bluuebunny/crossref_metadata_2025 huggingface dataset:
Non-Invasive Management of Initial Occlusal Enamel Caries using Silver Modified Atraumatic Restorative Technique and Resin-Based Sealants: A Randomised Comparative Split-Mouth Clinical Trial
Authors: Patel Megha , Bhatt Rohan , Patel Chhaya , Joshi Kaushal , Patel Foram , Makwani Disha
Published: May 2023

Introduction:

Recently, child-friendly non-invasive or minimally invasive approach with the primary goal of preserving tooth structure, the best possible has gained momentum in management of caries disease as compared to conventional invasive surgical approach. The clinical relevance of antimicrobial and remineralising benefits of silver diamine fluoride (SDF) along with atraumatic restorative treatment in managing non-cavitated lesions is yet to be established. This research was conducted with the aim to compare the efficacy of novel silver modified atraumatic restorative technique (SMART) sealants to the gold standard resin-based sealants in managing occlusal enamel caries.

Methodology:

A total of 66 children with at least one pair of fully erupted contralateral first permanent molars with ICDAS II codes 1 and 2 were randomly allocated for this split-mouth study into two groups: Group - SMART sealant and Group – resin-based sealant. The sealants were applied according to the American Academy of Paediatric Dentistry guidelines and were evaluated at the end of 3rd, 6th, and 12th months. The clinical performance of sealants was gauged based on their retention and caries preventive effect. The data were statistically analysed using the Chi-square test at significance level P < 0.05 using SPSS, IBM version 23.0.

Results:

At 12 months’ follow-up, 60.65% teeth in the resin group and 49.18% in SMART group had fully retentive sealants (P = 0.02). The caries occurrence at the end of the study was 8.19% in SMART as compared to 21.31% in resin sealant group and was statistically significant (P = 0.041).

Conclusion:

The resin-based sealants were more retentive as compared to SMART; however, the SMART sealants were superior in preventing caries. The use of SDF beneath GIC in atraumatic restorative sealants can provide protective effect against caries occurrence in the absence of sealant retention.
Regional Anesthesia for a Patient with Extensive von Recklinghausen's Disease
Authors: Kaur Hersimran , Garg Sahil , Gupta Ritu , Yadav Tamanna , Prasad Seema
Published: May 2023

We report the case of a 60-year-old male posted for surgery on the left inner thigh mass with extensive neurofibromas covering the whole body. The patient was administered a subarachnoid block at L3-L4 level for excision of the mass on the left inner thigh. There were no postoperative anesthetic complications. This case report aims to highlight the importance of regional anesthesia in patients with neurofibromatosis and its anesthetic implications.
Crying blood: Hemolacria
Authors: Sharma Ria , Moharana Bruttendu , Sarkar Deepayan , Sharma Bhavana
Published: May 2023

Although alarming for the patient, hemolacria is often harmless and self-resolving. Investigations and management must be streamlined according to the symptoms and the presence of any systemic disease. A psychiatric evaluation may be required in patients to rule out psychological causes. No definitive cause can be found in many cases. We evaluated a 10-year-old child with hemolacria. No organic cause was found. A psychiatric evaluation revealed attention-seeking behavior during the prolonged COVID-19 lockdown. The frequency of similar episodes reduced after counseling and we conjectured that psychiatric counseling helped reduce the symptoms in this case.
Thyroid disorders in pregnancy
Authors: Rajput Rajesh , Bajaj Sarita , Ghosh Sujoy , Kalra Pramila , Menon Arun S. , Pillai Minni G. , Kumar Prasanna , Joshi Shashank , Seshadri Krishna , Jayakumar R. V. , Ganie Mohd Ashraf , Puttiyaveettil Jabbar , Gupta Sushil , Rao Hema Girish
Published: May 2023

Thyroid disease is the second most common endocrine disorder encountered in pregnant women with substantial maternal and fetal implications. Therefore, assessing thyroid status during pregnancy is essential for initiating treatment in newly diagnosed individuals and adjusting doses for those already under treatment. To initiate proper and timely treatment evidence-based recommendations are required for clinical decision-making in managing thyroid disorders in pregnant and postpartum women. Keeping this in mind, task force consisted of experts in the fields of endocrinology and thyroid disease was constituted and various published data and guidelines were explored to address screening, diagnosis, and management of hypothyroidism, thyrotoxicosis, GD, thyroid nodules, and post-partum thyroiditis and their related complications during pregnancy. This document provides much-required insights and useful, practical, and accurate guidance that aids a practicing clinician.
Can Dietary Hazelnut Oil Inclusion Alleviate the Negative Effects of Oxidized Fish Oil in Rainbow Trout (Oncorhynchus mykiss) Juveniles?
Authors: Tacer-Tanas Seyda , Arslan Murat
Published: May 2023

