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  • 2025


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    • Pub. Date : 2025
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  • 2025

    To explore the influencing factors of explosion accidents caused by gasoline leakage in a confined space, the effects of ignition delay time, ignition energy, initial pressure, initial temperature and mass concentration on gasoline vapor explosion pressure and flame propagation velocity were investigated using a 20 L spherical explosion vessel. The dynamic explosion temperature distribution of gasoline vapor was mapped by the colorimetric thermometry, and the results demonstrated that the optimal ignition delay time, ignition energy and mass concentration of gasoline vapor in the confined space were 100 ms, 100 J and 160 g/m3, respectively. When the initial pressure was 0.11 MPa, the deflagration pressure of gasoline vapor explosion reached the maximum of 1.08 MPa. The influence of the increasing initial temperature on the maximum explosion pressure rise rate of gasoline was greater than that on the explosion pressure and combustion duration. When the mass concentration of gasoline vapor was 160 g/m3, the flame propagation velocity and average temperature both obtained their maximum values of 1.23 m/s and 2271 K, respectively. The research results were conductive to reveal the mechanism of explosion accidents caused by gasoline leakage in a confined space, and may provide theoretical guidance for safe storage and transportation of gasoline.
    • Book : (00)
    • Pub. Date : 2025
    • Page : pp.17-17
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  • 2025

    With the advent of high repetition rate laser facilities, novel diagnostic tools compatible with these advanced specifications are required. This paper presents the design of an active gamma-ray spectrometer intended for these high repetition rate experiments, with particular emphasis on functionality within a PW level laser-plasma interaction chamber’s extreme conditions. The spectrometer uses stacked scintillators to accommodate a broad range of gamma-ray energies, demonstrating its adaptability for various experimental setups. In addition, it has been engineered to maintain compactness, electromagnetic pulse resistance, and ISO-5 cleanliness requirements while ensuring high sensitivity. The spectrometer has been tested in real conditions inside the PW-class level interaction chamber at the BELLA center, LBNL. The paper further details the calibration process, which utilizes a 60Co radioactive source, and describes the unfolding technique implemented through a stochastic minimization method.
    • Book : 96(2)
    • Pub. Date : 2025
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  • 2025

    Objectives: The objectives of this study were to (i) determine the prevalence of Haemonchus contortus infections in dairy sheep and goats in continental and insular Greece, based on an abattoir survey, and (ii) to evaluate potential host-related risk factors including the age and sex, as well as the altitude, the management system, the co-existence of goats and sheep, the season, and the anthelmintic treatment, on the occurrence of haemonchosis. Methods: In total, 1004 abomasa of small ruminants were examined to evaluate the prevalence of Haemonchus spp. Moreover, a structured questionnaire was used to obtain relevant information regarding animal and farm characteristics. Haemonchus-like helminths were collected from the abomasa and used for the molecular species identification; a fragment of 321 base pairs of the internal transcribed spacer 2 sequence of nuclear DNA was amplified. Results: The prevalence of mono-species H. contortus infection of small ruminants was 37.2%. For sheep, a multivariable analysis revealed the anthelmintic treatment (treatment with pro/benzimidazoles), the age (lambs under 2 months old), and the management system (intensive management system) as significant factors for preventing H. contortus infection. Likewise, the management system (intensive management system), the anthelmintic treatment (treatment with macrocyclic lactones and their combination with pro/benzimidazoles), the altitude of the farms (farms located over 300 m above sea level), and the season (spring and summer) were significant risk factors in preventing H. contortus infection in goats. Conclusion: These findings emphasize the urgent need for targeted management practices and region-specific veterinary protocols to effectively reduce parasitic burdens.
    • Book : 15(4)
    • Pub. Date : 2025
    • Page : pp.487-487
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  • 2025


    • Book : ()
    • Pub. Date : 2025
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  • 2025


    • Book : ()
    • Pub. Date : 2025
    • Page : pp.1-7
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  • 2025

