soil, water and air. Biodiversity heritage sites are well defined areas known for their unique and complex ecosystems. Ameenpur lake situated in Sangareddy District near outskirts of Hyderabad, Telangana state is a first water body in India declared as Biodiversity heritage site in November 2016 by Ministry of Environment under section 37 of National Biodiversity Act 2002 known for its unique faunal biological diversity. Lake is being deteriorated by effluents discharged from industries, domestic sewage, and agricultural runoff from surrounding zones of Ameenpur. Haphazard urban development, Human encroachment and industrialization are the main causes for declining water quality of lake which making lake to lose its unique identity. Present study deals with determining physicochemical quality parameters which includes turbidity, Total Solids, Total Dissolved Solids, pH, Total Hardness, Alkalinity, chlorides, Nitrates, sulphates, Dissolved Oxygen, Biochemical Oxygen Demand, Chemical Oxygen Demand etc as per IS 3025(1987) and comparing with recommended surface water quality standards as per IS 2296, drinking water permissible limits adopted by BIS as per IS10500. Present research extends to study recommend sustainable management approaches and suggest few for enhancement of water quality in lake without posing harm to aquatic life by bringing quality parameters nearer their permissible limits.
Effect of stack geometry and operating frequency on performance of thermoacoustic refrigeration
Authors: Jadhav Pravin V. , Mehta Girish D. , Sakhale Chandrashekhar N. 
Published: August 2024

Abstract
Different researches have given a broad canvas about investigation of performance of thermoacoustic refrigeration system (TARS) considering geometrical changes in stack, resonator tube and different operating parameters including gas pressure, working medium, frequency and temperature gradient. Limited work is reported involving the variation in stack geometry with different operating frequency to provide the choice of parameters for improving the performance of TARS. In present work, investigation is executed to ascertain the effect of different stack geometry and operating frequencies on the performance of (TARS) thermoacoustic refrigerator system. The difference in temperature at two ends of stack is the performance indictor of thermoacoustic systems. Three different stack geometries constructed from a Mylar sheet of 0.18 mm were used. The parallel plate stack fabricated was 0.13 mm thick and spaced 3 mm while the tubular stack had circular cross section with 3 mm diameter. Tests are performed to measure the performance of TARS for parallel, tubular, and spiral geometry of stacks with varying operating frequencies at the tune of 200 Hz, and 400 Hz, at 2 bar operating pressure with helium gas. From the investigation it is speculated that, the tubular type stack geometry gives improved results, whilst the increased operating frequency had a considerable impact on the temperature achieved at lower and high temperature heat exchangers. Experiments showed that the tubular stack achieved the lowest minimum temperature among the three geometries considered. Temperature achieved for lower temperature heat exchanger were 20.5 °C and 20 °C with tubular stack at 200 Hz and 400 Hz followed by parallel stack as 29°C and 22.8 °C and spiral stack as 28.7 °C and 25.1 °C respectively at 200 Hz and 400 Hz frequencies. The maximum temperature difference between lower and high temperature heat exchanger observed was of 22 °C for tubular stack geometry followed by parallel and spiral stack geometry.
Design of multiphase BUCK DC-DC converter chip
Authors: Fu Mingshuo , Dai Lan 
Published: August 2024

Abstract
This article proposes a design of a multiphase BUCK-type DC-DC voltage converter. This buck converter allows for a high input voltage range from 3 V to 22 V and integrates two voltage modes, namely pulse width modulation control and input feedforward synchronous buck PWM control, to control dual independent voltage regulators or two-phase single output regulators. This type of step-down converter adopts multiphase cascade technology, which can effectively reduce output voltage ripple and increase output current. Multiphase cascade technology utilizes the controller to output ripples with different phases, interleaving and paralleling the ripple, ultimately reducing the ripple and improving the conversion efficiency of the controller with high stability.
A Sub-1V High PSRR Bandgap Voltage Reference with Temperature Compensation for Low Dropout Regulator
Authors: Wu Yufei , Guo Aiying , Zhang Jianhua 
Published: August 2024

Abstract
In this paper, a sub-1V high Power Supply Rejection Ratio (PSRR) Bandgap Voltage Reference with temperature compensation is presented to provide a reference voltage for the Low Dropout Regulator (LDO). This bandgap can compensate the output circuit through a temperature compensation structure, which outputs a sub-1V reference voltage and has a low-temperature coefficient. The 55 nm CMOS process is used for design and simulation. The temperature range is 165°C (-45°C∼120°C). At the TT process corner, when the typical voltage value is 2.5 V, the Temperature Coefficient (TC) is 4.751 ppm/°C, and the PSRR is up to -107 dB at low frequencies.
A Low-temperature drift bandgap reference circuit with startup enhancement and high currents driving
Authors: Chen Fengli , Zhang Tao 
Published: August 2024

