bluuebunny/crossref_metadata_2025 huggingface dataset:
O deleite da compaixão segundo Friedrich Schiller
Authors: Veiga Felipe Motta
Published: May 2024

O presente artigo se detém sobre um texto do poeta, dramaturgo e teórico alemão Friedrich Schiller, intitulado Sobre a arte trágica, a fim de destrinchar a concepção schilleriana do deleite da compaixão, isto é, o deleite que os seres humanos experimentam ao testemunhar o sofrimento alheio. Segundo o autor, provocar esse tipo de deleite é o fim supremo das representações trágicas. Para compreender melhor o pensamento de Schiller a esse respeito, recorremos também a outros textos escritos por ele na mesma época (a última década do século XVIII) e no mesmo veículo de imprensa (a revista Neue Thalia), bem como ao principal livro que inspirou as reflexões que constam em Sobre a arte trágica, a Poética de Aristóteles.
A tortura do olhar no inferno de Sartre: a função do outro na peça "Huis Clos"
Authors: Deus Flávio Rocha de
Published: May 2024

Na peça Huis Clos (Entre quatro paredes), acompanhamos três personagens: Garcin, Inès e Estelle, que são trancados juntos em uma sala após suas mortes. À espera de enxofre, fogo e tortura física no além-vida, surpreendem-se ao notar que o suposto inferno é, na verdade, a simples convivência constante com o outro. Neste cenário, por meio de uma análise das características desse inferno criado por Sartre, buscamos entender questões caras para a filosofia do autor, em especial o papel do olhar enquanto instrumento de reconhecimento e as dimensões conflituosas da existência do outro.
Notes on the distribution, food plants and morphology of Chlorophanus C. R. Sahlberg, 1823 species (Coleoptera: Curculionidae) in Turkey
Authors: GÜLTEKİN NESLİHAN , ISMAILOVA MADINA Sh. , GÜLTEKİN LEVENT , KOROTYAEV BORIS A. , YUNAKOV NIKOLAI
Published: May 2024

Chlorophanus vittatus Schoenherr, 1832, known from the Caucasus and northern Iran, is here newly reported from eastern Turkey. Salix L., Populus L., Tamarix L. and Glycyrrhiza glabra L. are revealed as host plants of adults in Turkey. Feeding and mating behavior of adults were observed on leaves of G. glabra during the summer period in the Aras River valley. The lectotype of Ch. vittatus is designated, description and digital photographs of the genitalia are presented based on newly collected material. Distributional data for Ch. vittatus, Ch. excisus (Fabricius, 1801) and Ch. pollinosus (Fabricius, 1792) in Turkey are reported, the latter species is also recorded from Turkey for the first time. Chlorophanus flavescens (Fabricius, 1787) is deleted from the list of the Iranian fauna, and Ch. excisus, from the list of the Russian fauna. Characteristic ecological and distributional features of the genus Chlorophanus C. R. Sahlberg, 1823 are discussed, and notes on the riparian habitats in Turkey are given to attract attention to the necessity of their preservation. As a fragile member of the riparian insect species complex, a weevil, Corimalia aliena (Faust, 1890), formerly known only from Central Palaearctic, is reported for the first time from Turkey where it was found on Myricaria sp. in Erzurum Province. Chlorophanus excisus co-occurs with Ch. vittatus in eastern Turkey and western Iran, or at least their ranges overlap there. These two species contribute to the maximum local Chlorophanus diversity in Erzincan and Erzurum provinces. Chlorophanus micans is recorded in Crimean Mountains and Southern Bug River valley indicating a potential current contact between Ch. micans and Ch. pollinosus in Podolian Upland.
Focal incidental colorectal fluorodeoxyglucose uptake: Should it be spotlighted?
Authors: Lee Haejun , Hwang Kyung-Hoon
Published: May 2024

Fluorine-18 fluorodeoxyglucose (F-18 FDG) positron emission tomography/computed tomography (PET/CT) has emerged as a cornerstone in cancer evaluation imaging, with a well-established history spanning several years. This imaging modality, encompassing the examination of the body from the base of the skull to the upper thighs, comprehensively covers the chest and abdominopelvic regions in a singular scan, allowing for a holistic assessment of nearly the entire body, including areas of marginal interest. The inherent advantage of this expansive scan range lies in its potential to unveil unexpected incidental abnormal hypermetabolic areas. The identification of incidental focal FDG uptake within colorectal regions during PET/CT scans is not an uncommon occurrence, albeit fraught with challenges associated with non-specific FDG uptake. The presence of benign colorectal lesions or physiological uptake poses a particular obstacle, as these may manifest with FDG uptake levels that mimic malignancy. Consequently, physicians are confronted with a diagnostic dilemma when encountering abnormal FDG uptake in unexpected colorectal areas. Existing studies have presented divergent results concerning these uptakes. Standardized uptake value and its derivatives have served as pivotal metrics in quantifying FDG uptake in PET images. In this article, we aim to succinctly explore the distinctive characteristics of FDG, delve into imaging findings, and elucidate the clinical significance of incidental focal colorectal uptake. This discussion aims to contribute valuable insights into the nuanced interpretation of such findings, fostering a comprehensive understanding.
Machine learning-based comparison of factors influencing estimated glomerular filtration rate in Chinese women with or without non-alcoholic fatty liver
Authors: Chen I-Chien , Chou Lin-Ju , Huang Shih-Chen , Chu Ta-Wei , Lee Shang-Sen
Published: May 2024

BACKGROUND

The prevalence of non-alcoholic fatty liver (NAFLD) has increased recently. Subjects with NAFLD are known to have higher chance for renal function impairment. Many past studies used traditional multiple linear regression (MLR) to identify risk factors for decreased estimated glomerular filtration rate (eGFR). However, medical research is increasingly relying on emerging machine learning (Mach-L) methods. The present study enrolled healthy women to identify factors affecting eGFR in subjects with and without NAFLD (NAFLD+, NAFLD-) and to rank their importance.

