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180 Results Found

  • Article
  • Open Access
20 Citations
4,290 Views
9 Pages

16 June 2017

In this note, we discuss when the concave integral coincides with the pan- integral with respect to the standard arithmetic operations + and ·. The subadditivity of the underlying monotone measure is one sufficient condition for this equality. We sho...

  • Article
  • Open Access
3 Citations
2,049 Views
10 Pages

24 September 2021

We investigate the existence and uniqueness of positive solutions to an integral equation involving convex or concave nonlinearities. A numerical algorithm based on Picard iterations is provided to obtain an approximation of the unique solution. The...

(This article belongs to the Special Issue Nonlinear Equations: Theory, Methods, and Applications II)
  • Article
  • Open Access
2 Citations
1,645 Views
27 Pages

30 May 2025

Ultra-high-pressure hydrogen solenoid valves face a fundamental design challenge of operating across a wide pressure range from 2 MPa to 87.5 MPa. To address the conflicting requirements of effective sealing at low pressures and structural integrity...

  • Article
  • Open Access
4 Citations
2,057 Views
14 Pages

6 July 2023

The decomposition integrals of set-valued functions with regards to fuzzy measures are introduced in a natural way. These integrals are an extension of the decomposition integral for real-valued functions and include several types of set-valued integ...

  • Article
  • Open Access
13 Citations
3,019 Views
17 Pages

In the paper, the authors introduce two notions, the normalized remainders, or say, the normalized tails, of the Maclaurin power series expansions of the sine and cosine functions, derive two integral representations of the normalized tails, prove th...

(This article belongs to the Section General Mathematics, Analysis)
  • Article
  • Open Access
2,436 Views
17 Pages

29 October 2024

Investigation of the generalized trigonometric and hyperbolic functions containing two parameters has been a very active research area over the last decade. We believe, however, that their monotonicity and convexity properties with respect to paramet...

(This article belongs to the Special Issue Integral Transforms and Special Functions in Applied Mathematics)
  • Article
  • Open Access
1,600 Views
13 Pages

9 November 2023

We introduce a method based on Lipschitz pointwise transformations to define a distance on a Banach function space from its norm. We show how some specific lattice geometric properties (p-convexity, p-concavity, p-regularity) or, equivalently, some t...

(This article belongs to the Special Issue Ordered Topological Vector Spaces, Operators Acting on Them and Related Applications)
  • Article
  • Open Access
5 Citations
2,907 Views
15 Pages

Design and Fabrication of an Integrated Hollow Concave Cilium MEMS Cardiac Sound Sensor

  • Bo Wang,
  • Pengcheng Shi,
  • Yuhua Yang,
  • Jiangong Cui and ,
  • Guojun Zhang,
  • Renxin Wang,
  • Wendong Zhang,
  • Changde He,
  • Yirui Li and
  • Shuotong Wang
  • + 5 authors+ 0 author

8 December 2022

In light of a need for low-frequency, high sensitivity and broadband cardiac murmur signal detection, the present work puts forward an integrated MEMS-based heart sound sensor with a hollow concave ciliary micro-structure. The advantages of a hollow...

(This article belongs to the Special Issue Advances in MEMS Theory and Applications, 2nd Edition)
  • Article
  • Open Access
4 Citations
4,023 Views
28 Pages

7 May 2024

Urban floods caused by extreme rainstorm events have increased in recent decades, particularly in concave-down bridge zones. To simulate urban flooding processes accurately, an integrated urban flood model (IUFM) was constructed by coupling a distrib...

(This article belongs to the Section Environmental Remote Sensing)
  • Article
  • Open Access
16 Citations
3,329 Views
10 Pages

The Anatomy of Glenoid Concavity—Bony and Osteochondral Assessment of a Stability-Related Parameter

  • Jens Wermers,
  • Michael J. Raschke,
  • Marcel Wilken,
  • Arne Riegel and
  • J. Christoph Katthagen

22 September 2021

Glenoid concavity is a crucial factor for glenohumeral stability. However, the distribution of this stability-related parameter has not been focused on in anatomical studies. In this retrospective study, computed tomography (CT) data and tactile meas...

