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325 Results Found

  • Article
  • Open Access
30 Citations
12,791 Views
29 Pages

3 July 2013

As LADAR systems applications gradually become more diverse, new types of systems are being developed. When developing new systems, simulation studies are an essential prerequisite. A simulator enables performance predictions and optimal system param...

  • Article
  • Open Access
4 Citations
1,104 Views
19 Pages

25 August 2024

This paper provides a parametric analysis of cable–strut tensegrity domes subjected to periodic loads. This analysis aims at determining the main regions of dynamic instability (unstable regions). From the point of view of the physical interpre...

  • Communication
  • Open Access
1 Citations
5,889 Views
20 Pages

Transforming DIY Geiger Counter Kits into Muon Detectors for Education and Scientific Exploration

  • Marco Arcani,
  • Domenico Liguori,
  • Andrea Frassà,
  • Altea Renata Maria Nemolato,
  • Omar Del Monte and
  • Cesare Guaita

12 July 2024

Any Geiger counter can be used as an effective cosmic ray detector on its own. In fact, it is known that even in the absence of a radioactive source, the instrument detects what is known as background radiation, which consists of various types of ion...

  • Review
  • Open Access
45 Citations
16,639 Views
14 Pages

8 April 2016

This article reviews MIT Lincoln Laboratory's work over the past 20 years to develop photon-sensitive image sensors based on arrays of silicon Geiger-mode avalanche photodiodes. Integration of these detectors to all-digital CMOS readout circuits enab...

  • Feature Paper
  • Article
  • Open Access
76 Citations
13,764 Views
16 Pages

Evaluation of Single Photon and Geiger Mode Lidar for the 3D Elevation Program

  • Jason M. Stoker,
  • Qassim A. Abdullah,
  • Amar Nayegandhi and
  • Jayna Winehouse

19 September 2016

Data acquired by Harris Corporation’s (Melbourne, FL, USA) Geiger-mode IntelliEarth™ sensor and Sigma Space Corporation’s (Lanham-Seabrook, MD, USA) Single Photon HRQLS sensor were evaluated and compared to accepted 3D Elevation Program (3DEP) data a...

  • Article
  • Open Access
23 Citations
6,288 Views
16 Pages

Assessment of Climate Change in Central Asia from 1980 to 2100 Using the Köppen-Geiger Climate Classification

  • Huili He,
  • Geping Luo,
  • Peng Cai,
  • Rafiq Hamdi,
  • Piet Termonia,
  • Philippe De Maeyer,
  • Alishir Kurban and
  • Jianjun Li

17 January 2021

The accelerated global warming and heterogeneous change in precipitation have been resulting in climate system shifts, which plays a key role in the stability of ecosystem and social economic development. Central Asia is account 80% of the temperate...

  • Article
  • Open Access
3 Citations
3,595 Views
17 Pages

Breadboard of Microchip Laser and Avalanche Photodiode in Geiger and Linear Mode for LiDAR Applications

  • Ana de Sousa,
  • Rafael Pinto,
  • Bruno Couto,
  • Beltran Nadal,
  • Hugo Onderwater,
  • Paulo Gordo,
  • Manuel Abreu,
  • Rui Melicio and
  • Patrick Michel

3 May 2023

This paper reports the implementation of two critical technologies used in light detection and ranging for space applications: (1) a microchip Q-switched laser breadboard; (2) a breadboard of an indium gallium arsenide avalanche photodiode working at...

  • Article
  • Open Access
9 Citations
4,291 Views
22 Pages

Simulation and Design of Circular Scanning Airborne Geiger Mode Lidar for High-Resolution Topographic Mapping

  • Fanghua Liu,
  • Yan He,
  • Weibiao Chen,
  • Yuan Luo,
  • Jiayong Yu,
  • Yongqiang Chen,
  • Chongmiao Jiao and
  • Meizhong Liu

11 May 2022

Over the last two decades, Geiger-mode lidar (GML) systems have been developing rapidly in defense and commercial applications, demonstrating high point density and great collection efficiency. We presented a circular scanning GML system simulation m...

  • Article
  • Open Access
509 Views
18 Pages

24 November 2025

This paper presents a reliability analysis of four distinct design solutions, known as Geiger domes. These domes possess two intrinsic characteristics of tensegrity structures: infinitesimal mechanisms and self-stress states. In the absence of self-s...

  • Article
  • Open Access
12 Citations
5,626 Views
24 Pages

Influence of Bias Correction Methods on Simulated Köppen−Geiger Climate Zones in Europe

  • Beáta Szabó-Takács,
  • Aleš Farda,
  • Petr Skalák and
  • Jan Meitner

22 January 2019

Our goal was to investigate the influence of bias correction methods on climate simulations over the European domain. We calculated the Köppen−Geiger climate classification using five individual regional climate models (RCM) of the ENSEMBL...