AIM

To uses three different Mach-L methods to identify key impact factors for eGFR in healthy women with and without NAFLD.

METHODS

A total of 65535 healthy female study participants were enrolled from the Taiwan MJ cohort, accounting for 32 independent variables including demographic, biochemistry and lifestyle parameters (independent variables), while eGFR was used as the dependent variable. Aside from MLR, three Mach-L methods were applied, including stochastic gradient boosting, eXtreme gradient boosting and elastic net. Errors of estimation were used to define method accuracy, where smaller degree of error indicated better model performance.

RESULTS

Income, albumin, eGFR, High density lipoprotein-Cholesterol, phosphorus, forced expiratory volume in one second (FEV1), and sleep time were all lower in the NAFLD+ group, while other factors were all significantly higher except for smoking area. Mach-L had lower estimation errors, thus outperforming MLR. In Model 1, age, uric acid (UA), FEV1, plasma calcium level (Ca), plasma albumin level (Alb) and T-bilirubin were the most important factors in the NAFLD+ group, as opposed to age, UA, FEV1, Alb, lactic dehydrogenase (LDH) and Ca for the NAFLD- group. Given the importance percentage was much higher than the 2nd important factor, we built Model 2 by removing age.

CONCLUSION

The eGFR were lower in the NAFLD+ group compared to the NAFLD- group, with age being was the most important impact factor in both groups of healthy Chinese women, followed by LDH, UA, FEV1 and Alb. However, for the NAFLD- group, TSH and SBP were the 5th and 6th most important factors, as opposed to Ca and BF in the NAFLD+ group.
Efficacy and safety of carrimycin in ten patients with severe pneumonia following solid organ transplantation
Authors: Cui Xian-Quan , Zhang Lu-Wei , Zhao Peng , Feng Jing-Jing
Published: May 2024

BACKGROUND

The number of patients undergoing solid organ transplantation has increased annually. However, infections in solid organ transplant recipients can have a severe effect on patient survival owing to the continued use of immunosuppressants. Carrimycin is a novel macrolide antibiotic produced by genetically engineered streptomyces spiramyceticus harboring a 4’’-O-isovaleryltransferase gene (ist) from streptomyces thermotoleran. Carrimycin has good antibacterial and antiviral effects. However, no relevant studies have been conducted on the efficacy and safety of carrimycin in patients with severe pneumonia (SP) after solid organ transplantation.

AIM

To explore the efficacy and safety of carrimycin in patients with SP after solid organ transplantation to provide a medication reference for clinical treatment.

METHODS

In March 2022, ten patients with SP following solid-organ transplantation were treated at our hospital between January 2021 and March 2022. When the condition was critical and difficult to control with other drugs, carrimycin was administered. These ten patients' clinical features and treatment protocols were retrospectively analyzed, and the efficacy and safety of carrimycin for treating SP following solid organ transplantation were evaluated.

RESULTS

All ten patients were included in the analysis. Regarding etiological agent detection, there were three cases of fungal pneumonia, two cases of bacterial pneumonia, two cases of Pneumocystis pneumonia, and three cases of mixed infections. After treatment with carrimycin, the disease in seven patients significantly improved, the course of the disease was significantly shortened, fever was quickly controlled, chest computed tomography was significantly improved, and oxygenation was significantly improved. Finally, the patients were discharged after curing. One patient died of acute respiratory distress syndrome, and two patients discontinued treatment.

CONCLUSION

Carrimycin is a safe and effective treatment modality for SP following solid organ transplantation. Carrimycin may have antibacterial and antiviral effects in patients with SP following solid organ transplantation.
Primary Ewing sarcoma of the kidney mimicking cystic papillary renal cell carcinoma in an older patient: A case report
Authors: Kim Suhong , Park Jongsoo , Ko Young Hwii , Kwon Hee Jung
Published: May 2024

BACKGROUND

Ewing’s sarcoma (ES) is a neuroectodermal tumor that typically occurs in the bones and soft tissues of children and young adults. Primary renal ES is rare; only a few cases and a small case series have been documented, and only four cases involved primary renal ES in older people (> 65 years old).

CASE SUMMARY

Herein, we describe the radiological and pathological features of primary renal ES in an older person. A 76-year-old man complained of poor oral intake and was found to have a large cystic renal mass with indistinct margins on computed tomography. Ultrasound-guided biopsy revealed that the tumor contained small round blue cells. The patient underwent a right radical nephrectomy. The tumor cells showed diffuse membranous CD99, and nuclear friend leukemia integration 1 transcription factor and NK2 Homeobox 2. Fluorescence in situ hybridization revealed EWSR1 translocation. Postoperatively, 18F-fluorodeoxyglucose positron emission tomography revealed no evidence of metastasis. The patient was diagnosed with primary renal ES. Six months following the surgery, local recurrence and distant metastasis were observed. Primary renal ES is rare and often lethal in older individuals. The specific imaging findings are unknown, and treatment protocols have not been standardized.

CONCLUSION

This case report describes the radiological and pathological features of primary renal ES in an older person.
Imaging characteristics and treatment strategies for carotid artery occlusion caused by skull base fracture: Three case reports
Authors: Shangguan Pei-Xin , Zhou Ke-Chun
Published: May 2024

BACKGROUND

Traumatic internal carotid artery (ICA) occlusion is a rare complication of skull base fractures, characterized by high mortality and disability rates, and poor prognosis. Therefore, timely discovery and correct management are crucial for saving the lives of such patients and improving their prognosis. This article retrospectively analyzed the imaging and clinical data of three patients, to explore the imaging characteristics and treatment strategies for carotid artery occlusion, combined with severe skull base fractures.

