bluuebunny/crossref_metadata_2025 huggingface dataset:
Using Teamwork to Bridge the Adolescent and Young Adult Gap
Authors: Wolfson Julie A. , Bhatia Smita , Bhatia Ravi , Smith Mark W. , Dai Chen , Campbell Sukhkamal B. , Gunn Deidre D. , Mahoney Anne Byrd , Croney Christina M. , Hageman Lindsey , Francisco Liton , Kenzik Kelly M.
Published: October 2022

PURPOSE:

Individuals diagnosed with cancer age between 15 and 39 years (adolescents and young adults [AYAs]) have not seen improvement in survival compared with children or older adults; clinical trial accrual correlates with survival. Unique unmet needs among AYAs related to psychosocial support and fertility preservation (FP) are associated with health-related quality of life.

METHODS:

We enhanced existing structures and leveraged faculty/staff across pediatric/adult oncology to create novel teams focused on AYA (age 15-39 years) care at a single center, with minimal dedicated staff and no change to revenue streams. We aimed to influence domains shown to drive survival and health-related quality of life: clinical trial enrollment, physician/staff collaboration, psychosocial support, and FP. We captured metrics 3 months after patients presented to the institution and compared them before/after Program implementation using descriptive statistics.

RESULTS:

Among 139 AYAs (age 15-39 years) from the pre-Program era (January 2016-February 2019: adult, n = 79; pediatric, n = 60), and 279 from the post-Program era (February 2019-March 2022: adult, n = 215; pediatric, n = 64), there was no change in clinical trial enrollment( P ≥ .3), whereas there was an increase in the proportion of AYAs referred for supportive care and psychology (pediatric: P ≤ .02; adult: P ≤ .001); whose oncologists discussed FP (pediatric: 15% v 52%, P < .0001; adult: 37% v 50%, P = .0004); and undergoing FP consults (pediatric: 8% v39%, P < .0001; adult 23% v 38%, P = .02).

CONCLUSION:

This team-based framework has effected change in most targeted domains. To affect all domains and design optimal interventions, it is crucial to understand patient-level and facility-level barriers/facilitators to FP and clinical trial enrollment.
Converting high-dimensional complex networks to lower-dimensional ones preserving synchronization features
Authors: Naseri Nafise , Parastesh Fatemeh , Ghassemi Farnaz , Jafari Sajad , Schöll Eckehard , Kurths Jürgen
Published: October 2022

Studying the stability of synchronization of coupled oscillators is one of the prominent topics in network science. However, in most cases, the computational cost of complex network analysis is challenging because they consist of a large number of nodes. This study includes overcoming this obstacle by presenting a method for reducing the dimension of a large-scale network, while keeping the complete region of stable synchronization unchanged. To this aim, the first and last non-zero eigenvalues of the Laplacian matrix of a large network are preserved using the eigen-decomposition method and Gram-Schmidt orthogonalization. The method is only applicable to undirected networks and the result is a weighted undirected network with smaller size. The reduction method is studied in a large-scale a small-world network of Sprott-B oscillators. The results show that the trend of the synchronization error is well maintained after node reduction for different coupling schemes.
Sissies, Loafers, and the Feebleminded
Authors: Cartwright Ryan Lee
Published: October 2022

Focusing on rural white communities in the early twentieth century, this article examines how disability, queerness, and economic estrangement were intertwined in American eugenic assessments of the “unfit.” In doing so, it attends to the knotty relations of power by which such communities were simultaneously adjudged deviant and bestowed with the privileges of whiteness. Eugenic family studies supported claims to white superiority by regulating and preventing reproduction among “unfit” rural white communities who might reveal the sham of white supremacy. Yet eugenicists were also concerned about same-sex sexuality and other nonproductive sexualities among the unfit, despite their focus on the “science of better breeding.” This article first analyzes how eugenicists defined a desire for work as the counterpoint to perverse sexual desire. Next, it examines how state institutions used a legal “conduct test” to classify a person as incapable self-support — and therefore feebleminded — on the basis of same-sex sexual relationships, refusal to marry, interdependence, or failure to meet gendered labor norms. Throughout, the article details how eugenic family studies mapped disability, nonproductivity, and nonheteronormativity onto rural landscapes. It concludes by contending that rural queer studies can leverage these landscapes of marginality to think with the racialized city rather than against it.
Ecologies Elsewhere
Authors: Solomon Marisa
Published: October 2022