  • Article
  • Open Access
13 Citations
10,514 Views
27 Pages

Historic Changes and Future Projections in Köppen–Geiger Climate Classifications in Major Wine Regions Worldwide

  • Cristina Andrade,
  • André Fonseca,
  • João A. Santos,
  • Benjamin Bois and
  • Gregory V. Jones

27 June 2024

A valuable tool for comprehending and characterizing climate patterns on a global scale is the Köppen–Geiger climate classification system. When it comes to wine production, the climate of a region plays an essential role in determining wh...

  • Article
  • Open Access
312 Views
23 Pages

Kazakhstan, located in Central Asia, is experiencing faster warming than the global trend, making it an important region regarding the study of how climate change is affecting climatic zones. This research aims to identify projected shifts in Kö...

  • Article
  • Open Access
6 Citations
5,803 Views
22 Pages

Climate change is altering the conditions to which communities have adapted. The Köppen–Geiger classification system can provide a compact metric to identify regions with notable changes in climatic conditions. Shifting Köppen–G...

  • Correction
  • Open Access
1 Citations
854 Views
1 Page

Correction: Geiger et al. Reassessing and Extending the European Standards of Care for Newborn Health: How to Keep Reference Standards in Line with Current Evidence. Children 2024, 11, 179

  • Isabel Geiger,
  • Johanna Kostenzer,
  • Valerie Matthäus,
  • on behalf of the ESCNH Chair Committee,
  • Silke Mader and
  • Luc J. I. Zimmermann

In the original publication [...]

  • Article
  • Open Access
40 Citations
9,267 Views
27 Pages

Comparative Analysis of Multi-Platform, Multi-Resolution, Multi-Temporal LiDAR Data for Forest Inventory

  • Yi-Chun Lin,
  • Jinyuan Shao,
  • Sang-Yeop Shin,
  • Zainab Saka,
  • Mina Joseph,
  • Raja Manish,
  • Songlin Fei and
  • Ayman Habib

29 January 2022

LiDAR technology is rapidly evolving as various new systems emerge, providing unprecedented data to characterize forest vertical structure. Data from different LiDAR systems present distinct characteristics owing to a combined effect of sensor specif...

  • Article
  • Open Access
5 Citations
4,432 Views
16 Pages

19 September 2022

Since the nuclear energy leakage that occurred at the Fukushima nuclear power plant in Japan, people have paid more attention to the danger of environmental radiation. Environmental radiation is monitored using Geiger counters, which are not easy to...

  • Article
  • Open Access
17 Citations
8,071 Views
22 Pages

Performance Analysis of Geiger–Müller and Cadmium Zinc Telluride Sensors Envisaging Airborne Radiological Monitoring in NORM Sites

  • Jorge Borbinha,
  • Yuriy Romanets,
  • Pedro Teles,
  • José Corisco,
  • Pedro Vaz,
  • Diogo Carvalho,
  • Yoeri Brouwer,
  • Raul Luís,
  • Luís Pinto and
  • Bruno Gonçalves
  • + 4 authors

10 March 2020

Radiological monitoring is fundamental for compliance with radiological protection policies in the aftermath of radiological events, such as nuclear accidents, terrorism, and out-of-commission uranium mines. An effective strategy for radiation monito...

  • Article
  • Open Access
21 Citations
4,763 Views
18 Pages

Climate Classification for Major Cities in China Using Cluster Analysis

  • Huashuai Duan,
  • Qinglan Li,
  • Lunkai He,
  • Jiali Zhang,
  • Hongyu An,
  • Riaz Ali and
  • Majid Vazifedoust

21 June 2024

Climate classification plays a fundamental role in understanding climatic patterns, particularly in the context of a changing climate. This study utilized hourly meteorological data from 36 major cities in China from 2011 to 2021, including 2 m tempe...

  • Article
  • Open Access
7 Citations
2,261 Views
27 Pages

High-quality image restoration is typically challenging due to low signal–to–background ratios (SBRs) and limited statistics frames. To address these challenges, this paper devised a method based on fractional-order total variation (FOTV)...

  • Article
  • Open Access
1,742 Views
25 Pages

A Multi-Scale Spatio-Temporal Fusion Network for Occluded Small Object Detection in Geiger-Mode Avalanche Photodiode LiDAR Systems

  • Yuanxue Ding,
  • Dakuan Du,
  • Jianfeng Sun,
  • Le Ma,
  • Xianhui Yang,
  • Rui He,
  • Jie Lu and
  • Yanchen Qu

22 February 2025

The Geiger-Mode Avalanche Photodiode (Gm-APD) LiDAR system demonstrates high-precision detection capabilities over long distances. However, the detection of occluded small objects at long distances poses significant challenges, limiting its practical...

