Extreme weather events, particularly heatwaves, are becoming more frequent and intense in urban environments due to climate change. Tirana, a fast-growing metropolitan area, has experienced a notable rise in heatwave frequency and air pollution episodes in recent decades. This study analyses the relationship between elevated aerosol loads and extreme heat waves, aiming to understand the mutual...
Climate change significantly affects primary production by imposing various types of stress on crops and livestock, increasing food safety and scarcity risks. The purpose of this work is to produce regional climate simulations for Greece, which aim to provide the necessary parameters required to calculate crop and livestock stress indices and their changes until the middle of the century, and...
Even though decades of thorough studies have passed, there are still contradictions between scientists both concerning the main factors influencing cloud formation, and on cloud contribution to climate. Thus, until not long ago, it was considered that clouds have an overall cooling effect, while the results of the most recent studies show that clouds have a net positive forcing effect,...
This article evaluates the urban heat island in the city of Galati, in Southeastern Romania, for the months of March and April 2023. Temperature measurements were taken every day in 10 points: five points in the city of Galati and five in the periurban and rural areas. The layout of the 10 points covered the north-south transect, between Galati and Braila, the neighboring city. Other...
A new type of differential absorption lidar is developed that utilizes the properties of multi-chip-stack pulsed, broadband laser diode of microjoule energetic range. The laser wavelengths are tuned on/off a monitored integral resonance molecular absorption spectrum in the selected near-infrared band. The method is based on comprehensive theoretical analysis of molecular absorption...
Energy is very important due to the fact that the need for its exploitation has increased in recent decades. The utilization of various energy resources and the focus on environmentally friendly energy sources represents a major interest in today's world. In this material, we will demonstrate how biomass and other waste can be used to produce carbon bricks for use as an energy source in...
We present a comparative stress field analysis in the Durrës region of Albania based on three datasets: (i) two regional focal mechanism datasets (dr_planA and dr_planB) inverted using GISOLA and StressInverse v1.1.3, and (ii) moment tensor solutions from the November 26, 2019 Mw 6.3 Durrës earthquake sequence provided by the National Observatory of Athens. For each dataset, we estimate the...
Keywords: Southeastern Bulgaria; air and soil temperatures; correlation analysis, ten-day data; soil temperature forecast
Air and soil temperatures are of paramount importance for both the growth and development of agricultural crops, as well as for organizing some basic ago-technical activities. Any change in air temperature leads to such a change in the soil surface and the layers for...
Abstract
In many countries, groundwater is the primary source of drinking water. As these waters remain in constant contact with rocks, the presence of high uranium concentrations can lead to the release of radon gas, which then dissolves into the water. While radon exposure through inhalation poses a greater risk than ingestion, raising awareness among national authorities and the public...
Strong gravitational lensing of quasars is a powerful technique for probing cosmological parameters, tracing galaxy evolution, and investigating the internal structure of quasars. In this work, we explore the galaxy mass profile in lensed quasars expected to be detected by the Roman Space Telescope. Relying on estimates from previous studies, it is expected that approximately one in every 180...
This study investigates the primary factors influencing regional climate variability in South-Eastern Europe, focusing on the role of the North Atlantic Oscillation (NAO) and its internal and external drivers. The analysis considers the impacts of the lower stratospheric ozone, geomagnetic field variations, solar activity, galactic cosmic rays (GCR), and atmospheric CO2. By applying both...
Recently, greenhouse gases (GHG), which include: carbon dioxide, methane, nitrous oxide and other gases, are considered to be the fundamental cause of global climate change. This issue related to climate change has received conclusive attention at a global level. In the specialized literature, carbon dioxide has been considered the most significant gas contributing to global climate change. In...
Analyses of the annual global lightning distribution show that, depending on the underlying surface, lightning frequency over continents is 1–2 orders of magnitude higher than over oceans.
However, studies in specific regions indicate that lightning frequency over water surfaces can exceed that over land, depending on orographic features, the respective season, and the diurnal cycle. This...
Studying biomass-burning aerosols is essential for assessing their impact on climate, air quality, and human health due to their complex interactions with atmospheric processes and radiation. Annually, huge amounts of biomass-burning aerosols are released into the atmosphere as a result of large-scale seasonal wildfires, particularly in regions of the United States and Canada. These aerosols...
The presence of radionuclides in water poses potential risk for health effects, especially when these radionuclides are deposited in human body through drinking. To assesspublic effective dose due to gross alpha and beta in water, 56 tap water samples were collected from different areas in the different cities of Albania. According to Albanian legislation, Article 6, the gross alpha/beta...
The activity concentrations of indoor radon were assessed in the three structures of the University of Aleksandër Moisiu Durrës. The measurements were conducted utilizing a passive technique that relies on CR-39 solid-state nuclear track detectors. Measurements were taken at various floor heights under typical usage scenarios during both warm and cold weather conditions. In a specific case,...
Although the HERA experiments finished data collection more than 15 years ago, there is still a lively program ongoing within the H1 Collaboration, with maximum effort put into learning as much as possible from the deep inelastic scattering experiments. This report presents the most recent measurements of Standard Model physics from the H1 experiment, emphasizing new techniques based on deep...
The incoming solar radiation and heating depend on the solar activity (SA), which undergoes cyclic changes with a period of about 11 years. Variability in solar ultraviolet (UV) radiation influences stratospheric dynamics through photochemical and radiative processes. Changes in the SA can affect the temperature and circulation, changing the conditions for the propagation and reflection of...
The EXO-Restart project at Sofia University aims to detect and dynamically characterize multi-planetary systems using various methods, including transit, radial velocities (RVs), and transit timing variations (TTVs). Studying the dynamical architecture of multiple-planet systems is vital since it reveals information about their formation mechanism and evolution. To gain deeper insights into...
This study investigates the potential correlation between long-term indoor radon concentration changes and moderate seismicity (Mw ≥ 4.0) in Albania. Radon measurements conducted during three independent campaigns (1999–2000, 2014, and 2022) were analyzed at repeated sites to assess temporal variations, and were matched with seismic events within a 50 km radius and within a 0.2-year temporal...
Sb₂Se₃ (antimony selenide) thin films are gaining attention for their potential in thin-film solar cells due to their favorable optoelectronic properties, including a suitable bandgap (~1-1.5 eV), high absorption coefficient, and relatively low toxicity compared to other materials like CdTe and CIGS. Antimony selenide compound exhibits a unique quasi-one-dimensional structure with chains of...
Abstract
In recent years, research on microplastics in rivers has undergone rapid expansion, resulting in the revelation of widespread contamination and the subsequent emergence of concerns regarding ecological and human health impacts. A multitude of studies have confirmed the presence of microplastics in European rivers, with microplastic density demonstrating seasonal variations. The...
Nenad Dj. Lazarov
Department of Theoretical Physics and Condensed Matter Physics (020), Institute of Nuclear Sciences Vinča-National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia.
Email:lazarov@vinca.rs
ORCID ID Nenad Dj. Lazarov is: 0000-0003-3173-9636
Abstract. This paper will consider the behavior of the velocity obtained from...
Radon (²²²Rn) is a carcinogenic, inert noble gas that is undetectable indoors by human senses due to its odorless, colorless, tasteless, and silent nature.
This study aims to (1) measure the Indoor Radon Concentration (IRC) in 840 Mosque-Minarets (MMs) across Muğla Province (13 districts) in Southwestern Turkey, (2) examine the relationship between IRC and Soil Radon Concentration (SRC) in...