    Abstract2D materials, including transition metal dichalcogenides, are attractive for a variety of applications in electronics as well as photonics and have recently been envisioned as an appealing platform for phonon polaritonics. However, their direct characterization in the terahertz spectral region, of interest for retrieving, e.g., their phonon response, represents a major challenge, due to the limited sensitivity of typical terahertz spectroscopic tools and the weak interaction of such long‐wavelength radiation with sub‐nanometer systems. In this work, by exploiting an ad‐hoc engineered metallic surface enabling a ten‐thousand‐fold local absorption boost, enhanced terahertz spectroscopy of a monolayer transition metal dichalcogenide (tungsten diselenide) is performed and its dipole‐active phonon resonance features are extracted. In addition, these data are used to obtain the monolayer effective permittivity around its phonon resonance. Via the direct terahertz characterization of the phonon response of such 2D systems, this method opens the path to the rational design of phonon polariton devices exploiting monolayer transition metal dichalcogenides.
    • Book : ()
    • Pub. Date : 2025
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  • 2025

    Background/Objectives: Overexpressed in various solid tumors, the gastrin-releasing peptide receptor (GRPR) is a promising target for cancer diagnosis and therapy. However, the high pancreas uptake of the current clinically evaluated GRPR-targeted radiopharmaceuticals limits their applications. In this study, we replaced the Pro14 residue in our previously reported GRPR-targeted LW02056 and ProBOMB5 with 4,4-difluoroproline (diF-Pro) to obtain an agonist LW02060 (DOTA-Pip-[D-Phe6,Tle10,NMe-His12,diF-Pro14]Bombesin(6–14)) and an antagonist LW02080 (DOTA-Pip-[D-Phe6,NMe-Gly11,Leu13(ψ)diF-Pro14]Bombesin(6–14)), respectively. Methods/Results: The binding affinities (Ki) of Ga-LW02060, Ga-LW02080, Lu-LW02060, and Lu-LW02080 were measured by in vitro competition binding assays using PC-3 cells and were found to be 5.57 ± 2.47, 21.7 ± 6.69, 8.00 ± 2.61, and 32.1 ± 8.14 nM, respectively. The 68Ga- and 177Lu-labeled ligands were obtained in 36–75% decay-corrected radiochemical yields with >95% radiochemical purity. PET imaging, SPECT imaging, and ex vivo biodistribution studies were conducted in PC-3 tumor-bearing mice. Both [68Ga]Ga-LW02060 and [68Ga]Ga-LW02080 enabled clear tumor visualization in PET images at 1 h post-injection (pi). Tumor uptake values of [68Ga]Ga-LW02060 and [68Ga]Ga-LW02080 at 1 h pi were 16.8 ± 2.70 and 7.36 ± 1.33 %ID/g, respectively, while their pancreas uptake values were 3.12 ± 0.89 and 0.38 ± 0.04 %ID/g, respectively. Compared to [177Lu]Lu-LW02080, [177Lu]Lu-LW02060 showed higher tumor uptake at all time points (1, 4, 24, 72, and 120 h pi). However, fast tumor clearance was observed for both [177Lu]Lu-LW02060 and [177Lu]Lu-LW02080. Conclusions: Our data demonstrate that [68Ga]Ga-LW02060 is promising for clinical translation for the detection of GRPR-expressing tumor lesions. However, further optimizations are needed for [177Lu]Lu-LW02060 and [177Lu]Lu-LW02080 to prolong tumor retention for therapeutic applications.
    • Book : 18(2)
    • Pub. Date : 2025
    • Page : pp.234-234
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  • 2025