  • Article
  • Open Access
13 Citations
4,317 Views
31 Pages

Comparative Evaluation of a Newly Developed Trunk-Based Tree Detection/Localization Strategy on Leaf-Off LiDAR Point Clouds with Varying Characteristics

  • Tian Zhou,
  • Renato César dos Santos,
  • Jidong Liu,
  • Yi-Chun Lin,
  • William Changhao Fei,
  • Songlin Fei and
  • Ayman Habib

4 August 2022

LiDAR data acquired by various platforms provide unprecedented data for forest inventory and management. Among its applications, individual tree detection and segmentation are critical and prerequisite steps for deriving forest structural metrics, es...

  • Article
  • Open Access
2 Citations
1,941 Views
21 Pages

A Geiger-mode avalanche photodiode (GM-APD) laser radar range image has much noise when the signal-to-background ratios (SBRs) are low, making it difficult to recover the real target scene. In this paper, based on the GM-APD lidar denoising model of...

  • Article
  • Open Access
4 Citations
3,285 Views
10 Pages

18 February 2021

The rapid developments in high-throughput sequencing technologies have allowed researchers to analyze the full genomic sequence of organisms faster and cheaper than ever before. An important application of such advancements is to identify the impact...

  • Data Descriptor
  • Open Access
1,443 Views
13 Pages

16 May 2025

This data descriptor presents δ-MedBioclim, a newly developed dataset for the Euro-Mediterranean region. This dataset applies the delta-change method by comparing the values of 25 General Circulation Models (GCMs) for the reference period (1981...

  • Review
  • Open Access
119 Citations
15,906 Views
48 Pages

Approaches to Outdoor Thermal Comfort Thresholds through Public Space Design: A Review

  • Andre Santos Nouri,
  • João Pedro Costa,
  • Mattheos Santamouris and
  • Andreas Matzarakis

14 March 2018

Based on the Köppen Geiger (KG) classification system, this review article examines existing studies and projects that have endeavoured to address local outdoor thermal comfort thresholds through Public Space Design (PSD). The review is divided into...

  • Article
  • Open Access
38 Citations
5,780 Views
21 Pages

The Seasonality of Surface Urban Heat Islands across Climates

  • Panagiotis Sismanidis,
  • Benjamin Bechtel,
  • Mike Perry and
  • Darren Ghent

11 May 2022

In this work, we investigate how the seasonal hysteresis of the Surface Urban Heat Island Intensity (SUHII) differs across climates and provide a detailed typology of the daytime and nighttime SUHII hysteresis loops. Instead of the typical tropical/d...

  • Article
  • Open Access
6 Citations
7,259 Views
14 Pages

20 October 2016

A readout integrated circuit (ROIC) using two-step fastest signal identification (FSI) is proposed to reduce the number of input channels of a data acquisition (DAQ) block with a high-channel reduction ratio. The two-step FSI enables the proposed ROI...

  • Article
  • Open Access
3 Citations
1,201 Views
20 Pages

Spatiotemporal Patterns of Avian Species Richness Across Climatic Regions

  • Çağdan Uyar,
  • Serkan Özdemir,
  • Dalia Perkumienė,
  • Marius Aleinikovas,
  • Benas Šilinskas and
  • Mindaugas Škėma

7 August 2025

This study highlights the spatial, seasonal, and climatic variations in bird species richness across Türkiye, a country with rich avian richness situated at the intersection of major migratory routes. Bird species richness was calculated for eac...

  • Article
  • Open Access
2 Citations
4,222 Views
17 Pages

Project Gatekeeper: An Entrance Control System Embedded Radiation Detection Capability for Security Applications

  • Peter G. Martin,
  • Yannick Verbelen,
  • Elia Sciama Bandel,
  • Mark Andrews and
  • Thomas B. Scott

23 May 2020

Threat assessments continue to conclude that terrorist groups and individuals as well as those wanting to cause harm to society have the ambition and increasing means to acquire unconventional weapons such as improvised nuclear explosive devices and...

  • Article
  • Open Access
6 Citations
3,205 Views
18 Pages

Basic Performance Evaluation of a Radiation Survey Meter That Uses a Plastic-Scintillation Sensor

  • Keisuke Yamamoto,
  • Ryota Shindo,
  • Saya Ohno,
  • Satoe Konta,
  • Rio Isobe,
  • Yohei Inaba,
  • Masatoshi Suzuki,
  • Yoshio Hosoi and
  • Koichi Chida

7 May 2024

After the Fukushima nuclear power plant accident in 2011, many types of survey meters were used, including Geiger–Müller (GM) survey meters, which have long been used to measure β-rays. Recently, however, a novel radiation survey mete...