CASE SUMMARY

This case included three patients, all male, aged 21, 63, and 16 years. They underwent plain film skull computed tomography (CT) examination at the onset of their illnesses, which revealed fractures at the bases of their skulls. Ultimately, these cases were definitively diagnosed through CT angiography (CTA) examinations. The first patient did not receive surgical treatment, only anticoagulation therapy, and recovered smoothly with no residual limb dysfunction (Case 1). The other two patients both developed intracranial hypertension and underwent decompressive craniectomy. One of these patients had high intracranial pressure and significant brain swelling postoperatively, leading the family to choose to take him home (Case 2). The other patient also underwent decompressive craniectomy and recovered well postoperatively with only mild limb motor dysfunction (Case 3). We retrieved literature from PubMed on skull base fractures causing ICA occlusion to determine the imaging characteristics and treatment strategies for this type of disease.

CONCLUSION

For patients with cranial trauma combined with skull base fractures, it is essential to complete a CTA examination as soon as possible, to screen for blunt cerebrovascular injury.
Bayesian Network Approach for Studying the Operational Reliability and Remaining Useful Life
Authors: Jana Debasis , Kumar Deepak , Gupta Suprakash , Pal Sukomal , Ghosh Sandip
Published: May 2024

Reliability study plays a significant role in supporting the operation of any machinery working in a dynamic and harsh environment such as mining, and construction industries. This quality is inherently uncertain and a stochastic variable of any system. This study focused on the effects of operating conditions (OCs) on the operational reliability and remaining useful life (RUL) of machinery. A probabilistic graphical method called Bayesian Network (BN) was used to study the effect of OCs on the system performance. The developed methodology has been demonstrated by analyzing the operational reliability and predicting the RUL of electrical motors operated in heavy mining machinery. The failure probabilities estimated from the historical data of the motor system are failure likelihood, and OCs are the evidence in the developed BN model. It has been observed that the performance and RUL of the motor are significantly influenced by OCs and maintenance. A threshold value of reliability at which the motor system requires maintenance or replacement has been proposed to guide management in decision-making. This study will be beneficial for designing an appropriate maintenance schedule, reducing unplanned production downtime, and reducing the maintenance cost of electrical motors operated particularly in dynamic and harsh environmental industries.
Inventing Tradition in Bhaktapur, Nepal: The Trajectories of Lime in Heritage Reconstruction
Authors: Arora Vanicka , Murthy Manas
Published: May 2024

Abstract: In this paper, we trace the evolution of discourse, policy, and practice that have legitimized lime as a "traditional" building material in ongoing heritage reconstruction in Bhaktapur, Nepal, following the 2015 Gorkha Earthquake. While historically much of Bhaktapur's architectural fabric has used brick and timber as structural systems along with mud-(or clay-)based mortars and finishes, lime-based mortars and plasters have become ubiquitous as a material for heritage reconstruction. The benefits of lime over mud in terms of material strength are cited as one reason. Diminishing sources for mud are attributed as another reason, even as lime is imported extensively from neighboring countries such as India. Local contractors, officials, and laborers describe lime as a traditional building material, even though it was introduced as mortar relatively recently by UNESCO consultants working in the Kathmandu Valley in the 1970s and 1980s. In this paper we examine the materialities of lime and the narratives around its strength and seismic performance that contribute to its popularity. We analyze the ways in which lime as a material for heritage reconstruction gets simultaneously classified as traditional and modern, local and global, through a brief historiography of its use in Kathmandu Valley and by engaging with specific case studies in the Bhaktapur Durbar Square, which is a UNESCO World Heritage Site.
More Than Urban Mining: Salvaging Modern Material Discards for Meaningful Reuse
Authors: Ross Susan
Published: May 2024

Abstract: As redevelopment of already built-up sites expands in North American cities, tearing down large modern buildings is also accelerating. In pursuit of circular economy and sustainable building ideals, traditional practices like deconstruction for salvage and reuse are being revived. However, a shift toward valuing existing buildings as material banks, as implied in the rise of "urban mining," challenges established material heritage values. Attempts to salvage and reuse modern materials and assemblies raise specific issues, notably the perceived obsolescence of industrial materials and modern buildings and the complex and difficult values of hazardous or experimental elements. In some cases, reinventing modern materials with new uses in new places will expand or reframe heritage values while helping us learn how to address their challenges as objects of materials conservation. To evaluate current practices, this paper discusses selected examples from Ottawa's postwar urban landscape, each of which illustrates the range of issues for alternatives to demolition. Specific opportunities for modern heritage include reorienting salvage efforts to the scale of the component and redefining materials reuse as a critique of modernist models of obsolescence and materials waste.
From Local to Global: Reconsidering Material Experience in the Age of Global Regionalism
Authors: Guitart Miguel
Published: May 2024

Abstract: Global design tends to simplify and homogenize the discourse of architectural practice. Global practices typically avoid concrete solutions addressing the specific needs of the local. Global production is concerned with solving not a single problem but the same problem at high volume. Global design leads to an estrangement of local tradition and material history, delivering unfitting contextual insertions that progressively impoverish local memory in material, cultural, and ultimately, social terms. The global is not context antagonistic; it is acontextual by definition, because its concerns are related to abstract systems of economic value and the demands of industrial production. Conversely, the local celebrates the idiosyncrasies that relate to a specific location. Local architectural strategies promote a connection between material work and sensory experience, providing an architectural framework for the collective memory that avoids compromising contextual responses with uprooted designs. The tactile experience of materials over time contributes to construct the memory of places, ultimately building up its identity. Material memory opposes the homogenizing and alienating dimension of generic global design. The associations between material perception and collective memory facilitate a foundation for contemporary architectural production through sensory experience, while incorporating regional idiosyncrasies that embody contextual continuities. The connections between material memory and tactility can in fact reveal pathways to productive models of responsible globalism. The qualities embodied in the material memory of a place speak to a common history that embodies the very traces of how and why a place is what it is. Material memory and the direct experience of tactility oppose many of the homogenizing and alienating conditions of generic global design, providing a model that provides continuity between the local and the global, between past and future. This essay reflects on local techniques and material tactility as a potential path to grounding interventions that oppose the homogenizing discourses implemented by global trends. In proposing a model based on Global Regionalism, materials are considered the canvas upon which the intimacy of contextual traces connects memory with innovation, incorporating experience and tradition into the global mainstream.
Trauma and Unaccompanied Child Migration in US History: Reflections from the Archives
Authors: Bradford Anita Casavantes
Published: May 2024