This article shifts our attention elsewhere, to the places where living is predicated on knowing with, through, and sometimes as waste. Coming out of a larger project detailing the anti-Black geographies of “long-distance” waste management, the author argues that waste infrastructure holds together white property value and produces absented spaces of Black condemnation, the material “fill” to construct white propertied futures. Against white property, the author follows Betty, a Black sex worker in the Tidewater Region of Virginia, who teaches how stealing, swiping, salvaging, telling, and laboring waste are themselves critiques of how property orders earth, and they are ecological modes forged elsewhere. Through the analytics of flyness, becoming fill, and queer Black geometries of relationality, Betty shows us that living as and proximate to waste refracts fugitive articulations of gender on the move. Always moving at the intersection of Blackness as “a waste of space” and becoming waste object herself, Betty's flyness opens an ecological horizon for rethinking the matter that matters.
Mathematical modeling of HIV-HCV co-infection model: Impact of parameters on reproduction number
Authors: Abiodun Oluwakemi E. , Adebimpe Olukayode , Ndako James A. , Oludoun Olajumoke , Aladeitan Benedicta , Adeniyi Michael
Published: October 2022

Background: Hepatitis C Virus (HCV) and Human Immunodeficiency Virus (HIV) are both as classified blood-borne viruses since they are transmitted through contact with contaminated blood. Approximately 1.3 million of the 2.75 million global HIV/HCV carriers inject drugs (PWID). HIV co-infection has a harmful effect on the progression of HCV, resulting in greater rates of HCV persistence after acute infection, higher viral levels, and accelerated progression of liver fibrosis and end-stage liver disease. In this study, we developed and investigated a mathematical model for the dynamical behavior of HIV/AIDS and HCV co-infection, which includes therapy for both diseases, vertical transmission in HIV cases, unawareness and awareness of HIV infection, inefficient HIV treatment follow-up, and efficient condom use.

Methods: Positivity and boundedness of the model under investigation were established using well-known theorems. The equilibria were demonstrated by bringing all differential equations to zero. The associative reproduction numbers for mono-infected and dual-infected models were calculated using the next-generation matrix approach. The local and global stabilities of the models were validated using the linearization and comparison theorem and the negative criterion techniques of bendixson and dulac, respectively.

Results: The growing prevalence of HIV treatment dropout in each compartment of the HIV model led to a reduction in HIV on treatment compartments while other compartments exhibited an increase in populations. In dually infected patients, treating HCV first reduces co-infection reproduction number Rech, which reduces liver cancer risk.

Conclusions: From the model's results, we infer various steps that policymakers could take to reduce the number of mono-infected and co-infected individuals.
(Re)conceptualizing vulnerability in health under the syndemics perspective: protocol for a scoping review
Authors: Hernández Yisel , Pérez Dennis , Molina Yosiel , Peeters Grietens Koen , Nieto-Sánchez Claudia
Published: October 2022

The concept of vulnerability has been widely used in global health research to assess susceptibility to diseases and disasters in individuals and groups. This perspective has proven to be useful for policy making by bringing attention to the unequal distribution of risks and impacts in specific populations and contexts. However, it is often insufficient to explain interactions between environmental, zoonotic, and social realms involved in the experience of health and disease. Theoretical developments proposed under the syndemics approach have intended to explore this gap by studying the underlying political, economic, and social dynamics affecting the occurrence of overlapping health issues. During the coronavirus disease 2019 (COVID-19) pandemic, the term syndemics has been used to refer to underlying conditions and social factors impacting disease outcomes. This scoping review aims to explore the contributions of the syndemics perspective to the (re)conceptualization of vulnerability during the COVID-19 pandemic. We intend to do so by identifying social and environmental arrangements so far described in original research, opinion pieces or reviews published since December 2019. Variations in the explanations provided about the role played by socio-environmental dynamics in the observed interactions in populations, settings, and interacting conditions will be subsequently examined. Finally, we will track the contributions and limitations of the syndemics perspective to the study of vulnerability in health in light of the evidence produced around COVID-19.
Velaroidal Shells and Shells of the Velaroidal Type
Authors: Strashnov Stanislav
Published: October 2022