  • Article
  • Open Access
1,017 Views
17 Pages

15 May 2025

In terms of climate change, while tourism’s natural resources may be considered climate vulnerable, a large part of tourism’s primary industries are high carbon consumers. With the growth of worldwide efforts to adopt climate resilience a...

  • Article
  • Open Access
13 Citations
4,415 Views
16 Pages

19 August 2021

Land and climate are strongly connected through multiple interface processes and climate change may lead to significant changes in land use. In this study, high-resolution observational gridded datasets are used to assess modifications in the Köppen–...

  • Review
  • Open Access
23 Citations
5,234 Views
42 Pages

18 January 2023

The building envelope provides thermal comfort, an excellent visual view, and sunlight for the occupants. It consists of two parts: (i) an opaque (non-transparent) part (e.g., walls and roofs) and (ii) a transparent part (e.g., windows, curtain walls...

  • Article
  • Open Access
3 Citations
1,929 Views
22 Pages

Indoor environmental quality (IEQ), encompassing thermal comfort and indoor air quality (IAQ), plays a crucial role in occupant well-being and operational performance. Although widely studied individually, integrating thermal comfort and IAQ assessme...

  • Article
  • Open Access
25 Citations
4,327 Views
23 Pages

13 December 2021

Accurate land use and cover data are essential for effective land-use planning, hydrological modeling, and policy development. Since the Okavango Delta is a transboundary Ramsar site, managing natural resources within the Okavango Basin is undoubtedl...

  • Article
  • Open Access
8 Citations
4,519 Views
26 Pages

28 June 2024

The viewpoint and reaction of a country towards climate change are shaped by its political, cultural, and scientific backgrounds, in addition to the distinct characteristics of its evolving climate and the anticipated and actual consequences of the p...

  • Letter
  • Open Access
3 Citations
3,143 Views
10 Pages

18 January 2021

The purpose of the article is to check and assess what radiation is emitted by particular building materials with the passage of time. The analysis was performed with the EKO-C dosimetry device from Polon-Ekolab. The scope of the work included resear...

  • Article
  • Open Access
1 Citations
4,842 Views
15 Pages

Non-Steroidal Biphenyl Gelators: Correlation of Xerogel Structure with Solid-State Structure and Circular Dichroism Spectroscopy

  • H. Cristina Geiger,
  • David K. Geiger,
  • William R. Roberts,
  • Dominic L. Morell,
  • Paul Huttunen,
  • Jennifer L. Schulman,
  • Melanie Tran and
  • Dori Farthing

16 April 2018

Because the factors favoring the formation of well-formed single crystals are dissimilar to those conducive to gel formation, few examples of single-crystal structural characterizations of organogelators are found in the literature. A series of biphe...

  • Article
  • Open Access
15 Citations
6,813 Views
15 Pages

Application of CMOS Technology to Silicon Photomultiplier Sensors

  • Nicola D’Ascenzo,
  • Xi Zhang and
  • Qingguo Xie

25 September 2017

We use the 180 nm GLOBALFOUNDRIES (GF) BCDLite CMOS process for the production of a silicon photomultiplier prototype. We study the main characteristics of the developed sensor in comparison with commercial SiPMs obtained in custom technologies and o...

  • Review
  • Open Access
9 Citations
5,418 Views
27 Pages

An Overview of CMOS Photodetectors Utilizing Current-Assistance for Swift and Efficient Photo-Carrier Detection

  • Gobinath Jegannathan,
  • Volodymyr Seliuchenko,
  • Thomas Van den Dries,
  • Thomas Lapauw,
  • Sven Boulanger,
  • Hans Ingelberts and
  • Maarten Kuijk

4 July 2021

This review paper presents an assortment of research on a family of photodetectors which use the same base mechanism, current assistance, for the operation. Current assistance is used to create a drift field in the semiconductor, more specifically si...

  • Article
  • Open Access
3 Citations
2,798 Views
24 Pages

15 March 2023

The present study aims to evaluate the performance of evaporation-assisted humidification–dehumidification (E-HDH) desalination, specifically direct evaporative (DE-HDH), indirect evaporative (IE-HDH), and Maisotsenko evaporative (ME-HDH) syste...

