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4,852 Results Found

  • Article
  • Open Access
27 Citations
5,839 Views
20 Pages

The Use of Chlorophyll Meters to Assess Crop N Status and Derivation of Sufficiency Values for Sweet Pepper

  • Romina de Souza,
  • M. Teresa Peña-Fleitas,
  • Rodney B. Thompson,
  • Marisa Gallardo,
  • Rafael Grasso and
  • Francisco M. Padilla

4 July 2019

Chlorophyll meters are promising tools for improving the nitrogen (N) management of vegetable crops. To facilitate on-farm use of these meters, sufficiency values that identify deficient and sufficient crop N status are required. This work evaluated...

(This article belongs to the Special Issue Proximal Sensing for Nitrogen Management)
  • Article
  • Open Access
12 Citations
16,291 Views
29 Pages

4 May 2012

Many local governments in Germany aim to reach Renewable Energy Self-Sufficiency (RESS) in their municipalities. In this context, ambitious time horizons for reaching this goal make it necessary to address the question of how less absolute energy can...

(This article belongs to the Special Issue Changing the Energy System to Renewable Energy Self-Sufficiency (RESS) - Selected Papers from the RESS Conference, 15-16 September 2011, Freiburg, Germany)
  • Article
  • Open Access
13 Citations
3,434 Views
21 Pages

Soil Monitoring Methods to Assess Immediately Available Soil N for Fertigated Sweet Pepper

  • Alejandra Rodríguez,
  • M. Teresa Peña-Fleitas,
  • Francisco M. Padilla,
  • Marisa Gallardo and
  • Rodney B. Thompson

19 December 2020

Excessive N application occurs in greenhouse vegetable production. Monitoring methods of immediately available soil N are required. [NO3] in soil solution, sampled with ceramic cup samplers, and [NO3] in the 1:2 soil to water (v/v) extr...

(This article belongs to the Special Issue Management of Crops Fertigation)
  • Article
  • Open Access
26 Citations
17,017 Views
25 Pages

Digital Marketing Strategies and Profitability in the Agri-Food Industry: Resource Efficiency and Value Chains

  • Nikos Kanellos,
  • Panagiotis Karountzos,
  • Nikolaos T. Giannakopoulos,
  • Marina C. Terzi and
  • Damianos P. Sakas

10 July 2024

Agriculture is essential to any country’s economy. Agriculture is crucial not only for feeding a country’s population but also for its impact on other businesses. The paradox of agri-food companies generating substantial profits despite s...

(This article belongs to the Collection Digital Economy and Sustainable Development)
  • Article
  • Open Access
1 Citations
3,137 Views
18 Pages

Finite element (FE) modeling is a commonly used method to investigate the influence of medical devices, such as implants and screws, on the biomechanical behavior of the spine. Another simulation method is multibody simulation (MBS), where the model...

(This article belongs to the Topic Trends and Prospects in Biomechanics)
  • Feature Paper
  • Article
  • Open Access
2 Citations
1,804 Views
20 Pages

27 March 2024

Sufficient conditions are obtained for a signed maximum principle for boundary value problems for Riemann–Liouville fractional differential equations with analogues of Neumann or periodic boundary conditions in neighborhoods of simple eigenvalu...

(This article belongs to the Special Issue Advances in Differential and Difference Equations and Their Applications)
  • Article
  • Open Access
52 Citations
15,242 Views
20 Pages

The Problematic Role of Materialistic Values in the Pursuit of Sustainable Well-Being

  • Amy Isham,
  • Caroline Verfuerth,
  • Alison Armstrong,
  • Patrick Elf,
  • Birgitta Gatersleben and
  • Tim Jackson

Strong materialistic values help to maintain consumer capitalism, but they can have negative consequences for individual well-being, for social equity and for environmental sustainability. In this paper, we add to the existing literature on the adver...

  • Article
  • Open Access
12 Citations
2,621 Views
19 Pages

Flexibility from Combined Heat and Power: A Techno-Economic Study for Fully Renewable Åland Islands

  • Tomi Thomasson,
  • Kirsikka Kiviranta,
  • Antton Tapani and
  • Matti Tähtinen

8 October 2021

As energy systems globally are transitioning into renewable energy, simultaneous targets of high self-sufficiency have led to complex system design proposals. While conventional technology solutions would reduce the complexity in theory, limitations...

  • Article
  • Open Access
1 Citations
2,023 Views
35 Pages

3 July 2024

Several types of linear and nonlinear singularly perturbed time-delay differential systems are considered. Asymptotic stability of the linear systems and asymptotic stability of the trivial solution of the nonlinear systems, valid for any sufficientl...