(This article belongs to the Special Issue Recent Developments in the Clinical Treatment of Shoulder Joint Instability)
  • Article
  • Open Access
9 Citations
4,461 Views
23 Pages

Some Certain Fuzzy Aumann Integral Inequalities for Generalized Convexity via Fuzzy Number Valued Mappings

  • Muhammad Bilal Khan,
  • Hakeem A. Othman,
  • Michael Gr. Voskoglou,
  • Lazim Abdullah and
  • Alia M. Alzubaidi

19 January 2023

The topic of convex and nonconvex mapping has many applications in engineering and applied mathematics. The Aumann and fuzzy Aumann integrals are the most significant interval and fuzzy operators that allow the classical theory of integrals to be gen...

(This article belongs to the Special Issue Fuzzy Sets, Fuzzy Logic and Their Applications 2021)
  • Review
  • Open Access
24 Citations
6,897 Views
32 Pages

Fabrication of Concave Microwells and Their Applications in Micro-Tissue Engineering: A Review

  • Weijin Guo,
  • Zejingqiu Chen,
  • Zitao Feng,
  • Haonan Li and ,
  • Muyang Zhang,
  • Huiru Zhang and
  • Xin Cui
  • + 2 authors+ 0 author

19 September 2022

At present, there is an increasing need to mimic the in vivo micro-environment in the culture of cells and tissues in micro-tissue engineering. Concave microwells are becoming increasingly popular since they can provide a micro-environment that is cl...

(This article belongs to the Special Issue 3D Bioprinting and Biofabrication for the Future of Tissue Engineering)
  • Article
  • Open Access
25 Citations
15,785 Views
21 Pages

13 February 2023

We extend techniques and learnings about the stochastic properties of nonlinear responses from finance to medicine, particularly oncology, where it can inform dosing and intervention. We define antifragility. We propose uses of risk analysis for medi...

(This article belongs to the Section Complexity)
  • Article
  • Open Access
12 Citations
4,533 Views
15 Pages

Design and Realization of MEMS Heart Sound Sensor with Concave, Racket-Shaped Cilium

  • Yuhua Yang,
  • Bo Wang,
  • Jiangong Cui,
  • Guojun Zhang and ,
  • Renxin Wang,
  • Wendong Zhang,
  • Changde He,
  • Yirui Li,
  • Pengcheng Shi and
  • Shuotong Wang
  • + 5 authors+ 0 author

18 July 2022

The biomedical acoustic signal plays an important role in clinical non-invasive diagnosis. In view of the deficiencies in early diagnosis of cardiovascular diseases, acoustic properties of S1 and S2 heart sounds are utilized. In this paper, we propos...

(This article belongs to the Section Nano- and Micro-Technologies in Biosensors)
  • Article
  • Open Access
1,045 Views
15 Pages

27 July 2025

Shoulder-assisted heating friction plug welding (SAH-FPW) experiments were conducted to repair keyhole-like volumetric defects in 6082-T6 aluminum alloy, employing a novel concave backing hole technique on a flat backing plate. This approach yielded...

(This article belongs to the Special Issue Advances in Welding and Joining of Alloys and Steel)
  • Article
  • Open Access
4 Citations
3,063 Views
25 Pages

To achieve carbon neutrality, a reduction in car body weight is essential. Multi-material structures that use lightweight materials such as carbon fiber-reinforced polymers (CFRP) and aluminum (Al) alloy are used to replace parts of steel components....

(This article belongs to the Special Issue Effect of Processing Techniques on the Characterization of Alloys Composites and Hybrids)
  • Article
  • Open Access
10 Citations
3,582 Views
16 Pages

Automatic Control System for Maize Threshing Concave Clearance Based on Entrainment Loss Monitoring

  • Yang Yu,
  • Yi Cheng,
  • Chenlong Fan,
  • Liyuan Chen and ,
  • Qinhao Wu,
  • Mengmeng Qiao and
  • Xin Zhou
  • + 2 authors+ 0 author

30 December 2024

Complex harvesting environments and varying crop conditions often lead to threshing cylinder blockage and increased entrainment loss in maize grain harvesters. To address these issues, an electric-driven automatic control system for maize threshing c...