Rainbow trout juveniles were fed different levels of fresh fish oil, oxidized fish oil and fresh hazelnut oil for 9 weeks. Growth performance and feed efficiency was significantly influenced by oxidized fish oil (P<0.05), but not by hazelnut oil supplementation and their interaction. Fish fed diets containing fresh fish oil had better growth and feed efficiency than those fed diets containing oxidized fish oil. Digestibility decreased with the increase in both dietary oxidized fish oil and hazelnut oil. Fatty acid profile in whole body lipids was significantly influenced by the experimental diets (P<0.05). Polyunsaturated fatty acids (PUFA) showed significant decrease with both dietary hazelnut oil inclusion and dietary oxidized fish oil. Dietary hazelnut oil resulted in a significant increase in hepatic vitamin E and a significant decrease in lipid peroxidation level (P<0.05). Our overall results suggested that dietary oxidized lipids caused growth depletion, lowered nutrient digestibility, lipid peroxidation, and decreased eicosapentaenoic acid (EPA; 20:5n-3) and docosahexaenoic (DHA; 22:6n-3) levels in rainbow trout. However, dietary hazelnut oil inclusion alleviated the negative effects of oxidized oil, sparing n-3 long-chain PUFAs such as EPA and DHA, and increasing hepatic α-tocopherol level which lowered lipid peroxidation despite no significant impact on growth.
A Near-Term Path to Assured Aerial Autonomy
Authors: Bartlett Paul , Chamberlain Lyle , Singh Sanjiv , Coblenz Lauren
Published: May 2023

Autonomy is a key enabling factor in uncrewed aircraft system (UAS) and advanced
air mobility (AAM) applications ranging from cargo delivery to structure
inspection to passenger transport, across multiple sectors. In addition to
guiding the UAS, autonomy will ensure that they stay safe in a large number of
off-nominal situations without requiring the operator to intervene. While the
addition of autonomy enables the safety case for the overall operation, there is
a question as to how we can assure that the autonomy itself will work as
intended. Specifically, we need assurable technical approaches, operational
considerations, and a framework to develop, test, maintain, and improve these
capabilities.

We make the case that many of the key autonomy functions can be realized in the
near term with readily assurable, even certifiable, design approaches and
assurance methods, combined with risk mitigations and strategically defined
concepts of operations. We present specific autonomy functions common to many
civil beyond visual line of sight (BVLOS) operations and corresponding design
assurance strategies, along with their contributions to an overall safety case.
We provide examples of functions that can be certified under existing standards,
those that will need runtime assurance (RTA) and those that will need to be
qualified with statistical evidence.
A Method for Measuring In-Plane Forming Limit Curves Using 2D Digital
Image Correlation
Authors: Agha Akshat , Abu-Farha Fadi
Published: May 2023

With the introduction of advanced lightweight materials with complex
microstructures and behaviors, more focus is put on the accurate determination
of their forming limits, and that can only be possible through experiments as
the conventional theoretical models for the forming limit curve (FLC) prediction
fail to perform. Despite that, CAE engineers, designers, and toolmakers still
rely heavily on theoretical models due to the steep costs associated with
formability testing, including mechanical setup, a large number of tests, and
the cost of a stereo digital image correlation (DIC) system. The international
standard ISO 12004-2:2021 recommends using a stereo DIC system for formability
testing since two-dimensional (2D) DIC systems are considered incapable of
producing reliable strains due to errors associated with out-of-plane motion and
deformation. This work challenges that notion and proposes a simple strain
compensation method for the determination of FLCs using a low-cost single-camera
(2D) DIC system. In this study, formability tests are performed on an
automotive-grade 6xxx series aluminum alloy using the Marciniak in-plane FLC
testing method. The tests are performed on a custom setup that enables
simultaneous optical strain measurements using a stereo DIC as well as a 2D DIC
system. The results show how 2D DIC FLC points match those obtained by stereo
DIC using two popular FLC approaches: ISO 12004-2 section-based spatial method
and a time-dependent linear best fit (LBF) method.
Automotive Steering System and Its Controller Design for Intelligent
Vehicles
Authors: Zhao Yibing , Chen Yuqiao , Lv Yanqing , Guo Lie
Published: May 2023

With the rapid development of intelligent vehicles technology, it is extremely
urgent to solve environmental pollution and energy crisis. The electric
intelligent vehicles technology can accelerate the world to move towards low
carbonization and intelligence. In this article, one automatic steering system
and its controller are designed with this electric vehicle as the verification
platform. First, based on the digital mock-up (DMU) module of the CATIA digital
prototype, the motion simulation of the automatic steering system is carried
out. Then, the transient dynamics and fatigue analysis module from ANSYS
Workbench 16.0 software is used to simulate and analyze the transmission
mechanism. After verifying the reasonable strength of the real vehicle parts,
the original platform steering system is reformed. Our intelligent vehicle uses
a monocular charge-coupled device (CCD) to detect road marking lines and then
employs a linear two degrees of freedom (2-DOF) vehicle model to establish a
preview deviation model based on the visual navigation lane lines. A vehicle
lateral control method combining fuzzy logic rules, adaptive
proportional-integral-derivative (PID) control strategy, and preview deviation
is designed. A lateral controller is built using Simulink software for lane
tracking simulation, and a good tracking effect is obtained. Finally, the
results of low-speed real vehicle tests show that the vehicle can stably track
the target lane line at low-speed conditions.
Computational Material Modelling for Damage Prediction of Advanced High Strength Steel
Authors: Mulla Suhail Mahanmad Hanif , Nemade Sanket , Vhanaje Manoj G , Nigade Sachin Rajendra , Mahajan Rahul , Santosh Jambhale Medha
Published: May 2023

FEA based simulations are extensively used in automotive industry for improving the product design and reducing the time taken for design and prototyping. FEA based simulations require material data as an input in form of material models. Most commonly used material models for simulation of metallic materials are elastic models and elasto-plastic models, which provide very good correlation till ultimate tensile strength (UTS). For simulation beyond UTS value, elasto-plastic material model has to be used along with material model considering the damage accumulation post UTS. For crash like event in automotive crash, required material models should consider the effect of various stress state conditions (Triaxiality) and strain rate sensitivity of materials along with damage accumulation. In LS Dyna solver, MAT_ADD_EROSION material model (GISSMO) along with MAT_024 is widely used for these applications.