(This article belongs to the Special Issue Nonlinear Analysis and Its Applications in Symmetry II)
  • Article
  • Open Access
12 Citations
2,518 Views
18 Pages

18 December 2022

A boundary-value problem for a couple of scalar nonlinear differential equations with a delay and several generalized proportional Caputo fractional derivatives is studied. Ulam-type stability of the given problem is investigated. Sufficient conditio...

(This article belongs to the Special Issue Impulsive, Delay and Fractional Order Systems)
  • Review
  • Open Access
65 Citations
8,724 Views
14 Pages

13 May 2020

Efforts to achieve an energy transition often neglect to account for the levelling of benefits realizable with higher levels of energy use, despite knowledge of a saturation effect and recognition of increasing harms of use. This research examines en...

(This article belongs to the Special Issue Solutions to Climate Emergency)
  • Article
  • Open Access
5 Citations
3,437 Views
19 Pages

15 July 2019

Two types of singularly-perturbed nonlinear time delay controlled systems are considered. For these systems, sufficient conditions of the functional null controllability are derived. These conditions, being independent of the parameter of singular pe...

  • Article
  • Open Access
31 Citations
6,133 Views
14 Pages

Background: The World Health Organization (WHO) proposed two-dose measles vaccination coverage of at least 95% of the population and percentages of measles immunity in the population of 85%−95% in order to achieve measles elimination in Europe....

(This article belongs to the Special Issue Strategies to Increase Vaccination Coverage and Vaccine Confidence)
  • Article
  • Open Access
53 Citations
3,910 Views
15 Pages

14 August 2021

A plethora of sufficient convergence criteria has been provided for single-step iterative methods to solve Banach space valued operator equations. However, an interesting question remains unanswered: is it possible to provide unified convergence crit...

(This article belongs to the Special Issue Application of Iterative Methods for Solving Nonlinear Equations)
  • Article
  • Open Access
357 Views
17 Pages

15 June 2026

We study convergence in multi-agent reinforcement learning (MARL) through the lens of sufficient conditions, using a single-point-of-failure analysis applied to multi-agent policy iteration integrated with linear programming (MAPI-LP), where results...

(This article belongs to the Section E1: Mathematics and Computer Science)
  • Article
  • Open Access
2,444 Views
18 Pages

2 April 2023

We consider the dynamics of a logistic equation with delays and modified nonlinearity, the role of which is to bound the values of solutions from above. First, the local dynamics in the neighborhood of the equilibrium state are studied using standard...

(This article belongs to the Special Issue Advances in Delay Differential Equations)
  • Article
  • Open Access
4 Citations
1,558 Views
17 Pages

Spatiotemporal Patterns in Production and Consumption of Major Foods in Qinghai, China

  • Yexuan Liu,
  • Lin Zhen,
  • Quanqin Shao,
  • Junzhi Ye and
  • Siliang Xie

21 February 2025

Food security is an important foundation of national security. Since China entered a new era in 2012, the supply of agricultural and animal husbandry products in Qinghai has continuously enhanced. However, the implementation of ecological policies su...

(This article belongs to the Section Food Security and Sustainability)
  • Article
  • Open Access
1 Citations
1,797 Views
14 Pages

Bi-Objective Optimization for Interval Max-Plus Linear Systems

  • Cailu Wang,
  • Jiye Zhang,
  • Pengcheng Chen and
  • Haichao Zhao

23 February 2024

This paper investigates the interval-valued-multi-objective-optimization problem, whose objective function is a vector-valued max-plus interval function and the constraint function is a real-affine function. The strong and weak solvabilities of the i...

(This article belongs to the Special Issue Advances in Control Systems and Automatic Control)
  • Article
  • Open Access
6 Citations
3,554 Views
23 Pages

Competitiveness and Cereal Self-Sufficiency in Western Balkan Countries

  • Mina Kovljenić,
  • Bojan Matkovski and
  • Danilo Đokić

Crises like the COVID-19 pandemic, the Russian-Ukrainian war, and challenges associated with sustainable development have emphasized the need for local food to increase the food system’s resilience. Therefore, this research analyzes the food se...

(This article belongs to the Section Agricultural Economics, Policies and Rural Management)
  • Article
  • Open Access
1 Citations
4,062 Views
18 Pages

13 September 2020

In this paper, we study the information lost when a real-valued statistic is used to reduce or summarize sample data from a discrete random variable with a one-dimensional parameter. We compare the probability that a random sample gives a particular...