Abstract: Through detailed analysis of archival records, Anita Casavantes Bradford traces the history of the clinical, academic, and popular understandings of trauma as it influenced US immigration policy for unaccompanied migrant children during the twentieth century. She questions why adults charged with the care of unaccompanied minors have "(mis)understood … (mis)managed … and (mis)represented" children as traumatized, both unintentionally and deliberately, in order to advance adult objectives. Casavantes Bradford provides a historical overview of US immigration and refugee polices since the 1930s as applied to unaccompanied migrant children. This history also traces the evolution of clinical and popular definitions of trauma and post-traumatic stress disorder (PTSD)—officially recognized by psychologists in 1980—and suggests that policies for managing and mitigating trauma among unaccompanied minors often led to negative consequences. These polices, above all, were often based on geopolitical and domestic political considerations rather than the welfare of children, according to Casavantes Bradford. Thus, during the 1980s, unaccompanied minors from Haiti and Central America reaching the United States faced detention and deportation, while Sudanese "lost boys" were granted preferential treatment that aligned with US national security interests in Africa. Since the 1930s, markers of difference such as race, class, and religion have also played fundamental roles in which unaccompanied minors have been given the "right to be traumatized" and resettlement. Casavantes Bradford cautions researchers against interpreting migrant children's experiences through biased or ahistorical notions of trauma that oversimplify individual young people's experiences and their potential resilience. Historians and others should critically examine their own assumptions when studying trauma and the experiences of unaccompanied migrant children.
HIST 328/6: Eurasian Nomads and Nomadism between Empire and Nation (A History of Managing Diversity)
Authors: Biyashev Ismael
Published: May 2024

SUMMARY: Opening the series “New Curricula for New Histories of Northern Eurasia,” Ismael Biyashev publishes the syllabus of his course “Eurasian Nomads and Nomadism between Empire and Nation (A History of Managing Diversity).” The course presents nomads as a complex and historically evolving phenomenon that cannot be conceptualized as a stable “thing” beyond specific historical circumstances and intergroup relations. Резюме: Открывая серию “Новые университетские курсы по новой истории Северной Евразии”, Исмаил Бияшев публикует программу своего курса “Евразийские кочевники и кочевничество между империей и нацией (история управления разнообразием)”. Курс представляет кочевников как сложное и исторически развивающееся явление, которое нельзя описать как статичную “вещь” – вне конкретных исторических обсто-ятельств и межгрупповых отношений.
Regional Innovation and Economic Transformation
Authors: Singh Vijai J , Allen Thomas
Published: May 2024

Abstract: An important aspect of globalization is the role of science and technology whereby nations and regions exhibit their capacity for scientific and technological innovations. Even though ideas, knowledge and expertise have no borders, some areas are better positioned to embark on scientific discovery and innovation than others. Even though production of scientific knowledge in one area ultimately spills over in another, differences are likely to continue. Scientists, engineers, and entrepreneurs are highly mobile professionals who move easily beyond local and regional economic opportunities. These experts appear to prefer to locate in areas with sound scientific research and innovation infrastructure on the one hand and intellectual and scientific brain power on the other.
High harmonic generation with femtosecond drivers: MPC vs OPCPA
Authors: Manschwetus Bastian , Shumakova Valentina , Autuori Alice , Braatz Thomas , Starosielec Sebastian , Goudarzi Hossein , Heyl Christoph M. , Prandolini Mark J. , Buss Heye , Schulz Michael , Riedel Robert
Published: May 2024

We compare the spectral flux of a high harmonic source for two driver systems using similar pulse parameters but different central wavelength: a multipass cell compressed Yb laser and an optical parametric amplifier system.
Laser Systems and Diagnostics for the ASU Compact X-ray Source
Authors: Tilton Sean , Eckrosh Kevin , Larsen Rae , Ros Elena , Lee Hyung Seo , Valentin Dariannette , Adamo Emmanuel , Sandhu Arvinder , Banerjee Sudeep , Kaindl Robert , Holl Mark R. , Klingebiel Sandro , Metzger Thomas , Holl Mark R. , Graves William S. , Teitelbaum Samuel W.
Published: May 2024

We present recent commissioning results from the ASU Compact x-ray source (CXLS)- an inverse Compton source producing sub-picosecond hard x-rays. We discuss the x-ray source performance, flux, diagnostics, and designs for a future ICS source.
X-Ray and Electron Beam Considerations for Laser-Compton Image-Guided Radiation Therapy
Authors: Effarah Haytham H. , Reutershan Trevor , Nelson Eric C. , Hwang Yoonwoo , Barty Christopher P. J.
Published: May 2024

Electron beams used in laser-Compton X-ray sources can be utilized as ultra-high dose rate (UHDR) ionizing radiation sources if the architecture provides sufficient peak current and beam energy. Using a multi-step simulation workflow, we identify commensurate X-ray and electron beam profiles for image-guided UHDR (FLASH) radiotherapy experiments.
Highly Efficient 13.5 nm Light Generation Using 2 μm Laser Driven Tin Plasma
Authors: Mostafa Y. , Behnke L. , Engels D. J. , Bouza Z. , Sheil J. , Ubachs W. , Versolato O. O.
Published: May 2024