This paper will focus on development of GISSMO material model card for advanced high strength steel. Various stress state conditions will be considered along with strain rate sensitive properties. Paper will also cover the MAT_024 material model card which is used in association with MAT_ADD_EROSION for elasto-plastic region. Simulated data of coupons and component will be validated with experimental results.
Importance of Metallurgical Properties to Prevent Shaft Failures in Off-road Vehicle Validation
Authors: Karthikeyan C. , Venugopal Sivakumar , Gopalan Vijaysankar
Published: May 2023

Globally, automotive sector is moving towards improving off-road performance, durability and safety. Need of off-road performance leads to unpredictable overload to powertrain system due to unpaved roads and abuse driving conditions. Generally, shafts and gears in the transmission system are designed to meet infinite life. But, under abuse condition, it undergo overloads in both torsional and bending modes and finally, weak part in the entire system tend to fail first. This paper represents the failure analysis of one such an incident happened in output shaft under abuse test condition. Failure mode was confirmed as torsional overload using Stereo microscope and SEM. Application stress and shear strength of the shaft was calculated and found overstressing was the cause of failure. To avoid recurrence of breakage, improvement options were identified and subjected to static torsional test to quantify the improvement level.
Water Intrusion in Automotive Door Latches Using SPH Method
Authors: Kaushik Achala , Krishnamurthy Harish , Gajendra Harish , Calamaco Eli
Published: May 2023

An automotive door latch that functions manually or electronically is a vital component of a door closure system. It primarily aims to provide security of the occupants by securing the door system by ensuring timely locking and unlocking of the doors. A wide range of factors like safety, ergonomics, and security influence the development of these latches to eliminate safety. With the growing trend and advancements, automotive electronics is becoming more complex and prevalent. Hence, any exposure of electrical/electronic components to water make them susceptible to short circuits, corrosion etc., thereby may make it the functionality of systems and increasing the chances of failure in these devices. Intrusion of water possible into the latch system can be disastrous depending on the climatic conditions. Stringent safety criteria have given rise to unconventional test methods that are time-consuming and hence necessitate virtual validation techniques. Virtual validation becomes a viable option and with proper correlation work it helps to address these types of problems at low cost and in early stages of product development The latch is subjected to an impact by a jet of water, modelled using Smoothened Particle Hydrodynamics (SPH) technique. SPH is a mesh-free method used to simulate fluid flow and has found its application in many engineering problems & fluid structure interaction (FSI) models. Since it can handle problems involving free surfaces, deformable boundaries, moving interfaces, extremely large deformation, and crack propagation, this was found to be an ideal technique for simulation. Water is made to impinge on the latch assembly and the/those water accumulated regions observed in the simulation were compared with the test results which are found to have good correlation. A design modification was suggested to prevent/minimize water ingression into the system which was further analyzed and proved to be efficient based on the FSI methodology.
Design and Development of Fuel Tank for High Mobility Military Vehicle
Authors: KUMARAN RAJASEKAR , m vadivelu , SG Arun , Adepu Rakesh , KC satheesh
Published: May 2023

Fuel tank is considered as safety component in the vehicle, and it has to be tested to meet the safety requirements as per AIS 095. Earlier, fuel tanks were manufactured by using Hot dipped cold rolled steel material and the weld zones are applied with Anti-corrosive coating. Few fuel tanks were reported with Corrosion problems. The root cause analysis was carried out considering the raw material, manufacturing process, transpiration, storage and usage. As an improvement, the new fuel tank is designed to eliminate the limitations of the existing fuel tank. 3D modeling was done to check space and mounting requirement in the layout and used for volume calculations. FE analysis was performed to check structural stability. Emphasis given on Interchange-ability to cater the new fuel tanks in place of old as spares requirement. The fuel tank has developed with Alumina steel material. Alumina steel is a material with the strength property of steel and corrosion resistant property of Aluminium. The complete manufacturing process has critically studied and new check points and inspection stages were introduced. The Limitations of existing fuel tank has been taken in to consideration and the additional new features were introduced. After successful development, the fuel tank has submitted to M/s Global Automotive research centre for Type approval. The Alumina steel fuel tank underwent hydraulic test and over turn test as per AIS 095: 2007 and type approval obtained. The fitment and functional test was carried out on vehicle and regularized as a standard fitment.
Design, Material Selection, Simulation and Manufacturing of ROPS and FOPS for Motor Grader
Authors: Varadaraj Kumar , hs Satish Chandra
Published: May 2023

Motor grader is self-propelled, versatile machine widely used for road construction and maintenance in mining and construction applications. It required working in rugged terrain with uneven and slippery surfaces. Probability of rollover in motor grader is more due to the vehicle profile and high centre of gravity.