  • Feature Paper
  • Article
  • Open Access
18 Citations
5,023 Views
14 Pages

Prediction of Wastewater Quality at a Wastewater Treatment Plant Inlet Using a System Based on Machine Learning Methods

  • Barbara Wodecka,
  • Jakub Drewnowski,
  • Anita Białek,
  • Ewa Łazuka and
  • Joanna Szulżyk-Cieplak

1 January 2022

One of the important factors determining the biochemical processes in bioreactors is the quality of the wastewater inflow to the wastewater treatment plant (WWTP). Information on the quality of wastewater, sufficiently in advance, makes it possible t...

(This article belongs to the Section Environmental and Green Processes)
  • Feature Paper
  • Article
  • Open Access
1 Citations
3,349 Views
17 Pages

20 January 2025

In this paper, we investigate the global behavior of the weak solutions to the initial boundary value problem for the nonlinear wave equation in a bounded domain. The nonlinearity includes a logarithmic term and several power-type terms with nonnegat...

  • Article
  • Open Access
27 Citations
6,152 Views
16 Pages

23 March 2023

Finite element analysis of complex bodies is frequently used in design to determine the size of deformations. Successive iterations, with progressive refinement of mesh densities, are most often required to obtain a sufficiently accurate convergent n...

(This article belongs to the Special Issue Manufacturing and Mechanics of Materials, Volume II)
  • Letter
  • Open Access
3 Citations
2,324 Views
9 Pages

22 October 2020

Four variants of elastic optical data center network (DCN) architectures based on optical circuit switching were proposed in an earlier study. The necessary and sufficient values of frequency slot units (FSUs) per fiber required for these four DCNs i...

(This article belongs to the Collection New Trends in Optical Networks)
  • Article
  • Open Access
1 Citations
5,832 Views
24 Pages

Energy Optimisation Models for Self-Sufficiency of a Typical Turkish Residential Electricity Customer of the Future

  • Doğukan Aycı,
  • Ferhat Öğüt,
  • Ulaş Özen,
  • Bora Batuhan İşgör and
  • Sinan Küfeoğlu

27 September 2021

This paper utilises a two-stage demand response-enabled energy management algorithm for a typical Turkish self-sufficient living space. The proposed energy management model provides an additional gain in line with the goal of self-sufficiency by sche...

(This article belongs to the Section C: Energy Economics and Policy)
  • Article
  • Open Access
48 Citations
12,553 Views
23 Pages

25 December 2015

In the context of the larger sustainability discourse, “sufficiency” is beginning to emerge as a new value throughout Western societies, and the question asked in this article is: Can we observe and conceptually identify opportunities to link success...

  • Article
  • Open Access
5 Citations
6,686 Views
14 Pages

Vitamin D Status in a Rural Italian Population

  • Ornella Morsilli,
  • Raffaella Guerriero,
  • Luigi Palmieri,
  • Cinzia Lo Noce,
  • Tanja Zeller,
  • Stefan Blankenberg,
  • Anna Di Lonardo,
  • Serena Vannucchi,
  • Marco Gabbianelli and
  • Chiara Donfrancesco

27 December 2021

Vitamin D is known as an antirachitic factor, although it also plays a critical role in several nonskeletal diseases. In our study, we evaluated vitamin D status and sex, age and seasonal association in a general population cohort living in central I...

  • Article
  • Open Access
262 Views
26 Pages

16 July 2026

A variable selection method is put forward for multivariate linear regression models which obey normality. This method hinges on minimizing a generalized Cp (GCp) criterion which is defined by adding a positive constant value (the product of α...

(This article belongs to the Special Issue New Challenges in Statistical Analysis and Multivariate Data Analysis)
  • Article
  • Open Access
2 Citations
2,258 Views
16 Pages

21 July 2023

The goal of this paper is to present the necessary and sufficient conditions that every extremizer of a given class of functionals, defined on the set C1[a,b], must satisfy. The Lagrange function depends on a generalized fractional derivative, on a g...

(This article belongs to the Special Issue Recent Research on Fractional Calculus: Theory and Applications)
  • Article
  • Open Access
3 Citations
3,158 Views
10 Pages

Bioelectrical Impedance in Premature Newborns and Its Relationship with Diet Therapy in a Neonatal Intensive Care Unit

  • Catiuscie Cabreira da Silva Tortorella,
  • Bárbara Mendes Paz Chao,
  • Estela Iraci Rabito,
  • Mônica Nunes Lima and
  • Ana Lúcia Figueiredo Sarquis

22 February 2024

(1) Background: To estimate resistance, reactance, and phase angle values among moderate preterm infants and their variation according to neonatal and maternal characteristics and nutritional intake. (2) Methods: This was a cohort that evaluated 43 m...