  • Feature Paper
  • Article
  • Open Access
19 Citations
5,970 Views
18 Pages

Biogeographic Overview of Ulmaceae: Diversity, Distribution, Ecological Preferences, and Conservation Status

  • Yann Fragnière,
  • Yi-Gang Song,
  • Laurence Fazan,
  • Steven R. Manchester,
  • Giuseppe Garfì and
  • Gregor Kozlowski

31 May 2021

The elm family (Ulmaceae) is a woody plant group with important scientific, societal, and economic value. We aim to present the first biogeographic synthesis investigating the global diversity, distribution, ecological preferences, and the conservati...

  • Article
  • Open Access
16 Citations
7,052 Views
14 Pages

Development of Microcontroller-Based System for Background Radiation Monitoring

  • Andriy Holovatyy,
  • Vasyl Teslyuk,
  • Natalia Kryvinska and
  • Artem Kazarian

20 December 2020

An appearance of radiometers and dosimeters on free sale made it possible to provide better radiation safety for citizens. The effects of radiation may not appear all at once. They can manifest themselves in decades to come in future generations, in...

  • Article
  • Open Access
14 Citations
7,708 Views
15 Pages

Current-Assisted SPAD with Improved p-n Junction and Enhanced NIR Performance

  • Gobinath Jegannathan,
  • Thomas Van den Dries and
  • Maarten Kuijk

11 December 2020

Single-photon avalanche diodes (SPADs) fabricated in conventional CMOS processes typically have limited near infra-red (NIR) sensitivity. This is the consequence of isolating the SPADs in a lowly-doped deep N-type well. In this work, we present a sec...

  • Article
  • Open Access
29 Citations
6,729 Views
19 Pages

18 November 2020

Climate modelling output that was provided under the latest Coupled Model Intercomparison Project (CMIP6) shows significant changes in model-specific Equilibrium Climate Sensitivity (ECS) as compared to CMIP5. The newer versions of many Global Climat...

  • Article
  • Open Access
9 Citations
3,596 Views
20 Pages

Breast Cancer-Derived Microparticles Reduce Cancer Cell Adhesion, an Effect Augmented by Chemotherapy

  • Dvir Shechter,
  • Michal Harel,
  • Abhishek Mukherjee,
  • Leonel M. Sagredo,
  • David Loven,
  • Elad Prinz,
  • Shimrit Avraham,
  • Veronique Orian-Rousseau,
  • Tamar Geiger and
  • Haguy Wolfenson
  • + 1 author

10 October 2020

Tumor cell heterogeneity is primarily dictated by mutational changes, sometimes leading to clones that undergo a metastatic switch. However, little is known about tumor heterogeneity following chemotherapy perturbation. Here we studied the possible i...

  • Article
  • Open Access
3 Citations
5,548 Views
15 Pages

On the Challenge to Correctly Identify Rasboras (Teleostei: Cyprinidae: Danioninae) Inhabiting the Mesangat Wetlands, East Kalimantan, Indonesia

  • Sebastian Hüllen,
  • Chiara Mandl,
  • Matthias F. Geiger,
  • Renny K. Hadiaty,
  • Gema Wahyudewantoro,
  • Thomas Ziegler and
  • Fabian Herder

30 December 2020

Within the subfamily Danioninae, rasborine cyprinids are known as a ‘catch-all’ group, diagnosed by only a few characteristics. Most species closely resemble each other in morphology. Species identification is therefore often challenging....

  • Article
  • Open Access
5 Citations
4,152 Views
20 Pages

Long- and Short-Term Inorganic Nitrogen Runoff from a Karst Catchment in Austria

  • Thomas Dirnböck,
  • Heike Brielmann,
  • Ika Djukic,
  • Sarah Geiger,
  • Andreas Hartmann,
  • Franko Humer,
  • Johannes Kobler,
  • Martin Kralik,
  • Yan Liu and
  • Gisela Pröll
  • + 1 author

20 October 2020

Excess nitrogen (N) deposition and gaseous N emissions from industrial, domestic, and agricultural sources have led to increased nitrate leaching, the loss of biological diversity, and has affected carbon (C) sequestration in forest ecosystems. Nitra...

  • Feature Paper
  • Article
  • Open Access
58 Citations
14,005 Views
22 Pages

Decline in Distribution and Abundance: Urban Hedgehogs under Pressure

  • Anouk L. Taucher,
  • Sandra Gloor,
  • Adrian Dietrich,
  • Madeleine Geiger,
  • Daniel Hegglin and
  • Fabio Bontadina

9 September 2020

Increasing urbanization and densification are two of the largest global threats to biodiversity. However, certain species thrive in urban spaces. Hedgehogs Erinaceus europaeus have been found in higher densities in green areas of settlements as compa...

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