In light of the above, Roll over Protective Structure (ROPS) is essential to safe guard the operator from any fatal injuries / life during the operation of the equipment at different terrain conditions. Considering DGMS (Directorate of General Mines and safety) requirements, a rugged two post Rollover Protective Structure (ROPS) was designed as per ISO 3471 criteria for ROPS and Falling object Protection Structure (FOPS) as per ISO 3449

Material selection for ROPS and FOPS is one of significant factor in design process by meeting the design criteria. It should have dual characteristic, firstly, it is expected to tough enough to withstand sudden impact forces. Secondly, it should flexible enough to absorb the majority of energy during roll-over accident

A 3D model of the Roll over Protective Structure along with FOPS was created and the structure was analyzed using implicit finite element analysis (FEA) software to determine the force-displacement characteristic of Roll over Protective Structure.

Material performance requirement, Design and Simulation activities were studied. The Roll over Protective (ROPS) and FOPS Structure for Motor grader was manufactured and fitted on the equipment.
Severe Plastic Deformation Treatment for Geometry and Residual Stress Modification of Weld Toe
Authors: Chauhan Shiv , Dhadange Ravi , Ponkshe Shripadraj , Shende Deodatta
Published: May 2023

Structural automotive components are subjected to fatigue damage under cyclic stresses and strains. The fatigue damage initiates at stress levels lower than the elastic limit of the material and results in cracks. The Initial fatigue cracks are difficult to detect, such cracks can develop rapidly and cause sudden and brittle failure in structures. Many structural automotive components are fabricated involving weld induced local conditions such as geometry of weld toe and localized tensile residual stresses. These conditions are favorable for initiation of fatigue damage at weld toe.

In current work, sever plastic deformation (SPD) which is based on high frequency impact treatment using ultrasound energy was applied on weld toe of representative weld joints. The effect of SPD on weld toe geometry modification, microstructure and residual stresses were evaluated. Microscopic and X-ray diffraction techniques were used to study the effects of SPD. It was observed that SPD can significantly refine the weld toe geometry and induce compressive residual stresses, which can potentially improve fatigue life of weld joint.
Test Method for Measuring Power Consumption of Hydraulic Pumps for Trucks and Buses
Authors:   Truck and Bus Aerodynamics and Fuel Economy Committee
Published: May 2023

This document covers evaluation techniques for determining the power consumption characteristics of engine driven hydraulic pumps used on heavy-duty trucks and buses. The testing technique outlined in this SAE Recommended Practice was developed as part of an overall program for testing and evaluating fuel consumption of heavy-duty trucks and buses. The technique outlined in this document provides a description of the test to be run to determine power consumption of these engine driven components, the type of equipment and facilities which are generally required to perform these tests are discussed in SAE J745. It is recommended that the specific operating conditions suggested throughout the test be carefully reviewed on the basis of actual data obtained on the specific vehicle operation.
Recommended Practice for Braking, Stability, and Control Performance Test Procedure for Air-Brake-Equipped Trucks and Buses
Authors:   Truck and Bus Brake Systems Committee
Published: May 2023

This Recommended Practice provides a road test procedure for trucks and buses, to evaluate their compliance with Federal Motor Vehicle Safety Standard (FMVSS) 121; Air Brake Systems. Units of measure are English in lieu of metric to be consistent with FMVSS 121.
Connections for General Use and Fluid Power Ports and Stud Ends with ASME B1.1 Threads and O-Ring Sealing Part 3: Light-Duty (L-Series) Stud Ends
Authors:   Hydraulic Tube Fittings Committee
Published: May 2023

This part of SAE J1926 specifies dimensions, performance requirements, and test procedures for adjustable and nonadjustable light-duty (L series) stud ends with ASME B1.1 threads for use in fluid power and general applications and the O-rings used with them.

Stud ends in accordance with this part of SAE J1926 may be used at working pressures up to 35 MPa for nonadjustable and adjustable stud ends. The permissible working pressure depends upon materials, design, working conditions, application, etc.

For threaded ports and stud end specified in new designs for hydraulic fluid power applications, only ISO 6149 shall be used. Threaded ports and stud ends in accordance with ISO 1179, ISO 9974, and ISO 11926 shall not be used for new design in hydraulic fluid power applications.

Conformance to the dimensional information does not guarantee rated performance. Each manufacturer shall perform testing according to the specification contained in this document to ensure that components made to this document comply with the performance rating.

Appendices A and B of this document are informative.
Standard Reference Elastomers (SREs) for Characterizing the Effect of Liquids on Vulcanized Rubbers
Authors:   Committee on Automotive Rubber Specs
Published: May 2023

This SAE Standard specifies requirements for vulcanized rubbers in sheet form for use as standards in characterizing the effect of test liquids and service fluids. The appendices contain the standard reference elastomer formulas.

The property changes of the SRE in contact with the indicated fluid under specified test conditions are the responsibility of the user. See 7.3 and Table 1.