A group of velaroidal surfaces and surfaces of the velaroidal type belong to the class of "Translation Surfaces". In contrast to the direct translation surfaces, velaroidal surfaces are formed by curves of variable curvature so that the formed surface rests on straight lines of a flat rectangular contour. Only about a dozen velaroidal surfaces have been described and studied in the scientific and technical literature. Velaroidal surfaces are also formed by curves of variable curvature but supported by a flat oval or circular contour. A super ellipse can be taken as a flat contour. The contour may consist of fragments of two identical curves located symmetrically about the axis of symmetry. In Russia velaroidal surfaces are studied so far only in the Peoples' Friendship University of Russia (RUDN University), Moscow. They are popular with both research geometrists and students - architects and builders, who believe that these shapes can be used within parametric, nonlinear, evolutionary and generative architecture. The article provides information with reference to the extensive used bibliographic material on the geometry of known velaroidal surfaces and surfaces of the velaroidal type. Information on the construction and visualization of new velaroidal surfaces with an oval flat contour as a super ellipse, as well as with a frame and a guide super ellipse. The data on determination of the stress-strain state of thin shells with median surfaces in the form of the surfaces under consideration is given. The fields of practical application of velaroidal shells and velaroidal shells are indicated. As shown in the sources used, geometers and calculation engineers have solved almost all the issues related to the design of these shells. Architects use velaroidal shells rarely, mostly to cover industrial buildings. Enclosures of velaroidal type have been used only in draft designs and in diplom works of architecture students.
Demonstration of Common Elements of Involution on a Simple Example
Authors: Umbetov N.
Published: October 2022

The involution of projective rows with a common support, its geometric interpretation are considered. Taking the special case of the geometric interpretation of involution, the problem of constructing harmonically conjugate points is solved for given initial conditions, when one circle and a radical axis of this circle with a bundle of corresponding circles with a common radical axis are given. A proposal is given on the existence of a single circle in a bundle, the diametrical points of which on the lines of centers make up a harmonic four with diametral points of a given circle. It is shown that using the diametrical points of a given circle and points P, Q of the radical axis in elliptical involution, you can build double points X, Y and the radical axis of the PQ of circles in hyperbolic involution. And the tangent from the vertical diammetral point of the circle w1 to the circle passing through double points of hyperbolic involution - there is a point P(Q) of the radical axis of elliptical involution. The indicated properties make it possible to carry out a mutual transition from one involution to another. It was established that the diagonals of the quadrangles obtained when crossing all the circles of the bundle, orthogonal to the two given in elliptical involution, intersect in the center of the radical axis of the given circles in hyperbolic involution, and the diagonals of the quadrangles of all circles of the beam in hyperbolic involution are intersected in the center of the radical axis of the given circles in elliptical Involution.

The geometric place (GP) of each point of the harmonic four is constructed. In this case, the geometric place a pair of harmonic four in an elliptic involution turns out to be an ellipse that has a common tangent at points P with the circle of double points of the hyperbolic involution. And the GP pairs of the harmonic four for hyperbolic involution are two branches of the hyperbola that pass through the centers of the circles that define the elliptical involution.
ABOUT IMAGES
Authors: Sal'kov N.
Published: October 2022

In this paper, a completely different statement about the ownership of images is proposed from the generally accepted opinion. First there are definitions of well-known concepts, such as the purpose of descriptive geometry, its method, its subject. Then, gradually approaching the opinion that descriptive geometry is the theory of images, it is said about those areas of knowledge and human activity that are impossible without descriptive geometry. It is shown that images are characteristic of absolutely all areas of human activity. Mention is made of painters, graphic artists and sculptors who study descriptive geometry during training. The first drawings made on the walls of caves are mentioned, which indicates the use of descriptive geometry even before the conscious division of science into different branches of research. It is shown that any image is a mental activity of the brain, which includes the works of abstractionists to any works of painters, as well as to the halo of belonging to descriptive geometry. And since descriptive geometry deals with abstract points, lines and compartments of surfaces, then all directions of images consisting of points, lines and compartments of surfaces simply have to be attached to the field of activity of descriptive geometry.
All-Russian Scientific and Methodological Conference «Problems of Engineering Geometry» and the Seminar «Geometry and Graphics» 2021
Authors: Vyshnyepolskiy Vladimir , Kadykova Nina , Vereschagina T.
Published: October 2022