(This article belongs to the Special Issue Effects of Early Nutrition on Premature Infants)
  • Article
  • Open Access
1 Citations
1,745 Views
13 Pages

12 September 2023

In this paper, we consider optimization problems with stochastic constraints. We derive quantitative stability results for the optimal value function, the optimal solution set and the feasible solution set of optimization models in which the underlyi...

  • Article
  • Open Access
7 Citations
2,896 Views
18 Pages

4 July 2024

This cross-sectional study aimed to examine the association of various aspects of physical activity, including intensity, duration, type, and purpose, with the phase angle (PhA), an objective indicator of health, in Korean adults after stratification...

(This article belongs to the Section Sports Nutrition)
  • Article
  • Open Access
8 Citations
2,743 Views
9 Pages

23 March 2022

In this paper, a tensor splitting AOR iterative method for solving the H+-tensor absolute value equation is presented. Some sufficient conditions for the existence of the solution to the tensor absolute value equation are given. Under suitable condit...

(This article belongs to the Special Issue Numerical Analysis and Scientific Computing II)
  • Article
  • Open Access
14 Citations
3,845 Views
17 Pages

18 August 2021

In recent years, Germany has experienced an increasing number of extreme wet and dry years. In the North German lowlands, wet grassland sites with shallow water table conditions are widespread landscape elements. They are characterized by a special w...

(This article belongs to the Section Water and Climate Change)
  • Article
  • Open Access
4 Citations
1,865 Views
13 Pages

Test–Retest Reliability of Isokinetic Strength in Lower Limbs under Single and Dual Task Conditions in Women with Fibromyalgia

  • Mari Carmen Gomez-Alvaro,
  • Juan Luis Leon-Llamas,
  • Maria Melo-Alonso,
  • Santos Villafaina,
  • Francisco Javier Domínguez-Muñoz and
  • Narcis Gusi

24 February 2024

Background: Previous research has established good test–retest reliability for isokinetic dynamometry in fibromyalgia. However, the reliability of this test under dual-task conditions has not been investigated in fibromyalgia. Methods: A total...

(This article belongs to the Section Sports Medicine)
  • Article
  • Open Access
7 Citations
3,419 Views
13 Pages

New Results on F-Contractions in Complete Metric Spaces

  • Jelena Vujaković,
  • Nataša Kontrec,
  • Marina Tošić,
  • Nicola Fabiano and
  • Stojan Radenović

21 December 2021

The main purpose of this paper is to improve, generalize, unify, extend and enrich the recent results established by Dung and Hang (2015), Piri and Kumam (2014, 2016), and Singh et al. (2018). In our proofs, we only use the property (F1) of Wardowski...

(This article belongs to the Special Issue General Metric Spaces: Usage and Applications in Statistics and Fixed Point Theory)
  • Feature Paper
  • Article
  • Open Access
6 Citations
3,790 Views
18 Pages

3 July 2021

The behavior of all the solutions of the logistic equation with delay and diffusion in a sufficiently small positive neighborhood of the equilibrium state is studied. It is assumed that the Andronov–Hopf bifurcation conditions are met for the coeffic...

(This article belongs to the Special Issue Recent Advances in Differential Equations and Applications)
  • Article
  • Open Access
1 Citations
2,013 Views
14 Pages

20 January 2022

In this paper, by using the normal subdifferential and equilibrium-like function we first obtain some properties for K-preinvex set-valued maps. Secondly, in terms of this equilibrium-like function, we establish some sufficient conditions for the exi...

(This article belongs to the Special Issue Applied Functional Analysis and Applications)
  • Feature Paper
  • Article
  • Open Access
4 Citations
2,853 Views
24 Pages

5 May 2022

In this work, a finite-horizon zero-sum linear-quadratic differential game, modeling a pursuit-evasion problem, was considered. In the game’s cost function, the cost of the control of the minimizing player (the minimizer/the pursuer) was much smaller...

(This article belongs to the Special Issue Singularly Perturbed Problems: Asymptotic Analysis and Approximate Solution)
  • Article
  • Open Access
17 Citations
6,968 Views
16 Pages

Automatic Scoring System for Monitoring Foot Pad Dermatitis in Broilers

  • Helen Louton,
  • Shana Bergmann,
  • Andre Piller,
  • Michael Erhard,
  • Jenny Stracke,
  • Birgit Spindler,
  • Paul Schmidt,
  • Jan Schulte-Landwehr and
  • Angela Schwarzer

The assessment of foot pad dermatitis at slaughter is a suitable method to assess and monitor the welfare of broilers. The goals of this study were to define and validate a camera-based score that could identify macroscopic lesions of the foot pads,...