This standard is not designed to provide formulations of elastomeric product compositions for actual service.
Design Review Based on Failure Modes (DRBFM)
Authors:   Automotive Quality and Process Improvement Committee
Published: May 2023

SAE J2886 Design Review Based on Failure Modes (DRBFM) Recommended Practice is intended for Automotive and Non-Automotive applications. It describes the basic principles and processes of DRBFM including planning, preparation, change point FMEA, design reviews, decisions based on actions completed, and feedback loops to other processes, such as design, validation and process guidelines (Appendix B - DRBFM Process Map).

The intent of each fundamental step of the DRBFM methodology is presented. It is intended for use by organizations whose product development processes currently (or intend to) use Failure Mode & Effects Analysis (FMEA) or DRBFM as a tool for assessing the potential risk and reliability of system elements (product or process) or as part of their product improvement processes.

DRBFM is not intended to replace FMEA however, companies interested in adopting DRBFM will benefit from the focus on specific change points and supporting engineering decisions based on detailed discussions. DRBFM is a change in company culture that requires management commitment to changing the mind set of employees to drill deep and continually ask the question “What Else”. The DRBFM user is responsible for following this recommended practice as well as corporate policies. Alternative documentation formats are provided to meet the intent of the recommended practice.
Integrated R-1234yf Refrigerant Identifier for Recovery and Recycling Equipment Used in Mobile A/C System Servicing
Authors:   Interior Climate Control Service Committee
Published: May 2023

This SAE Standard applies to refrigerant identification equipment used for identifying an acceptable level of R-1234yf purity in a refrigerant tank or vehicle MAC system labeled as containing R-1234yf, and not misidentify other refrigerants, per 5.7.
Broadband PLC Communication for Plug-in Electric Vehicles
Authors:   Hybrid - EV Committee
Published: May 2023

This SAE Technical Information Report SAE J2931/4 establishes the specifications for physical and data-link layer communications using broadband Power Line Communications (PLC) between the plug-In electric vehicle (PEV) and the electric vehicle supply equipment (EVSE) DC off-board-charger. This document deals with the specific modifications or selection of optional features in HomePlug Green PHY v1.1 (HomePlug GP1.1) necessary to support the automotive charging application over Control Pilot lines as described in SAE J1772™. PLC may also be used to connect directly to the Utility smart meter or home area network (HAN), and may technically be applied to the AC mains, both of which are outside the scope of this document.
Lumbar Flexion Test Procedure for the Hybrid III 50th Male Dummy
Authors:   Dummy Testing and  Equipment Committee
Published: May 2023

This procedure establishes a recommended practice for performing a lumbar flexion test to the Hybrid III 50th male anthropomorphic test device (ATD or crash dummy). This test was created to satisfy the demand from industry to have a certification test which characterizes the lumbar without interaction of other dummy components. In the past, there have not been any tests to evaluate the performance of Hybrid III 50th lumbar.
Vibration Test Machine and Operation Procedure
Authors:   Test Methods and Equipment Stds Committee
Published: May 2023

This SAE Recommended Practice provides procedures and information to conduct vibration (impact) tests on lighting devices and their components as well as other safety equipment used on vehicles.
Anaerobic co-digestion of agro-industrial cashew nut wastes with organic matters for biogas production: case of cashew nut hull and cashew almond skin
Authors: Sawadog Joseph B. , Barsan Narcis , Nikiema Mahamadi , Mosnegutu Emilian , Dianou Dayéri , Traore Alfred S. , Ouattara Aboubakar S. , Nedeff Valentin
Published: May 2023

The cashew nut wastes (CNW), more released in the environment by cashew nut transforming units, are underused based on bioenergy. This study aimed at evaluating the biogas production by the anaerobic codigestion of CNW with various organic feedstocks. Physicochemical parameters and lower heating value (LHV) of cashew nut hull (CH) and cashew almond skin (CS) were determined. Batch cultures of each waste, supplemented to pig manure (PM), cow dung (CD), fermentation sludge (FS), activated sludge (AS) and Macrotermes bellicosus termite gut homogenate (TGH), were performed in anaerobic and mesophilic conditions. The biogas and methane (CH4) were measured. CNW were acid (pH 5.86-6.44), with 86.80-92.38% volatile solids (VS) and slightly high carbon/nitrogen ratio (31.94-37.79). The LHV was 23.094 MJ/Kg and 18.113 MJ/Kg for CH and CS, respectively. The highest yields were retrieved with the co-digestion PM-CH (189.16 L biogas.kg-1 VS, 130.89 L CH4.kg-1 VS, and 69.2% CH4) and CD-CS (159.85 L biogas.kg-1 VS, 99.58 L CH4.kg1 VS, and 62.3% CH4). Therefore, to boost biogas and biomethane yield, it is necessary to adjust the C/N ratios to the optimal values, and maintain the pH to the neutral, and combine PM and CD as inoculum during the digestion process of CNW.
Importance de Azolla pinnata R. Br. dans la structuration des populations de macroinvertébrés de la mare aux hippopotames de Bala (Burkina Faso)
Authors: Compaore Inoussa , Sanogo Souleymane , Santi Saïdou , Bazemo Epilou , Kabre T. André
Published: May 2023