The article is devoted to the annual All-Russian scientific and methodological conference "Problems of Engineering Geometry" and the annual All-Russian scientific and methodological seminar "Geometry and Graphics" in 2021. Statistical information about the conference and seminar is provided: the number of participants, universities, the number of cities and countries in which universities are located -participants. Using the expression proposed earlier, the activity of participation of the departments of graphic disciplines in the conference "Problems of Engineering Geometry" and the seminar "Geometry and Graphics", held in 2021, was determined. The comparison of the number of participants and reports of the conference and seminar in 2021 with the number of participants and reports is given and analyzed International Internet conferences "Quality of graphic training" at the Perm National Research Polytechnic University. The results of the All-Russian Seminars "Geometry and Graphics" and the All-Russian Conferences "Problems of Engineering Geometry" of the last two years are compared with each other. In order to compare conferences and seminars quantitatively, not qualitatively, a relationship has been proposed. The content of the reports of the participants of the conference and the seminar is briefly considered. Conclusions are drawn: 1) in 2021, in terms of the success of the seminar "Geometry and Graphics" and the conference "Problems of Engineering Geometry", we managed to move forward - the success rate increased; 2) judging by the number of reports, scientific work on the profile of the department is carried out in a small number of departments. This is due to shortcomings in the staffing of departments of graphic disciplines by teachers. One of them is a lack of understanding that the winners or participants of All-Russian and regional Olympiads who have undergone appropriate training should work as teachers.
Stanowisko Rosji i Niemiec wobec akcesji Polski do NATO
Authors: Fiszer Józef M.
Published: October 2022

Po wyborach parlamentarnych w czerwcu 1989 r. i rozpoczęciu transformacji ustrojowej Polska podjęła starania o członkostwo w strukturach euroatlantyckich, które uwieńczone zostały akcesją do NATO i Unii Europejskiej. Polska musiała jednak pokonać wiele barier, w tym przezwyciężyć sprzeciw Rosji i uzyskać wsparcie Stanów Zjednoczonych i Niemiec, które wbrew deklaracjom i obietnicom polityków w praktyce nie były tak entuzjastycznie i jednoznacznie nastawione. Artykuł ukazuje negatywne stanowisko Rosji i postawę Niemiec wobec starań Polski w latach 1989–1999 o członkostwo w NATO.
INVESTIGATING THE EFFECTS OF AMBIENT TEMPERATURE ON FEATURE CONSISTENCY IN VIBRATION-BASED SHM
Authors: DARDENO TINA A. , HAYWOOD-ALEXANDER MARCUS , MILLS ROBIN S. , BULL LAWRENCE A. , DERVILIS NIKOLAOS , WORDEN KEITH
Published: October 2022

Structural health monitoring (SHM) systems have been implemented across multiple engineering applications, and SHM remains an active area of research addressing the improved safety, reliability, and management of these structures. Several challenges, however, have limited the practical implementation and generalisation of SHM technologies, such as operational and environmental fluctuations, repeatability issues, and changes in boundary conditions. These inconsistencies can be problematic for SHM based on machine learning, as healthy states may be incorrectly flagged as damaged, or damaged states may be misclassified as normal variations. Likewise, manufacturing differences can result in variation among similar structures. Accounting for these variations is especially important for a population-based approach to SHM (PBSHM), which seeks to transfer valuable information, including normal operating conditions and damage states, across similar structures. This work aims to quantify this variability, and evaluate the applicability of SHM when these deviations occur. In this paper, an experimental campaign is discussed, in which vibration data were collected over a series of tests on a set of full-scale, composite glider wings. Tests were performed at multiple ambient temperatures, and with real and simulated damage conditions. The frequency response functions of the wings are examined to identify changes in natural frequency.
Potential Character Development of Students in Karuna Jala Tangerang Banten Sunday School
Authors: Damana I Ketut
Published: October 2022

Objectives The potential for character development in Sunday school is motivated by changes in student behavior. The study tries to examine the results of the potential development of students' character. This study uses a qualitative method with a pragmatic approach. The data collection of this study wasdone through documentation and interviews with Miles andHuberman models. This study showed that, Appreciating theteacher's attitude toward the potential of character building of Buddhist Sunday school in Karuna Jala in Tangerang Banten. Supporting factors in applying the potential of character building. Challenges of the potential character building of Buddhist Sunday school. They were organizing the potential formation of the character of Buddhist Sunday school in Tangerang Jala sack monastery. Therefore, learners andteachers should be able to use the character's potential.
Instrumen Penelitian Pembelajaran Kooperatif Tipe Numbered Head Together Untuk Meningkatkan Kemampuan Komunikasi Matematis Siswa SMP
Authors: Kusumawati Yunita
Published: October 2022

