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Found 6383 publications

Effect of variable rate phosphorus and nitrogen fertilizing on winter wheat (Triticum aestivum L.) in Mezőföld, Hungary

G. Milics A. Vér L. Szekeres J. Kauser

Publication Name: Precision Agriculture 2019 Papers Presented at the 12th European Conference on Precision Agriculture Ecpa 2019

Publication Date: 2019-01-01

Volume: Unknown

Issue: Unknown

Page Range: 547-553

Description:

Variable rate technology (VRT) in nutrient management has been developed in order to apply crop inputs according to the required amount of fertilizers. There is an ongoing debate among experts on how to define management zones as well as how to define the required amount of fertilizers for phosphorus and nitrogen replenishment for winter wheat (Triticum aestivum L.) production. The objective of the study reported in this paper was to investigate the effect of variable rate phosphorus and nitrogen fertilizer application in winter wheat in Mezőföld, Hungary. Winter wheat production based on variable rate nutrient treatment resulted in 1.19 t/ha more yield than the farm average while applying an average 108 kg/ha less nitrogen and 37 kg/ha more phosphorus fertilizer.

Open Access: Yes

DOI: 10.3920/978-90-8686-888-9_68

Rearing a child with a language disorder: parents experiences with speech and language therapy services in 10 countries

Isabel R. Rodriguez-Ortiz Sam Harding Rena Lyons Maja Kelić Kristine M. Jensen de López Inge S. Klatte Julie Feilberg Sofia Baena Tina C. Mantel Thora S. Ulfsdottir Rama Novogrodsky Krisztina Zajdó

Publication Name: Journal of Public Health Germany

Publication Date: 2026-01-01

Volume: 34

Issue: 1

Page Range: 91-99

Description:

Aim: Collaboration between speech and language therapists and parents to help children with language disorders has always been important. The majority of published work is from the perspective of the therapist and what they think and feel parents need to help their children. However, less is known about (1) the processes parents try to access and receive services; (2) how they perceive the journey; and (3) what they think about the service provided to their child. This paper describes an exploration of how parents experience identification and access of services for their children living with language disorders. Subjects and methods: Parents from ten countries, with a child who had received services for speech language disorder participated in semi-structured qualitative interviews. Thematic analysis was used to interpret the data. Results: Two main themes were constructed: (1) Parental recognition of the need for services; and (2) difficulties accessing services. Parents detailed how they recognised that their children needed services and how they went about securing them. Parents recounted the process they undertook; from their initial concerns about their child’s development, the feelings this engendered, and how they tried to get support and treatment. Parents talked about the factors that made them decide they had to fight to gain access to services for their children. Conclusions: Across countries, parents encounter similar experiences. The major obstacles identified by parents lead to the perception of delay in obtaining access to services. Identifying the services that children required was the first hurdle, even before getting a referral to them.

Open Access: Yes

DOI: 10.1007/s10389-024-02264-5

The effect of wavelet analyis on entropy based fuzzy classification of colonoscopy images

Brigita Sziova László T. Kóczy Szilvia Nagy

Publication Name: Iwaciii 2017 5th International Workshop on Advanced Computational Intelligence and Intelligent Informatics

Publication Date: 2017-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Colorectal polyp detection is important in preventing cancer. Structural entropy can detect different structures of distributions, such as image pixel brightness. Wavelet analysis can help in separating large-scale and fine resolution behaviour. In the method presented in this paper, the colonoscopy images are separated into segments, and a classification scheme is built in order to determine, whether there is a polyp part in the image segment or not. Without wavelet analysis edge density and structural entropy can be a basis of fuzzy classification for the polyp content of only good quality colonoscopy images, and still has about 10 percent false classification. In this contribution the effect of wavelet analysis on the classification scheme is studied.

Open Access: Yes

DOI: DOI not available

Creep behaviour of day-old chicken corrugated paperboard packaging under different uniaxial compression loads—An experimental study

Péter Böröcz Renáta Pidl Lajos Fehér

Publication Name: Packaging Technology and Science

Publication Date: 2024-01-01

Volume: 37

Issue: 1

Page Range: 51-63

Description:

One of the most important elements for animal transportation is the packaging that ensures the safety and health of the transit. During the transport of live small animals, such as day-old chickens, the animals may only stay in the boxes for a very limited period, in this case, 48 h. Therefore, it is important to be able to model the strength behaviour of these boxes concerning packaging material requirements and sustainability. The aim of this study was to determine the short- and relatively long-term strength of day-old chicken packages to better estimate packaging design and to use these data to establish an analytical creep model with suitable parameters that adequately approximate the measured data. Two types of packages were tested, and two types of creep models were used to model the creep strain-time graphs. The creep behaviour of the two samples was tested at four different uniaxial load cases, with consistent environmental conditions during the tests (23°C and 50% relative humidity [RH]). At the two highest loads, both samples failed before the 48-h cycle, indicating a significant difference in box strength between short-term and long-term load tests. The secondary creep strain rate increases with the magnitude of the compressive load. When comparing the two creep models for both box types, the Power law provided the best accuracy at the 50% of box compression test (BCT) load case, while at the other three load cases, the Andrade law showed better predictions.