We demonstrate highly efficient 2 μm-wavelength laser-produced plasma light sources for nanolithographic applications, reaching efficiencies of up to 5%.
Single-shot spatial coherence studies of plasma based X-ray laser
Authors: Albrecht M. , Hort O. , Kozlová M. , Krůs M. , Nejdl J.
Published: May 2024

We present a single-shot method of spatial coherence measurement based on the evaluation of the far-field diffraction pattern from a specially designed 1D and 2D binary masks. The method was demonstrated using a plasma-based Zn X-ray laser.
Atomic/Ion Velocity Measurements Using Isotopic Resonant Transitions Stimulated by Laser-Compton Radiation
Authors: Reutershan Trevor , Mettler Jennifer , Nelson Eric C. , Barty C.P.J.
Published: May 2024

The intensity of nuclear resonant transitions is largely dominated by atomic motion. Laser-Compton sources have the capability to measure these Doppler spectrum shifts and a method of atomic velocity measurements is presented.
Nonlinear Optics of Complex Spatio-Temporal Pulses
Authors: Helle Michael H.
Published: May 2024

We will discuss ongoing research examining nonlinear optics of complex spatio-temporal pulses. Numerical results as well as a method to adaptively generate such pulses using a fully programmable laser field shaping technique will be presented.
Comparison of pulse duration measurement techniques in the few-cycle regime
Authors: Pajer Viktor , Bohus János , Lehotai Levente , Kalashnikov Mikhail , Seres Imre , Gilicze Barnabás , Kiss Bálint , Börzsönyi Ádám , Varjú Katalin , Szabó Gábor , Nagymihály Roland
Published: May 2024

We measured the duration of few-cycle pulses with different characterization techniques (d-scan, SRSI and TIPTOE) at four post-compression stages. We compared the retrieved temporal shapes, spectra and phases to see their reliability and limitations.
High Energy Picosecond laser for ICS X-ray source
Authors: Courjaud Antoine , Brisset Jean-Gabriel , Pallas Florent , Jacob Côme , Gontier Emilien , Pagliusi Pasquale , Agostino Raffaelle
Published: May 2024

We report a Yb laser delivering 500mJ at 100Hz repetition rate and 5ps pulse duration, fully synchronized to an accelerator in order to generate X-rays ranging from 17 to 350keV through Inverse Compton Scattering.
Attosecond X-ray absorption spectroscopy of ionic dynamics induced by strong field ionization
Authors: Zhang Qian , Zhao Jing , Wang Xiaowei , liu Jinlei , Zhao Zengxiu
Published: May 2024

Real-time observation of electronic dynamics in ionic molecules induced by strong-field ionization (SFI) is essential for understanding the photoinduced chemical reactions and physical processes. The advent of ultrafast X-ray spectroscopy has opened new avenues for directly probing the electronic and nuclear dynamics in ions [1,2]. In a recent experiment [3], the population distribution of electronic states in air lasing of nitrogen ion was measured for the first time. Here we establish a theoretical approach to simulate the ionic dynamics, which simultaneously addresses strong-field ionization of the neutral molecules and electronic-vibrational coupled dynamics of the ions. We successfully reproduced the X-ray transient absorption spectra (XAS) of nitrogen ion observed in the experiment. By separating the contributions of different electronic states, our study revealed the important role of nuclear vibrational motion in strong-field induced non-equilibrium dynamics. It is found that the electronic population distributions strongly depend on the alignment angle of the molecular axis relative to the laser polarization. With the time-integrated XAS, we achieve the vibrational-resolved measurement of electronic state populations. The modulation of the absorbance with the time delay originates from the vibrational dynamics. Our work sheds light on ultrafast probing of ionic dynamics under strong laser field.
Resolving the tensor components for low-symmetry, polar class 3 nonlinear optical crystals: example of BaGa2GeS6
Authors: Kato Kiyoshi , Umemura Nobuhiro , Miyata Kentaro , Petrov Valentin
Published: May 2024

The magnitude and sign of the nonlinear coefficients of the trigonal BaGa2GeS6 are determined by second-harmonic and sum-frequency generation, rendering it a viable alternative to AgGaS2 for 1-μm pumped frequency down-conversion to the mid-IR.
Two-photon polymerization 3D printed microstructures as a platform for high-energy laser-driven ion accelerators
Authors: Tochitsky S. Ya. , Lemos N. , Simpson R. A. , Grace E.S. , Pak A. , Ma T. , Fiuza F. , Haberberger D.J. , Haid A. , Gerbsch K. , Joshi C.
Published: May 2024

We present the results on ion acceleration in 3D printed wire structures irradiated by PW laser pulses. Above 100 MeV proton and 500 MeV carbon beams are reported in 10-20 μm thick microstructures.
Isolated 64-attosecond pulses driven by a postcompressed Yb-laser
Authors: Chien Yu-En , Tsai Ming-Shian , Liang An-Yuan , Chen Ming-Chang
Published: May 2024

For the first time, an isolated attosecond pulse is directly generated from the Yb-laser. Intense post-compressed 3.5-fs pulses at 1030 nm were focused into a gas cell filled with neon, resulting in the generation of isolated 64-as pulses, which were characterized by attosecond streaking.
The Apollon laser facility upgrade to the multi-PW level
Authors: Papadopoulos D. N. , Ayoul Y. , Beluze A. , Gobert F. , Mataja D. , Fréneaux A. , Lebas N. , Chabanis M. , Dumergue M. , Audebert P. , Mathieu F.
Published: May 2024