(This article belongs to the Special Issue Animal Hygiene on Farms - Realising Animal Health Prevention)
  • Article
  • Open Access
8 Citations
1,921 Views
17 Pages

12 November 2021

In this paper, we establish sufficient Karush–Kuhn–Tucker (for short, KKT) conditions of a set-valued semi-infinite programming problem (SP) via the notion of contingent epiderivative of set-valued maps. We also derive duality results of Mond–Weir (M...

(This article belongs to the Special Issue Calculus of Variations and Nonlinear Partial Differential Equations)
  • Article
  • Open Access
3 Citations
960 Views
13 Pages

9 January 2025

In this paper, a class of controlled variational control models is studied by considering the notion of (q,w)π-invexity. Our aim is to investigate a solution set in the considered interval-valued controlled models. To achieve this, we estab...

(This article belongs to the Special Issue Recent Trends in Convex Analysis and Mathematical Inequalities)
  • Article
  • Open Access
3 Citations
1,983 Views
11 Pages

1 November 2021

We present solutions for general theorems regarding algebraic independence of solutions of hypergeometric equation ensembles and the values of these solutions at algebraic points. The conditions of the theorems are necessary and sufficient. Furthermo...

(This article belongs to the Section Algebra and Number Theory)
  • Feature Paper
  • Article
  • Open Access
9 Citations
3,467 Views
23 Pages

Leveraging Multiple Data Streams for Prioritization of Mixtures for Hazard Characterization

  • Brianna N. Rivera,
  • Christine C. Ghetu,
  • Yvonne Chang,
  • Lisa Truong,
  • Robyn L. Tanguay,
  • Kim A. Anderson and
  • Susan C. Tilton

29 October 2022

There is a growing need to establish alternative approaches for mixture safety assessment of polycyclic aromatic hydrocarbons (PAHs). Due to limitations with current component-based approaches, and the lack of established methods for using whole mixt...

(This article belongs to the Special Issue Toxic Mixtures Evaluation and Management)
  • Article
  • Open Access
4 Citations
3,597 Views
16 Pages

25 November 2019

Obtaining the reverberation time of a multipurpose building is most effective when accurate data is used to simulate the building. Therefore, this study proposes a method of measuring the sound absorption coefficient that is close to the sound absorp...

(This article belongs to the Section Sustainable Engineering and Science)
  • Article
  • Open Access
45 Citations
9,514 Views
20 Pages

Combined Effects of Nitrogen Concentration and Seasonal Changes on the Production of Lipids in Nannochloropsis oculata

  • Martin Olofsson,
  • Teresa Lamela,
  • Emmelie Nilsson,
  • Jean-Pascal Bergé,
  • Victória Del Pino,
  • Pauliina Uronen and
  • Catherine Legrand

31 March 2014

Instead of sole nutrient starvation to boost algal lipid production, we addressed nutrient limitation at two different seasons (autumn and spring) during outdoor cultivation in flat panel photobioreactors. Lipid accumulation, biomass and lipid produc...

(This article belongs to the Special Issue Advances and New Perspectives in Marine Biotechnology)
  • Article
  • Open Access
1 Citations
1,837 Views
15 Pages

Closeness Centrality of Asymmetric Trees and Triangular Numbers

  • Nytha Ramanathan,
  • Eduardo Ramirez,
  • Dorothy Suzuki-Burke and
  • Darren A. Narayan

26 September 2024

The combinatorial problem in this paper is motivated by a variant of the famous traveling salesman problem where the salesman must return to the starting point after each delivery. The total length of a delivery route is related to a metric known as...

(This article belongs to the Special Issue Graph Theory and Applications, 2nd Edition)
  • Article
  • Open Access
12 Citations
3,787 Views
19 Pages

3 June 2019

The problem of complete controllability of a linear time-invariant singularly-perturbed system with multiple commensurate non-small delays in the slow state variables is considered. An approach to the time-scale separation of the original singularly-...

(This article belongs to the Special Issue Singularly Perturbed Problems: Asymptotic Analysis and Approximate Solution)
  • Article
  • Open Access
9 Citations
1,514 Views
10 Pages

An Investigation of the Gamow-Teller 1+ States in 90Nb Isotopes

  • Tahsin Babacan,
  • Djavad I. Salamov and
  • Atalay Küçükbursa

1 December 2005

In this study, based on Pyatov-Salamov method, the properties of the Gamow-Teller(GT) 1+ states in 90 Nb have been investigated and the agreement of our results calculated by this method for the energy of Gamow-Teller Resonance (GTR) and the correspo...

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