Abstract
Based on the H*C 0.18 μm BCD process, this paper uses a low-temperature drift bandgap reference circuit with startup enhancement and high currents driving. The circuit employs a startup enhancement circuit to ensure its capability of driving high currents while preventing the circuit from entering metastable states. The simulation results demonstrate that under the TT process corner, the bandgap reference can operate at a supply voltage of above 1.6 V. When driving a high current, the output remains stable at 1.2 V. In the temperature range of -40°C to 140°C, the temperature coefficient reaches 6.5×10-6/°C.
Design of refrigerated micro-flow thermal mass flow controller
Authors: Lv Jiawen , Zhang Wang , Sui Xuejun 
Published: August 2024

Abstract
The article addresses the problems of low linearity, poor reliability, and susceptibility to environmental and other factors in the measurement of small flow rates by liquid mass flow meters in industry and designs a refrigeration-type thermal mass flow controller without making the device large-scale. Adopting a microprocessor and pt1000 temperature sensor, the semiconductor refrigeration sheet utilizing the Peltier effect makes the temperature difference of the flowing liquid so as to measure the liquid mass flow rate by obtaining the temperature data and analyzing the data in order to achieve the function of flow rate measurement, so as to realize the purpose of flow rate measurement and control. By keeping the heating element and the measured fluid temperature difference constant after constant power work, measuring the fluid temperature after heat transfer, and finally detecting the voltage connected to the platinum resistor to react to the fluid flow. After preliminary testing in non-extreme environments, it is proved that the system has the characteristics of low cost and low power consumption, which is of reference value for the development and application of embedded systems and provides an effective method for the measurement of micro-flow liquids.
Performance simulation and analysis of the orthogonal frequency discriminator
Authors: Wang Hongxia , Guo Yueting , Qin Jinguo 
Published: August 2024

Abstract
The orthogonal frequency discrimination is achieved by utilizing waveform transformation in the phase-shift multiplier frequency discriminator. Firstly, the constraint relationship is derived between the circuit parameters of the phase shifter and the maximum frequency spectrum of the input FM signal. Subsequently, the demodulation system for the input FM signal is designed using a combination of a phase shifter and multiplier. Finally, the maximum frequency offset range of distortion-free output from the frequency discriminator is analyzed, and the influence of resistance and capacitance parameters in the phase-shift network on the input frequency offset range is researched using parameter scanning analysis. Theoretical derivation analysis and simulation testing confirm that this designed circuit can effectively demodulate FM signals with a wide range of non-distortion when the circuit parameters match those of input signals. This circuit simulation method has been proven to visually demonstrate different output waveforms under various parameter settings, thereby facilitating the visualization of abstract theoretical knowledge.
State-of-the-art bias correction of climate models misrepresent climate science and misinform adaptation
Authors: Chandel Vikram Singh , Bhatia Udit , Ganguly Auroop R , Ghosh Subimal 
Published: August 2024

Abstract
Quantile mapping based bias correction and spatial disaggregation (BCSD) have emerged as the de facto standard for rectifying bias and scale-mismatch in global climate models (GCMs) leading to novel climate science insights and new information for impacts and adaptation. Focusing on critical variables crucial for understanding climate dynamics in India and the United States, our evaluation challenges the premise of BCSD approach. We find that BCSD overcorrects GCM simulations to observed patterns while minimizing or even nullifying science-informed projections generated by GCMs. Furthermore, we show that BCSD incorrectly captures extremes and complex climate signals. Our evaluation in the context of the Walker circulation suggests that this inability to adequately capture multivariate and spatial-temporal dependence patterns may at least partially explain the challenges with BCSD.
Training quantum neural networks using the quantum information bottleneck method
Authors: Çatlı Ahmet Burak , Wiebe Nathan 
Published: August 2024

Abstract
We provide in this paper a concrete method for training a quantum neural network to maximize the relevant information about a property that is transmitted through the network. This is significant because it gives an operationally well founded quantity to optimize when training autoencoders for problems where the inputs and outputs are fully quantum. We provide a rigorous algorithm for computing the value of the quantum information bottleneck quantity within error ε that requires

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