(This article belongs to the Special Issue Intelligent Monitoring and Fault Diagnosis of Complex Industrial Processes or Equipment)
  • Article
  • Open Access
1 Citations
2,348 Views
6 Pages

12 July 2021

Our starting point is an integral inequality that involves convex, concave and monotonically increasing functions. We provide some interpretations of the inequality, in terms of both probability and terms of linear functionals, from which we further...

(This article belongs to the Special Issue Mathematical Inequalities with Applications)
  • Article
  • Open Access
32 Citations
2,831 Views
11 Pages

Better Approaches for n-Times Differentiable Convex Functions

  • Praveen Agarwal,
  • Mahir Kadakal,
  • İmdat İşcan and
  • Yu-Ming Chu

10 June 2020

In this work, by using an integral identity together with the Hölder–İşcan inequality we establish several new inequalities for n-times differentiable convex and concave mappings. Furthermore, various applications for some special means as...

(This article belongs to the Special Issue Mathematical Analysis and Analytic Number Theory 2020)
  • Article
  • Open Access
1 Citations
2,075 Views
18 Pages

In this paper, we use the fixed-point index to establish positive solutions for a system of Riemann–Liouville type fractional-order integral boundary value problems. Some appropriate concave and convex functions are used to characterize couplin...

(This article belongs to the Special Issue Fractional Differential Equations in Anomalous Diffusion)
  • Article
  • Open Access
7 Citations
2,414 Views
11 Pages

Superlattice Structure for High Performance AlGaN Deep Ultraviolet LEDs

  • Mano Bala Sankar Muthu,
  • Ravi Teja Velpula,
  • Barsha Jain and
  • Hieu Pham Trung Nguyen

This study presents a novel approach to mitigate electron overflow in deep ultraviolet (UV) AlGaN light-emitting diodes (LEDs) by integrating engineered quantum barriers (QBs) with a concave shape and an optimized AlGaN superlattice (SL) electron blo...

(This article belongs to the Section Optoelectronics and Optical Materials)
  • Article
  • Open Access
3 Citations
2,522 Views
10 Pages

31 July 2020

In this article we give a variant of the Hermite–Hadamard integral inequality for twice differentiable functions. It represents an improvement of this inequality in the case of convex/concave functions. Sharp two-sided inequalities for Simpson&...

(This article belongs to the Special Issue Applications of Inequalities and Functional Analysis)
  • Article
  • Open Access
18 Citations
2,173 Views
13 Pages

In this study, new midpoint-type inequalities are given through recently generalized Riemann–Liouville fractional integrals. Foremost, we present an identity for a class of differentiable functions including the proposed fractional integrals. T...

(This article belongs to the Special Issue Fractional Integral Inequalities and Applications)
  • Review
  • Open Access
49 Citations
11,932 Views
44 Pages

14 October 2024

The unique diffractive properties of gratings have made them essential in a wide range of applications, including spectral analysis, precision measurement, optical data storage, laser technology, and biomedical imaging. With advancements in micro- an...

(This article belongs to the Special Issue Feature Papers in Optical Sensors 2024)
  • Article
  • Open Access
11 Citations
2,745 Views
14 Pages

Experimental Studies on Fabricating Lenslet Array with Slow Tool Servo

  • Wenjun Kang,
  • Masafumi Seigo,
  • Huapan Xiao,
  • Daodang Wang and
  • Rongguang Liang

21 September 2022

On the demand of low-cost, lightweight, miniaturized, and integrated optical systems, precision lenslet arrays are widely used. Diamond turning is often used to fabricate lenslet arrays directly or molds that are used to mold lenslet arrays. In this...

(This article belongs to the Special Issue Ultra-Precision Manufacturing Technology)
  • Technical Note
  • Open Access
7 Citations
10,709 Views
10 Pages

25 January 2024

Knowledge of the geometric quantities of the erythrocyte is useful in several physiological studies, both for zoologists and veterinarians. While the diameter and volume (MCV) are easily obtained from observations of blood smears and complete blood c...