Open Access: Yes

DOI: 10.1002/pts.2780

Simulation of uniaxial anisotropy by vector Preisach model

Miklós Kuczmann

Publication Name: Pollack Periodica

Publication Date: 2010-08-01

Volume: 5

Issue: 2

Page Range: 97-106

Description:

The paper presents a rotational single sheet tester, which can be used to measure vector hysteresis characteristics using specimen with round shape. The measured hysteresis characteristics in the two orthogonal directions present the uniaxial anisotropy of the material under test, which has been handled by the Fourier expansion of the measured Everett functions. The Fourier coefficients of the unknown vector Everett function have been identified by the modification of a previously implemented algorithm. In the identification task linearly and circularly polarized measured data have been taken into account. Comparisons between measured and simulated data show acceptable results.

Open Access: Yes

DOI: 10.1556/Pollack.5.2010.2.10

Computer model for font legibility measurement

Gábor Dömötör András Horváth

Publication Name: Intelligent Decision Technologies

Publication Date: 2017-01-01

Volume: 11

Issue: 3

Page Range: 335-344

Description:

Selecting a good typeface (or font) has a high importance in typography, web-design, ergonomics and similar fields. A key concept of this topic is the legibility of the fonts, which measures how easy it is to recognise the difference between the letters in a specific typeface. The typical investigations to measure this feature are based on human experiments. In this paper, a new approach and a simulation software are proposed to measure font legibility. A program, that simulates the distortion effects of the human retina is applied to test images of characters and optical character recognition software is used to investigate its output. This way the optical, biological, and cognitive steps of human character recognition is modelled. Although, the simulation cannot be perfect, the computer program can investigate much more fonts, characters with a lot of settings (e.g. for different visual acuity) than human experiments and gives reproducible results that are independent of fatigue, misunderstanding and other human limits.

Open Access: Yes

DOI: 10.3233/IDT-170299

Measuring and the hysteresis characteristics of permanent magnet

Miklós Kuczmann Gergely Kovács

Publication Name: Physica B Condensed Matter

Publication Date: 2018-11-15

Volume: 549

Issue: Unknown

Page Range: 62-68

Description:

Knowledge of the hysteresis characteristics of permanent magnets is one of the focal point of electric motor design. Permanent magnets are widely used in PMSM (Permanent Magnet Synchronous Motor) and BLDC (Brushless DC) motors that can be found in electric vehicles. The paper deals with the implementation of a permanent magnet measurement set-up as well as the finite element simulation of the developed arrangement. The purpose of this work is to realize an accurate model of permanent magnet obtained by measurement parameters.

Open Access: Yes

DOI: 10.1016/j.physb.2017.09.090

Influence of frequency resolution in case of frequency response function measurement in structural dynamics

Balázs Vehovszky Zoltán Gazdagh

Publication Name: Acta Technica Jaurinensis

Publication Date: 2021-11-24

Volume: 14

Issue: 4

Page Range: 508-520

Description:

Frequency resolution is an essential parameter in acoustical testing, even if we are using numerical or experimental method, for example when determining frequency response function (FRF) of a dynamic mechanical system, or executing modal analysis based on the FRFs. Finer resolution leads to more accurate results, at the expense of longer calculation/measurement process and larger data size. This parameter is generally set based on rules of thumb, prior practice or with big margin for safety. This results in waste time and data storage if the required frequency resolution is overestimated, or even significant errors in the results, if it is underestimated. Present paper offers a direct, method for the conscious determination of optimal frequency resolution. It is based fully on theoretical considerations, and investigates amplitude and phase distortion at resonances as target parameters. Beside defining the steps of the process, it is tested on a real structure, and the results are presented as well, proving the applicability and the appropriateness of the method. With this method, development engineers get a practical tool for adjusting the parameters of dynamic measurements and simulations.

Open Access: Yes

DOI: 10.14513/actatechjaur.00618

Predictive feasibility assessment for HBIM survey planning: An uncertainty-aware framework for terrestrial laser scanning in heritage documentation

Kitti Karolyfi Nóra Géczy Rnin Salah

Publication Name: Results in Engineering

Publication Date: 2026-06-01

Volume: 30

Issue: Unknown

Page Range: Unknown

Description:

This paper presents an enhanced predictive framework, denoted as the Predictive Scan Feasibility Estimation Model (PSFEM), developed to support reliable data acquisition planning for Historic Building Information Modeling (HBIM) applications. The proposed formulation addresses limitations of Terrestrial Laser Scanning (TLS) in heritage documentation, particularly those associated with restricted access, vegetation-induced occlusions, and unfavorable scanner–structure geometries. An Adjusted Scan Feasibility Index (SFIadj) is introduced to quantify expected scan feasibility under environmental and geometric constraints. The formulation incorporates a structured uncertainty factor together with two environment-dependent modifiers, namely the Vegetation Density Index (VDI) and the Access Factor (AF), enabling representation of macro-occlusions and accessibility constraints through deterministic environmental adjustment. In addition, the geometric model incorporates distance, height, and Field-of-View (FOV) parameters, with improved representation of vertical visibility based on a sinusoidal function. The accuracy and effectiveness of the proposed model are validated through two heritage chapel case studies representing distinct scanning challenges. The first case involves a densely vegetated environment characterized by significant occlusions, while the second examines controlled variations in scanner-to-object distance to evaluate the influence of incidence angles on roof visibility. Multiple TLS surveys are conducted to obtain empirical coverage data for comparison. The results demonstrate that the PSFEM accurately reproduces global and element-level visibility, achieving improved agreement with measured coverage compared to geometric deterministic formulations, while reducing overestimation of feasible coverage under occlusion- and access-constrained conditions and providing a quantitative basis for identifying coverage deficiencies during the planning stage.

Open Access: Yes

DOI: 10.1016/j.rineng.2026.110874