Les plantes envahissantes constituent des refuges pour plusieurs espèces de macroinvertébrés aquatiques utilisées dans l’évaluation des plans d’eau. Cette étude avait pour objectif d’évaluer l’importance de Azolla pinnata dans la structuration des populations de macroinvertébrés de la mare aux hippopotames de Bala au Burkina Faso. Ainsi, un inventaire des macroinvertébrés a été effectué sur trois types d’habitats que sont A. pinnata, d’autres macrophytes et la vase. L’échantillonnage du benthos de la vase a été fait à l’aide de la benne géologique de la bordure vers le centre. Chez les macrophytes, le filet troubleau a été utilisé. Pour chaque instrument, dix coups ont été effectués. Pour A. pinnata, tous les individus rencontrés dans la surface de balayage ont été récoltées dans le filet pour une fouille ultérieure. Au total de 5226 individus de macroinvertébrés, répartis en 53 familles et 13 ordres, ont été collectés dont 2843 sur A. pinnata, 1972 sur les autres macrophytes et 411 dans la vase. Ils étaient composés de 76,98% d’Insectes, 8,61% de Crustacés, 7,58% de Vers, 6,81% de Mollusques et 0,02% d’Arachnides. Ces résultats montrent que A. pinnata, considérée comme une espèce envahissante, constitue un refuge de choix pour les macroinvertébrés au niveau des plan d’eau.
Actes duColloque International, 21-23 septembre 2022, Bobo-Dioulasso au Burkina Faso et Bambey au Sénégal
Authors: Gatsing Donatien
Published: May 2023

No Abstract
Study and determination of rational operating ratio for percussion drilling machines
Authors: Benmoussa M. , Inel F.
Published: May 2023

In this paper, we have the percussive rotational drilling regime that is determined by the combination of the rotational speed of the tool, the axial force applied on the rock the optimal values of these parameters d epend in particular on the type of tool and on the physico mechanical properties of the rocks to be felled. The aim of the research is to improve the operating regimes of percussive d rilling machines under the conditions of the Algerian limestone quarries (Hadjar soud quarry) and to obtain a better compromise between the technical and economic indices, in order to ensure a minimum cost price for a meter of drilled hole. The experimenta l results carried that this methodology, which consists of assuming that under the concrete conditions can find the combination of the setting parameters that ensure the best techno economic indices, as well as to carpenter the cost price for a meter of dr illed holes.
Hydrogeochemistryof groundwater in Es-Sbikhat El-Mahmel basin, Khenchela (NE Algeria)
Authors: Ouldjaoui M. , Hassad S. , Dib D. , Houha B.
Published: May 2023

Es-Sbikhat El-Mahmel basin, located at the southeastern piedmont of Aures massif (Northeastern Algeria), is characterized by a semi arid condition . The sampling process was realized within 39 boreholes and wells during May 2015. Results of analysis data projected on the PCA (Principal Componet Analysis) plan which express 52.70% of variance has shown a chemical facies evolution from calcium bicarbonate water into calcium chloride water, going through a transition facies marked by calcium-sulfate to magnesium-sulfate water.Thermodynamic analysis corroborated that water rock interaction is the main process that control mineralization (dissolution precipitation, cationic exchange and anthropogenic pollution).
Effect of the sands close to the mascara region in the manufacture of self-compacting mortars
Authors: Laoufi L. , Senhadji Y. , Laoufi I. , Benazzouk A.
Published: May 2023

Sand plays a very important role during the manufacture of concrete and mortar for the need of civil engineering and building. It influences both the properties of cementary materials in the fresh state and in the hardened state. The objective of this work is the development of self-compacting mortars with the various sands existing in the region of the city of Mascara for the main study of mechanical performance. Six sands were used for this purpose: three natural sands and three crushed sands. The tests carried out during this research are: physical tests, tests in the fresh state and tests on hardened mortars. The results to which our research has led is that self-compacting mortars made with crushed sands give a granular skeleton with high compactness and superior mechanical performance compared to self-compacting mortars made with natural sands.
Temporal variation of the water quality of a permanent watercourse: case oued bousselam.
Authors: Dehbi M. , Messai-Maane S. , Sekki A.
Published: May 2023

In order to assess the degree of pollution of surface water from Boussalem river from the city of Setif, we conducted during 2014; a study of physical and chemical characteristics of surface water. The results showed that water is loaded into mineral matter in terms of electrical conductivity (Avg = 1059,18 μS/cm ± 631,7), in turbidity (Avg = 15,713 NTU ± 22,19), in TSS (Avg = 189 mg/l ± 119,5), with low dissolved oxygen (Avg = 2,98 mg/l ± 2 ,44). The pH is closed to neutrality (Avg = 7,78 ± 0,74), the temperature is 17°C ± 11,13). Also, one revealed according to the results which water of Bousselam river is bad according to the quality standards of surface water and this is directly related to factors anthropic.
Evaluation of the anticoagulant activity of margins from olives extraction in the Khenchela region
Authors: Kadi K. , Mrah R. , Hamli S. , Lekmine S. , Dib D. , Addad D. , Boukeria S , Gueboudji Z. , Hafsaoui I.
Published: May 2023