The Apollon laser facility has recently increased its peak power capacity to the 3.7 PW level. In this presentation we discuss the commissioning of the laser system and provide feedback from the first experimental campaigns.
A Single-Stage Dispersion-Controlled Multi-Pass Cell Setup to Efficiently Drive Resonant Dispersive Wave Emission
Authors: Pratolli Lorenzo , Silletti Laura , Grigorova Teodora F. , Brahms Christian , Wahid Ammar bin , Escoto Esmerando , Balla Prannay , Rajhans Supriya , Horn Katinka , Winkelmann Lutz , Wanie Vincent , Trabattoni Andrea , Heyl Christoph M. , Travers John C. , Calegari Francesca
Published: May 2024

An Ytterbium laser is compressed to sub-20fs by a single-stage multi-pass cell and used to produce tunable ultraviolet resonant dispersive wave (RDW) emission in a hollow-core fibre at 50kHz repetition rate and 12.5W average power.
High-brightness 100-kHz source of ultrashort pulses tunable in 200-1050 nm spectral range
Authors: Shumakova Valentina , Braatz Thomas , Maindment Luke , Autuori Alice , Manschwetus Bastian , Merkl Philipp , Goudarzi Hossein , Starosielec Sebastian , Prandolini Mark , Schulz Michael , Riedel Robert , Buss Jan Heye
Published: May 2024

We present a multi-channel 100-kHz tunable table-top laser source of sub-50 fs pulses, based on an optical parametric chirped pulse amplification (OPCPA) and a multi-pass cell (MPC) post-compression technologies.
A Compact Beamline for High-Throughput, Multiscale, Ultrafast Extreme Ultraviolet Ptychography
Authors: Grova Carmelo , Bevis Charles S. , Giani Nicola , Adams Daniel E. , Svetina Cristian , Mancini Giulia F.
Published: May 2024

We report the design of a tabletop beamline for Ultrafast Ptychographic Imaging capable of supporting full-field quantitative reconstructions with near-wavelength spatial resolution and sub-50fs temporal resolution.
Generation of high-order harmonic spatiotemporal optical vortices
Authors: Martín-Hernández Rodrigo , Gui Guan , Plaja Luis , Kapteyn Henry K. , Murnane Margaret M. , Porras Miguel A. , Liao Chen-Ting , Hernández-García Carlos
Published: May 2024

We theoretically and experimentally demonstrate the generation of high-topological charge, extreme-ultraviolet (EUV) spatiotemporal optical vortices (STOV) from high-order harmonic generation. EUV-STOVs are unique structured light tools for exploring ultrafast topological laser-matter interactions.
Single-shot based background-free mid-infrared spectroscopy using upconversion of sub-cycle pulses
Authors: Cabello Neil Irvin , Ozawa Shinta , Zhao Yue , Fuji Takao
Published: May 2024

We have successfully demonstrated highly sensitive broadband mid-infrared spectroscopy using sub-cycle pulses generated through filamentation. Single-shot based and background-free measurement of absorption spectra was achieved by upconversion of the sub-cycle mid-infrared pulses.
Mid-infrared Photothermal Lens Spectroscopy of Liquids Using an External Cavity Quantum Cascade Laser
Authors: Lukasievicz Gustavo V. B. , Sehn Elizandra , Dabrowska Alicja , Lindenbauer Leopold , Lendl Bernhard
Published: May 2024

The photothermal lens spectroscopy using a quantum cascade laser was applied to analyze liquid samples. The results show the great potential of this technique for the mid-IR spectroscopic analysis of different liquids and mixtures.
Advanced spectroscopic instruments based on high-brightness mid-infrared lasers
Authors: Zorin Ivan , Gattinger Paul , Brandstetter Markus
Published: May 2024

In the past decade, mid-infrared lasers emerged as cost-effective alternatives for routine infrared spectroscopy, notable for their brightness and coherence. We review advancements in IR spectroscopy techniques tailored for mid-IR supercontinuum sources.
Intensity and phase noise characterization of a Kerr-lens mode-locked Cr:ZnSe laser
Authors: Giannotti D. , Caruso A. , Pisani F. , Canella F. , Laporta P. , Galzerano G.
Published: May 2024

We report on a detailed intensity and phase noise characterization of a Kerr-lens mode-locked Cr:ZnSe laser at 2.4 μm wavelength with 42-fs pulse duration and a frequency stabilized repetition frequency of 215 MHz.
Prospects of Ho3+-Doped Sesquioxide Laser Ceramics for Laser Emission at 3 μm
Authors: Eremeev Kirill , Loiko Pavel , Balabanov Stanislav , Evstropov Timofey , Kosyanov Denis , Filofeev Sergey , Camy Patrice , Braud Alain
Published: May 2024

Ho:R2O3 (R = Y, Lu, Sc) transparent sesquioxide ceramics were fabricated and their mid-infrared emission properties (the 5I6 →5I7 transition) were studied at room- and cryogenic-temperatures with the goal of developing novel materials for 3-μm lasers.
Comparison of GST and Sb2S3 Phase Change Materials for Reconfigurable Integrated Mid-Infrared Supercontinuum Sources
Authors: Perestjuk Marko , Biegański Adam , Chalak Anas , Armand Rémi , Torre Alberto Della , Cueff Sébastien , Mitchell Arnan , Boes Andreas , Hartmann Jean-Michel , Fedeli Jean-Marc , Reboud Vincent , Brianceau Pierre , Monat Christelle , Grillet Christian
Published: May 2024

We characterize the properties of two phase change materials, Ge2Sb2Te5 and Sb2S3, for integrated mid-infrared photonics. Further, we demonstrate that Sb2S3 is suitable for reconfigurable supercontinuum generation as a broadband, coherent and intense light source.
Multicolor-Pulse-Burst-Pumped Long-Wave Infrared NOPCPA
Authors: Jutas Rokas , Roman Joris , Astrauskas Ignas , Imani Aref , Carpeggiani Paolo , Polynkin Pavel , Kaksis Edgar , Floery Tobias , Kolenda Jonas , Bartulevičius Tadas , Michailovas Kirilas , Michailovas Andrejus , Baltuška Andrius , Pugžlys Audrius
Published: May 2024