    Centaurus A (Cen A) is the closest radio galaxy and a prime example of a low-luminosity active galactic nucleus (AGN), exhibiting complex emissions across the electromagnetic spectrum. The nature of its continuum emission, particularly the mechanisms powering it, has been a subject of considerable debate due to the fact that the AGN is deeply buried in dust and therefore not directly observable. This study aims to elucidate the origin of the continuum emission in Cen A and determine the geometrical arrangement of matter in the nuclear region by the mean of optical and near-infrared spectropolarimetry. We obtained spectropolarimetric data of Cen A using the VLT/FORS2, covering the 6100 -- 10300 Å spectral range with an effective resolving power of about 1000. Analysis was conducted on several regions near the obscured AGN, examining total and polarized fluxes, in order to find signatures of the AGN in scattered light. The analysis revealed a region showing strong and narrow emission lines associated with AGN activity. After correction for interstellar polarization in the dust lane (but not for starlight), the intrinsic polarization of the scattered AGN light exhibits a polarization degree of 2 -- 4%, decreasing from optical to near-infrared, associated with a polarization position angle perpendicular to the radio jet axis. We exclude the presence of a hidden broad line in our polarized flux spectrum at ge 99% probability. Narrow emission lines are found to be strongly polarized and orthogonal to the jet position angle. We demonstrate that a beamed synchrotron jet, scattering onto the narrow line region (NLR) best fits all the observational properties reported in this paper and the literature. In this model, the base of the NLR is obscured by a giant (ge 10 pc) circumnuclear region and can only become visible through perpendicular scattering onto the outermost part of the NLR, naturally producing high polarization degrees and polarization angles perpendicular to the radio structure. This study provides strong evidence that Cen A defines a new class of hidden-NLR AGNs in which two other objects naturally find their place (NGC 4258 and 3C 270) and this supports old predictions that beamed synchrotron jets can be observed in reflection. Future surveys should focus on identifying similar hidden-NLR AGNs, especially among misdirected BL Lac AGNs.
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    • Pub. Date : 2025
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  • 2025

    본 논문은 일본 고도성장기(1955~1972)에 제작된 특수촬영 영화 <고질라> 시리즈를 중심으로 괴수를 다루는 영화적 상상력과 전후 일본의 집단적 기억과 정체성 변용과의 관계를 고찰하고 있다. 1954년에 개봉된 영화 《고질라》는 핵실험으로 깨어난 ‘수폭괴수’ 고질라를 통해 전쟁과 피폭의 기억, 그리고 냉전 시대의 폭력적 위협을 알레고리적으로 담아냈다. 이 영화에서 고질라는 일본의 도시를 유린하는 무시무시한 존재로 그려졌으며, 고질라를 물리치며 스스로 목숨을 버린 과학자 세리자와의 자기희생적 결단은 폭력의 연쇄를 거부하는 메시지를 전달하고 있다. 즉, 이 영화는 냉전 시기 미소의 핵 무기 경쟁과 전쟁 위협에 대한 일본인의 불안을 반영하며, 그것에 대한 대안적 담론으로 ‘평화주의’를 강조하고 있다. 그러나 1960년대 이후 <고질라> 영화는 괴수 간의 대결을 중심으로 한 서바이벌 장르로 변화했다. 이 시기의 고질라는 일본을 침략하는 외부 괴수들로부터 도시를 보호하는 수호자 역할을 부여받았으며, 점차 친근하고 귀여운 이미지로 재구성되었다. 이러한 변화는 대중 소비사회의 발전과 관객층의 저연령화에 부응한 상업적 전략의 결과였다. 동시에 이것은 전쟁에 대한 불안이 약해지고 그 결과 평화주의에 대한 강력한 지지가 대세를 형성하는 시대적 분위기 속에서 폭력의 표현에 대한 더 큰 자유를 원하는 심정이 낳은 결과이기도 했다. 특히 고질라는 수폭괴수의 아이덴티티에서 벗어나고 피폭의 기억에서 점차 분리됨으로써 현실적 대응물과 연결되지 않은 소위 시뮬라크르로 변모했다. 본 논문은 이러한 고질라의 변화가 단순히 영화적 트렌드의 변화를 넘어, 전후 일본사회의 기억 재구성과 문화적 정체성의 변화를 상징적으로 보여주는 사건이라고 주장한다. 1950년대 고질라가냉전기 폭력과 전쟁의 기억을 알레고리적으로 드러냈다면, 1960년대 이후의 고질라는 폭력의 유희화를 통해 관객의 흥미를 유도하며 현실과는 분리된 쾌락의 대상이자 유희의 상징이 되었다. 그리고 이런 변용은 냉전의 위협이 편재했던 1950년대를 ‘전후 속 전시’로 타자화하고, 이에 대해 1960년대를 ‘전후 속 전후’로 의미화하는 방식으로 전후라는 시간을 재편하려 했던 당대의 집합적 의지를 배경으로 하고 있었다.
    • Pub. Date : 2025
    • Page : pp.210-243
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