(This article belongs to the Section Biomedical Sciences and Physiology)
  • Article
  • Open Access
732 Views
25 Pages

To address the issue of significantly reduced coupling coefficient and limited transmission efficiency in traditional flat solenoid magnetic couplers within wireless power transfer (WPT) systems under horizontal lateral offset conditions, this paper...

(This article belongs to the Section Automated and Connected Vehicles)
  • Article
  • Open Access
5 Citations
3,358 Views
16 Pages

Curved Fabry-Pérot Ultrasound Detectors: Optical and Mechanical Analysis

  • Barbara Rossi,
  • Maria Alessandra Cutolo,
  • Martino Giaquinto,
  • Andrea Cusano and
  • Giovanni Breglio

8 February 2025

Optical fiber-based acoustic detectors for ultrasound imaging in medical field feature plano-concave Fabry–Perot cavities integrated on fiber tips, realized via dip-coating. This technique imposes constraints on sensor geometry, potentially lim...

(This article belongs to the Special Issue Feature Papers in Optical Sensors 2025)
  • Article
  • Open Access
1 Citations
1,188 Views
15 Pages

6 November 2025

This study employs the UCMW (Universal crown mill with work roll shifting) cold rolling mill as the research object, focusing on the critical process parameter of single-taper profiles for both the work roll and intermediate roll. By establishing an...

  • Article
  • Open Access
5 Citations
2,987 Views
10 Pages

Some Inequalities of Extended Hypergeometric Functions

  • Shilpi Jain,
  • Rahul Goyal,
  • Praveen Agarwal and
  • Juan L. G. Guirao

25 October 2021

Hypergeometric functions and their inequalities have found frequent applications in various fields of mathematical sciences. Motivated by the above, we set up certain inequalities including extended type Gauss hypergeometric function and confluent hy...

(This article belongs to the Special Issue Nonlinear Equations: Theory, Methods, and Applications II)
  • Article
  • Open Access
1,254 Views
21 Pages

A Prototype of Simultaneous Husking and Separating Machine for Dry Betel Nut

  • Alongkorn Pirayawaraporn,
  • Nachaya Chindakham,
  • Pokkrong Vongkoon and
  • Chaowanan Jamroen

5 February 2026

After harvesting and drying, areca nut (betel nut) processing requires shell cracking and separation of the kernel from the shell. Conventional processing often relies on manual sorting or additional separation machines after husking. To address this...

(This article belongs to the Section Agricultural Science and Technology)
  • Feature Paper
  • Article
  • Open Access
2 Citations
1,274 Views
15 Pages

16 March 2025

Spatial discrete data modeling plays a crucial role in geoscientific data analysis, with accuracy and efficiency being significant factors to consider in the modeling of massive discrete datasets. In this paper, an efficient and regularized modeling...

  • Article
  • Open Access
1 Citations
829 Views
24 Pages

Emergency facility location and layout are critical to the efficiency of emergency rescue and resource allocation. However, practical emergency scenarios are plagued by two key challenges: the risk of facility failure due to various uncertain factors...

(This article belongs to the Special Issue Applied Optimization in Automatic Control and Systems Engineering)
  • Article
  • Open Access
4 Citations
2,656 Views
11 Pages

Solar Radiation on a Parabolic Concave Surface

  • Avi Aronescu and
  • Joseph Appelbaum

16 April 2021

Curved structures are used in buildings and may be integrated with photovoltaic modules. Self-shading occurs on non-flat (curved) surface collectors resulting in a non-uniform distribution of the direct beam and the diffuse incident solar radiation a...

  • Article
  • Open Access
2,599 Views
16 Pages

General Opial Type Inequality and New Green Functions

  • Ana Gudelj,
  • Kristina Krulić Himmelreich and
  • Josip Pečarić

26 May 2022

In this paper we provide many new results involving Opial type inequalities. We consider two functions—one is convex and the other is concave—and prove a new general inequality on a measure space (Ω,Σ,μ). We give an new res...