LWIR pulses are amplified to 80 μJ energy in an angularly multi-beam non-collinearly seeded and non-collinearly pumped OPCPA, the first being pumped by a burst-mode Nd:YAG amplifier. LWIR pulse energies of >10 mJ are targeted.
Power Scalable and Tunable Operation of a Narrow-Band PPLN Non-Resonant Optical Parametric Oscillator
Authors: Chen Weidong , Wang Li , Cui Chen , Zhang Ge , Schirrmacher André , Büttner Edlef , Petrov Valentin
Published: May 2024

The average power of a narrow-band PPLN non-resonant optical parametric oscillator is scaled up to the 10-W level with tuning across 40 nm (signal) and 66 nm (idler) achieved using transversely chirped volume Bragg gratings.
Synchronously-Pumped OPO with Record-High 10.3 W Average Power at 3.1 μm
Authors: Pecile Vito F. , Leskowschek Michael , Modsching Norbert , Wittwer Valentin J. , Südmeyer Thomas , Heckl Oliver H.
Published: May 2024

We investigate power scaling with a signal singly-resonant OPO pumped by a 125 MHz Yb:fiber CPA. We achieve an average power of 10.3 W at 3.1 μm with a free-running power stability of 0.84%.
Metasurface optical trap array for single atoms
Authors: Huang Ruiting , Zhou Feng , Li Xiao , Xu Peng , Wang Yi , Zhan Mingsheng
Published: May 2024

Metasurfaces made of subwavelength silicon nanopillars provide unparalleled capacity to manipulate light, and have emerged as one of the leading platforms for developing integrated photonic devices. In this study, we report on a compact, passive approach based on planar metasurface optics to generate large optical trap arrays. The unique configuration is achieved with a meta-hologram to convert a single incident laser beam into an array of individual beams, followed up with a metalens to form multiple laser foci for single rubidium atom trapping. We experimentally demonstrate two-dimensional arrays of 5 × 5 and 25 × 25 at the wavelength of 830 nm, validating the capability and scalability of our metasurface design. Beam waists ∼1.5 µm, spacings (about 15 µm), and low trap depth variations (8%) of relevance to quantum control for an atomic array are achieved in a robust and efficient fashion. The presented work highlights a compact, stable, and scalable trap array platform well-suitable for Rydberg-state mediated quantum gate operations, which will further facilitate advances in neutral atom quantum computing.
Hertz-linewidth, high-power, frequency-agile photonic integrated E-DBR laser
Authors: Siddharth Anat , Attanasio Alaina , Lihachev Grigory , Wang Rui N. , Qiu Zheru , Kenning Scott , Bhave Sunil A. , Riemensberger Johann , Kippenberg Tobias J.
Published: May 2024

We demonstrate hybrid integration of an RSOA with an extended-distributed Bragg reflector (E-DBR) laser cavity implemented on a Si3N4 chip with monolithically in-tegrated piezoactuators. The laser exhibits intrinsic linewidth of 4 Hz with laser frequency tuning over 1.0 GHz at up to 1 MHz triangular chirp rate.
Carrier Frequency Offset Estimation Using Godard Timing Recovery in Coherent Optical Systems
Authors: Nguyen T.-H. , Mumtaz S. , Lorences-Riesgo A. , Sales-Llopis M. , Jauffret C. , Martins C. S. , Wu Z. , Frignac Y. , Charlet G. , Zhao Y.
Published: May 2024

Based on conventional timing recovery (TR) algorithm, we propose a novel method for carrier frequency offset (CFO) estimation by exploiting the available spectrum information from TR. We experimentally validate our proposal in 4-subcarrier 100-GBaud coherent systems.
Accurate SNR Estimation in C+L-band 10-THz Hybrid Raman-EDFA Amplified Transmission Using Two-Stage Power Profile Calculation Accounting for Pump Depletion
Authors: Kimura Kosuke , Shimizu Shimpei , Kobayashi Takayuki , Nakamura Masanori , Miyamoto Yutaka
Published: May 2024

We propose an accurate power profile calculation method for GN-model-based SNR estimation and demonstrate an average SNR estimation error of 0.22 dB in C+L-band 101-ch WDM 96-Gbaud PCS-36QAM signal 1120-km hybrid Raman-EDFA amplified transmission.
Programmable Silicon Photonics for the Implementation of Topological Systems
Authors: Blanco-Redondo Andrea
Published: May 2024

Topological photonics offers a platform to explore both fundamental physics and applications in integrated photonics. In this talk we unveil our latest results on the implementation of topological models in programmable integrated photonic platforms.
Analysis and Mitigation of Unwanted Biases in ML-based QoT Classification Tasks
Authors: Natalino Carlos , Shariati Behnam , Safari Pooyan , Fischer Johannes Karl , Monti Paolo
Published: May 2024

We address the problem of mitigating biases in models used for the quality of transmission prediction. The proposed method reduces the relative accuracy difference between samples with different feature values by up to 45%.
Multi-Span Optical Power Spectrum Prediction using ML-based EDFA Models and Cascaded Learning
Authors: Wang Zehao , Huang Yue-Kai , Han Shaobo , Wang Ting , Kilper Dan , Chen Tingjun
Published: May 2024