The objective of this study is the evaluation of the anticoagulant activity of polyphenols obtained from olive extracts (Olea europaea L.) Of the margines of two varieties cultivated at Khenchela (East of Algeria) , the first one is souidi from Chacher and the second one is chemlal from Baghai. The physicochemical characteristics of the two varieties studied showed a difference in water content, total solid content (dry matter), total solid in suspension, potential hydrogen, and especially its content in polyphenols and flavonoids. The quantitative analysis of the two extracts has revealed a great richness of the margines of the souidi variety of polyphenols and flavonoids content compared to the margines of the chemlal variety. The dosage of polyphenols is 0.8 mg EAG / mlE) for Souidi and (0.5 mgEAG / mlE) for Chemlal. The in vitro evaluation of the anticoagulant activity of the margines of two varieties souidi and chemlal revealed that the margines of the souidi variety has a good anticoagulant activity vis-à-vis the endogenous pathway Time of Céphaline Kaolin (TCK).
Bioecology study of the species Paratettix meridionalis (Tetrigidae, Orthoptera) in Constantine region, eastern Algeria
Authors: Derrouiche C. , Benkenana N. , Guerfi I.
Published: May 2023

The Constantine region is located in the semi-arid bioclimatic stage. The locust and grasshoppers fauna in this region totals the presence of five families and twelve sub-families. The family Tetrigidae is represented by only one species; Paratettix meridionalis (Rambur, 1838). It is a small species, black with white spots. The pronotum is elongated and often covers the abdomen to the apex. A large number of P.meridionalis was collected near to water source. We performed morphometric analyzes. Surveys and monitoring of this grasshopper during the study period indicate that it has two generations. As part of the diet study of this species, we identified 14 plants in our study station. Results of the analysis of faeces of males and females show that it consumes plants that belong to two essential families: Asteraceae and Poaceae. The Tetrigidae family still not well-known in Algeria.
Hydrochemical study of groundwater in province of Ain Temouchent (western Algeria)
Authors: Benkhamallah Z. , Benyahia M. , Ayache A.
Published: May 2023

Groundwater resources are very scarce in the Ain Temouchent region due to the geological nature. Their operations are essential to increase the volume of water to meet the needs of the population, socio-economic development; agriculture and urbanization have accentuated the problem of their shortages. The results of the physico-chemical analyses of the various samples taken from the fifteen underground sources; show us that these waters are chlorinated, sulphated, calcic and magnesian in nature; Bicarbonate, calcic and magnesian and sodic and potassic, with high electrical conductivity and significant mineralization, evolve slightly from south to north. A predominance of chlorides, magnesium, a high content of calcium, are influenced in some places by the lithology and mineralogy of the aquifer, but also by precipitation and high evaporation in these areas, in some cases by the overexploitation of aquifers.
Biological control of Trichothecium roseum by using indigenous strains of Trichoderma harzianum isolated in Algeria
Authors: Lakhdari W. , Dehliz A. , Benlamoudi W. , Mlik R. , Mekhadmi N.H. , Hammi H. , Ouargli D.
Published: May 2023

The present study focuses on the in vitro antagonistic effect of Trichoderma harzianum against tomato cryptogrammic disease in the region of Wadi Righ; in order to introduce them into a biological control program. The fungus Trichotecium roseum was isolated from tomato plants that have fungal diseases symptoms; they were confronted directly with antagonistic strains of T. harzianum at a temperature of 26° C. The confrontation revealed that at the end of six days maximum, strains inhibited the mycelia growth of phytopathogenic species.

Beyond the 6thday, T. harzianum invades the colonies of T. roseum with 57.9, 48.29 and 32.8% obtained with the strains (ST1, ST2, ST3) respectively, revealing its highly inhibitory activity. T. harzianum strains have a real antifungal potential against T. roseum and can constitute an alternative to chemicals and used as a biological control because they have succeeded in inhibiting this phytopathogenic agent growth.
Innovation façade for an energy performance and thermal comfort of building in hot and dry climate
Authors: Benoudjafer I. , Benoudjaferf I.
Published: May 2023

This paper discusses the energy innovation of external facade for existing residential buildings. It consists to taking into account both architectural and thermal aspects for new and old construction. With the use of energy wall systems, it is possible to reduce the heating/cooling demand of energy consumption and evaluate the indicators of energy performance. In doing so, this work can contribute not only to long-term economic growth, but also help address pressing social, including on a wide range impact environmental. We use a dynamic simulation with a structural equation modelling to test the hypothese on a data base of climate of this region. The final part consists technico-economic approach, calculating the investment costs analysis, comfort and energy saving. The results demonstrate its utility in explaining, regarding high systems availables in innovation performance.
A review on the use of plant seeds in water treatment
Authors: Edogbanya P. R. O. , Obaje J. O.
Published: May 2023

Global population, which has been estimated by United Nations to hit 9.8 Billion by the middle of this century and the corresponding demand for clean, affordable and portable water, which is not readily available, especially for developing countries and even developed ones, has become a course for concern. It is estimated that 1.2 billion people lack access to clean drinking water and about 2.2 million people die annually, mostly of children under five due to consumption of unsafe water. The use of inorganic chemicals in treating water is fast becoming problematic, as it is associated with different deteriorating human health condition and pollution of water bodies. Simple to complex methods are involved in this, but the general procedure involves, collection of plant seeds, drying, grinding/extraction of active compounds and its application in water sample.
The parametric study of an absorption refrigeration system single effect with water-lithium bromide
Authors: Laoufi S. , Draoui B.
Published: May 2023

Absorption machines present an interesting alternative to conventional air conditioning systems. The Absorption machines offer an ecological aspect, in terms of the possibility of using solar energy as a heat source, and refrigerant having no ozone –depleting potential or global warning effect reported in literature.