(This article belongs to the Special Issue Special Functions and Polynomials: Theory, Practice, Applications, and Modeling)
  • Article
  • Open Access
1 Citations
2,006 Views
10 Pages

3 June 2023

Stabilization by a parametric distributed control function plays a very important role in aeronautics, aerospace and physics. Choosing the right parameters is necessary for handling the distributed control. In the current paper, we introduce stabiliz...

  • Article
  • Open Access
1 Citations
2,022 Views
13 Pages

30 January 2023

We introduce the Levinson functional on time scales using integral inequality of Levinson’s type in the terms of Δ-integral for convex (concave) functions on time scale sets and investigate its properties such as superadditivity and monot...

(This article belongs to the Special Issue Nonlinear Dynamical Systems with Applications)
  • Article
  • Open Access
9 Citations
3,353 Views
16 Pages

It is of great significance to understand the dynamics and risk level of pedestrians at the multi-exit inspection points, since they are the bottlenecks of pedestrian flow leaving public places, such as subway and railway stations. Microscopic simula...

(This article belongs to the Special Issue Safety and Analysis)
  • Article
  • Open Access
15 Citations
5,749 Views
25 Pages

Design and Mechanical Properties of Negative Poisson’s Ratio Structure-Based Topology Optimization

  • Dongchen Qin,
  • Mengchun Li,
  • Tingting Wang,
  • Jiangyi Chen and
  • Hongxia Wu

29 June 2023

Scholars have shown significant interest in the design and investigation of mechanical metamaterials with a negative Poisson’s ratio as a result of the rapid progress in additive manufacturing technology, giving rise to the concept of metamater...

(This article belongs to the Section Mechanical Engineering)
  • Article
  • Open Access
9 Citations
2,627 Views
19 Pages

Hermite-Hadamard Fractional Integral Inequalities via Abel-Gontscharoff Green’s Function

  • Yixia Li,
  • Muhammad Samraiz,
  • Ayesha Gul,
  • Miguel Vivas-Cortez and
  • Gauhar Rahman

The Hermite-Hadamard inequalities for κ-Riemann-Liouville fractional integrals (R-LFI) are presented in this study using a relatively novel approach based on Abel-Gontscharoff Green’s function. In this new technique, we first established...

(This article belongs to the Special Issue Fractional Calculus Operators and the Mittag-Leffler Function)
  • Communication
  • Open Access
732 Views
8 Pages

20 November 2025

We present a parallel DNA molecular analysis platform based on an array of plano-concave Fabry–Pérot (PC-FP) microcavity lasers that enables the simultaneous, sequence-specific detection of multiple DNA targets. Each PC-FP cavity is func...

  • Proceeding Paper
  • Open Access
1 Citations
9,511 Views
8 Pages

30 November 2023

An innovative and simple design for a weaving loom was proposed to simplify the pattern design and the decoding process of weaving. Using the structural analysis of the existing looms and based on the concepts of weaving, a creative open-type rigid h...

(This article belongs to the Proceedings of 2023 IEEE 5th Eurasia Conference on Biomedical Engineering, Healthcare and Sustainability)
  • Article
  • Open Access
5 Citations
1,377 Views
19 Pages

An Extension of Left Radau Type Inequalities to Fractal Spaces and Applications

  • Bandar Bin-Mohsin,
  • Abdelghani Lakhdari,
  • Nour El Islem Karabadji,
  • Muhammad Uzair Awan and ,
  • Abdellatif Ben Makhlouf,
  • Badreddine Meftah and
  • Silvestru Sever Dragomir
  • + 2 authors+ 0 author

23 September 2024

In this study, we introduce a novel local fractional integral identity related to the Gaussian two-point left Radau rule. Based on this identity, we establish some new fractal inequalities for functions whose first-order local fractional derivatives...

(This article belongs to the Special Issue Recent Advances in Fractional Differential Equations and Inequalities)
  • Article
  • Open Access
2 Citations
2,690 Views
17 Pages

Riverbank Following Planner (RBFP) for USVs Based on Point Cloud Data

  • Yijie Chu,
  • Ziniu Wu,
  • Xiaohui Zhu,
  • Yong Yue and ,
  • Eng Gee Lim,
  • Paolo Paoletti and
  • Jieming Ma
  • + 2 authors+ 0 author

15 October 2023

Autonomous path planning along riverbanks is crucial for unmanned surface vehicles (USVs) to execute specific tasks such as levee safety detection and underwater pipe inspections, which are vital for riverbank safety and water environment protection....