We implement a cascaded learning framework using component-level EDFA models for optical power spectrum prediction in multi-span networks, achieving a mean absolute error of 0.17 dB across 6 spans and 12 EDFAs with only one-shot measurement.
Demonstration of Auxiliary Management and Control Channel Transmission and Data-Channel Signal Compensation for Beyond 100G FDM Coherent PON
Authors: Shen Wangwei , Wang Jiaye , Xing Sizhe , Li Guoqiang , Li Zhongya , Yan An , Li Ziwei , Shen Chao , Shi Jianyang , Chi Nan , Zhang Junwen
Published: May 2024

We propose and demonstrate the transmission of AMCC and a novel signal-compensation method for data-channel in coherent FDM-PON. Sensitivity improvement of 6 dB is demonstrated with 150G capacity over 20-km fiber for FDM-PON with AMCC.
Towards polarization insensitive photonic integrated circuits: polarization dependent loss reduction of CMOS-integrated monolithic SiPh components
Authors: Bian Yusheng , Lee Won Suk , Chandran Sujith , Hirokawa Takako , Sorbara Massimo , Aboketaf Abdelsalam , Dezfulian Kevin K. , Najafi Arman , Mosleh Salman , Banihashemian Fahimeh , Sporer Ryan , Zhang Michelle , Song Shenghua , Wong Helen , Ritchie Chris , Lin Yarong , Houghton Thomas , Ding Hanyi , Liu Qidi , Gong Ming , Cho Jae Kyu , Dasgupta Arpan , Chowdhury Zahidur , Barakat Farid , Kim Jason , Tinkler Janet , Lee Jae Gon , Robson Norman , Tang Teck Jung , Anderson Frederick G , Melville Ian , Gifford George , Gupta Vikas , Yu Anthony , Giewont Ken , Letavic Ted
Published: May 2024

We present recent advancements in reducing polarization-dependent-losses (PDLs) for crucial SiPh components. Our link-budget analysis unveils a 1.45dB reduction in total PDL for representative receiver circuits, resulting in a mere 0.38dB TE-TM-path insertion-loss imbalance.
Distributed Acoustic Sensing Over Passive Optical Networks Using Enhanced Scatter Fiber
Authors: Zhu B. , Westbrook P. , Feder K. , Shi Z. , Lu P. , Dyer R. , Sun X. , Li J. , Peterson D. , DiGiovanni D. J.
Published: May 2024

Simultaneous fiber-optic sensing and NG-PON data transmissions over a 1x16 splitter is demonstrated by enhanced scatter fiber. Acoustic signals from a single distribution fiber are identified. The crosstalk between sensing and data channels is studied.
Forward-transmission based distributed fiber sensing compatible with C+L unidirectional communication systems
Authors: Tang Jianwei , Li Xueyang , Cheng Chen , Hao Yaguang , Yang Bang , Li Jiali , He Zhixue , Yang Yanfu , Hu Weisheng
Published: May 2024

We propose forward-transmission based distributed fiber sensing that is compatible with C+L unidirectional communication systems and relaxes the requirement of remote timing synchrony. We demonstrate detection and accurate localization of polarization perturbation utilizing telecom transceivers.
Real-Time Urban Sensing by In-Fiber Interferometric System over Field-Deployed Uncoupled 4-Core Fiber Cable
Authors: Fasano Marco , Hayashi Tetsuya , Nagashima Takuji , Mecozzi Antonio , Antonelli Cristian , Boffi Pierpaolo
Published: May 2024

We demonstrate urban anthropic events monitoring through a sustainable and cost-effective interferometer sensor built by exploiting two cores of an uncoupled 4-core fiber in the first deployed multi-core fiber cable in L’Aquila, Italy.
Trellis Shaping-based Sequence Selection for Inter-datacenter Single-Span Links
Authors: Tang Junyang , Gong Zepeng , Wei PengPeng , Hu Xuemeng , Xiao Xiao , Huang Tianye , Li Xiang
Published: May 2024

We propose trellis shaping technique to implement sequence selection for fiber nonlinearity mitigation in inter-datacenter single-span link. A gain in AIR of 0.2 bits/4D-symbol compared with MB shaping is achieved experimentally over a five-channel 80-km fiber link.
Single-Mode VCSEL with Zn-Diffusion Apertures and Strong Immunity Against Optical Feedback for Improved Data Transmission
Authors: Wu Min-Long , Lin Cheng-Wei , Shi Jin-Wei
Published: May 2024

We demonstrate state-of-the-art performances of single-mode VCSELs, including wide-bandwidth (27GHz), high-power (6.7mW), low-RIN (-137dB/Hz), and invariant 56Gbps eye patterns under strong optical feedback (-6dB). It achieves error-free 46Gbit/sec transmission through 0.5km MMF without using equalizers.
Characterization of Ten-Mode EDFA Using Swept Wavelength Interferometer and Digital Holography
Authors: Huang Yetian , Huang Hanzi , Wu Yan , Chen Haoshuo , Wen Jianxiang , Dallachiesa Lauren , Fontaine Nicolas K. , Guo Cheng , Mazur Mikael , Essiambre René-Jean , Song Yingxiong , Wang Tingyun , Ryf Roland
Published: May 2024

We characterize the spatially and spectrally resolved gain profiles of a ten-mode EDFA over C+L band via Rayleigh backscattering measured by a coherent swept wavelength interferometer. Wavelength-dependent mode-dependent gain is characterized employing digital holography.
Photonic switched networking for data centers and advanced computing systems
Authors: Bakopoulos Paraskevas , Patronas Giannis , Terzenidis Nikos , Wertheimer Zsolt-Alon , Kashinkunti Prethvi , Syrivelis Dimitris , Zahavi Eitan , Capps Louis , Argyris Nikos , Yeager Luke , Bernauer Julie , Mentovich Elad
Published: May 2024

We explore optical switching to extend network programmability to the physical layer. We present applications of our Layer-1 SDN for improving fabric resilience against hardware failures and saving network power and cost in Deep-Learning training.