In this paper a performance of a single effect absorption refrigeration systems of Water-Lithium Bromide are studied, some physical quantities were modelled and Plots, in particular the effect of operating temperatures on the coefficient of performance and the impact of solution exchanger efficiency and the system efficiency.
A preliminary study of insect visitors diversity in Goubellat, northern Tunisia in the presence of honeybee colonies
Authors: Ben Abdelkader F. , Ounis R. , Barbouche N. , Ammar M.
Published: May 2023

Insect visitors provide an invaluable service to the reproduction of many flowering plants. The present study concerns the distribution of insect visitors in a semi-arid environment in the presence of honey bees hives. The study took place in Goubellat a semi-arid region in north of Tunisia between Mars and May 2015. Two plots A and B distant respectively 150 m and 3 km from an apiary of 20 hives were chosen to record the insects present in the tw parcels. The number of insects captured during the study period is 1867 divided into 8 orders were sorted and divided into 4 orders mainly Coleoptera, Hymenoptera, Diptera and Lepidoptera with a percentage of 36,58; 19,5; 11,89 and 2,41% respectively. Within Hymenoptera order, three superfamilies were identified: the Apoidea, the Ichneumonidae and, the Vespoidea. The most represented family within Apoidea is the Apidea family with one species Apis mellifera followed by Megachilidea family represented also by one species, Megachile sp. The Goubellat region seems to be very poor in pollinators. Thus, the honey bee with its pollinating power can play a role in restoring degraded areas and seems to promote competitiveness among other insects.
Experimental and quantum chemical studies on molecular structure, spectroscopic analysis, NLO analysis and HOMO-LUMO of substituted N-ferrocenylmethyl-N-phenylamides
Authors: Zegheb N. , Boubekri C. , Lanez T. , Kerassaa A.
Published: May 2023

This work aims to determine structural, crystal properties and molecular spectroscopy of three N-ferrocenylmethyl-N-phenylamide using DFT method. The computed bond lengths, bond angles and dihedral angles of the titled molecules were calculated and compared with the experimental geometrical parameters, the amount of positive and negative charges using Mulliken charge and the molecular electrostatic potential map (MESP) were also investigated. The theoretical vibrational frequencies were compared with the corresponding experimental data. 1H and 13C NMR spectra were obtained using gauge including atomic orbital (GIAO) method, the calculated and experimental chemical shifts were compared. The dipole moment, linear polarizability and first order hyperpolarizability values were also computed. A study on the electronic properties, HOMO and LUMO energies, were performed by time-dependent DFT (TD-DFT) approach.
Study and construction of the Setif Tramway. An urban project approach?
Authors: Kachef S. , Labii B. , Bouzaher S.
Published: May 2023

The Setif Tramway project is a significant urban project, mobilizing, strategic and innovative, which has upset the urban dynamics of the city, by its insertion on its primary East-West axis, representing its backbone.

This paper aims the apprehension of this project as a city project, through its development process, to understand its approach, and to identify a new posture which speaks of a management system, where the process of “Pluralization” responds to strategic orientations which aim at complementarity between the strategy of political actors and the needs of citizen actors. The aim is to speak about the design and development phase of the Setif tram project. Allowing researchers to develop a roadmap for their projects and helping decision-makers to pilot and manage such operations.
Vegetation as a tool for thermal regulation of urban microclimate in arid regions
Authors: Badache H. , Alkama Dj.
Published: May 2023

The city of Biskra is known by its hot and arid climate; its outdoor spaces know extremely high temperatures during the summer period, which affect thermal comfort, well-being, user’s satisfaction in public spaces, such as the "Revolution’s plaza" which known by considerable attendance and a particular design. This study, focuses on the role of the urban vegetation on the thermal regulation in the open space. The main purpose is to study the effect of vegetation on the urban microclimate of this space “Revolution plaza”, through a site investigation, in order to measure the local climate and compare the results with weather’s station data. After that, an improvement case is suggested by simulation by Envi-Met 4 software. The results show the significant effect of the trees and natural surfaces in decreasing the heat transfer and temperatures degrees; which provides a favorable microclimate in this open space.
Application of stochastic methods (genetic algorithm-tabu search) to identify the parameters of Mohr Coulomb model
Authors: Moussaoui M.
Published: May 2023

The problem of the choice of the parameters of soil is a difficult task, she requires many experiences. To answer this question, methods of identification of parameters, based on the principle of inverse analysis are developed who consist in adjusting a numerical model on observed experimental data. The objective of this work is to apply the principle of inverse analysis by using stochastic optimization methods (genetic algorithm and the genetic algorithm hybrid with tabu search) to identify the parameters (G, φ) of the constitutive soil model Mohr-Coulomb, from a real case of landslide of the Ciloc city of Constantine in Algeria. The Analysis of the results obtained showed that the best sets of parameters (G, φ) which minimize the deviation between the numerical model and the experiment are found by the genetic algorithm method.