  • Article
  • Open Access
348 Views
24 Pages

8 July 2026

In this paper, we establish a fundamental lemma based on symmetric quantum monotonicity within the framework of symmetric quantum calculus. Using this lemma, we derive the symmetric quantum Favard inequality and its Berwald-type extensions, together...

(This article belongs to the Section C: Physics)
  • Article
  • Open Access
2 Citations
2,328 Views
20 Pages

Innovative Interpolating Polynomial Approach to Fractional Integral Inequalities and Real-World Implementations

  • Muhammad Samraiz,
  • Saima Naheed,
  • Ayesha Gul,
  • Gauhar Rahman and
  • Miguel Vivas-Cortez

26 September 2023

Our paper explores Hermite–Hadamard inequalities through the application of Abel–Gontscharoff Green’s function methodology, which involves interpolating polynomials and Riemann-type generalized fractional integrals. While establishi...

(This article belongs to the Special Issue Current Research on Mathematical Inequalities II)
  • Article
  • Open Access
1,307 Views
14 Pages

7 September 2025

This study provides new equivalent descriptions of the Bounded Lower Oscillation (BLO) space through Luxemburg-type Lφ integrability conditions, where φ is a nonnegative function with either convexity or concavity. The framework accommodates...

  • Article
  • Open Access
20 Citations
3,763 Views
19 Pages

Investigating and Modelling an Engineered Millifluidic In Vitro Oocyte Maturation System Reproducing the Physiological Ovary Environment in the Sheep Model

  • Antonella Mastrorocco,
  • Ludovica Cacopardo,
  • Letizia Temerario,
  • Nicola Antonio Martino and ,
  • Federico Tridente,
  • Annalisa Rizzo,
  • Giovanni Michele Lacalandra,
  • Domenico Robbe,
  • Augusto Carluccio and
  • Maria Elena Dell’Aquila
  • + 5 authors+ 0 author

15 November 2022

In conventional assisted reproductive technologies (ARTs), oocytes are in vitro cultured in static conditions. Instead, dynamic systems could better mimic the physiological in vivo environment. In this study, a millifluidic in vitro oocyte maturation...

(This article belongs to the Topic Bioreactors for Advanced Cell Culture, (Nano)toxicity, Regenerative Medicine and Organ Bioengineering)
  • Article
  • Open Access
773 Views
15 Pages

Under-Ceiling Temperature Distribution in a Small-Radius UTLT: Effect of Transverse Fire Location

  • Xin Xu,
  • Guoqing Zhu,
  • Min Peng,
  • Chao Zhu and ,
  • Zhen Hu and
  • Yumeng Wang
  • + 1 author+ 0 author

15 August 2026

High-temperature smoke remains a primary threat in tunnel fire safety. The curved walls of small-radius Urban Traffic Link Tunnels (UTLTs) significantly alter smoke flow patterns and temperature distribution. Furthermore, no quantitative model exists...

(This article belongs to the Special Issue Experimental and Numerical Investigations into Fire Dynamics in Enclosed and Open Spaces)
  • Article
  • Open Access
9 Citations
2,200 Views
14 Pages

Ozaki-Type Bi-Close-to-Convex and Bi-Concave Functions Involving a Modified Caputo’s Fractional Operator Linked with a Three-Leaf Function

  • Kaliappan Vijaya,
  • Gangadharan Murugusundaramoorthy,
  • Daniel Breaz,
  • Georgia Irina Oros and
  • Sheza M. El-Deeb

The focus of the present work is on the establishment and investigation of the coefficient estimates of two new subclasses of bi-close-to-convex functions and bi-concave functions; these are of an Ozaki type and involve a modified Caputo’s frac...

(This article belongs to the Special Issue Fractional Calculus, Quantum Calculus and Special Functions in Complex Analysis)

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