Penelitian ini bertujuan untuk mengetahui tentang instrumenÂ penelitian dalam pembelajaran kooperatif tipe Numbered Head TogetherÂ untuk meningkatkan kemampuan komunikasi matematis siswa SMP di Banten. Metode penelitian yang digunakan adalah survei. Populasi penelitian ini adalah beberapa siswa di Banten, Sampel diambil dengan teknik simple random sampling, sebanyak 36 orang siswa. Instrumen yang digunakan adalah instrumen Numbered Head TogetherÂ dan Â kemampuan komunikasi matematika siswa. Data dianalisis dengan teknik korelasi regresi. Hasil pengujian hipotesis menunjukkan bahwa terdapat pengaruh positif dan signifikan pembelajaran kooperatif tipe Numbered Head TogetherÂ terhadap kemampuan komunikasi matematika.
Pengembangan E-Modul Berbasis PBL dengan Pendekatan STEM Pada Materi Ciri-Ciri Hewan, Tumbuhan, dan Habitatnya untuk Siswa Kelas VI Sekolah Dasar
Authors: Shafarina Annisa Yola , Erviana Vera Yuli
Published: October 2022

This research is motivated by the use of learning media which is still limited, and only school textbooks that do not prioritize the development of students' problem solving abilities are used. This study aims to understand the steps of developing the modular characteristics of animals, plants and their habitats and to determine their quality. This development research uses the ADDIE model (analysis, design, development, implementation, and evaluation). The objects of this research are material expert teachers, media experts, linguists, learningÂ experts and sixth grade teachers at SD Negeri Kalongan. Data collection techniques in the form of assessment. Quantitative and qualitative data analysis was used to evaluate teaching materials. This research develops modules on the characteristics of animals, plants and their habitats. The results showed that the quality of material experts was in the appropriate category, with an average score of 3.2. The quality assessment carried out by a linguist in the appropriate category had a mean score of 3.0. The quality assessment carried out by media experts using the very appropriate category has an average score of 3.4. The quality assessment carried out by learning experts has a very user-friendly category with an average score of 3.3. The teacher assesses the quality in the very appropriate category, with an average score of 3.8. These results indicate that the quality of the module is included in the very feasible category to be used as teaching materials.
Mas humanidad y menos prejuicios: el efecto del paso por la prisión en el alumnado universitario
Authors: Montero Pérez de Tudela Esther
Published: October 2022

Este trabajo se enmarca en un proyecto pionero en España consistente en la realización de un curso académico dentro de los muros de la prisión en el que alumnos de la Universidad Loyola Andalucía y alumnos del medio penitenciario, internos de la prisión de Sevilla 1, han compartido pupitre y han pasado un semestre académico “aprendiendo juntos”. A través de técnicas de enseñanza transformativa, y desde una perspectiva participativa e integradora, 29 alumnos de “dentro y de fuera de la prisión” ha realizado con éxito un seminario académico sobre Derecho y Criminología. Este estudio muestra el efecto que el paso por la prisión ha tenido sobre los estudiantes universitarios. Las pocas experiencias educativas de este tipo, previas a este proyecto, ya ponían de manifiesto los efectos positivos de este tipo de enseñanza conjunta. Ahora bien, los resultados de este proyecto han superado las expectativas iniciales: del análisis de las entrevistas semiestructuradas realizadas a los participantes antes y después de la intervención educativa, y del análisis de los grupos de discusión llevados a cabo, se desprende una importante reducción de prejuicios, la corrección de ideas preconcebidas y la reducción del punitivismo en los estudiantes universitarios.
La pedagogía de la memoria: el role play y la entrevista cualitativa en la enseñanza del Derecho Internacional Público. Una experiencia de innovación docente en las aulas universitarias peruanas
Authors: Serranò Agata , Wong Fajardo Emma Margarita
Published: October 2022

Este artículo presenta un ejercicio de innovación docente realizado en 2018 en la Facultad de Derecho de una Universidad Privada en Perú, en el marco de la asignatura de Derecho Internacional Público. El ejercicio ha empleado la estrategia didáctica de la pedagogía de la memoria, asociada a las técnicas del role play y de la entrevista cualitativa. Su objetivo fue implicar emotiva y cognitivamente a los/as estudiantes en el estudio del conflicto armado interno peruano, mediante la enseñanza práctica, para forjar una memoria inclusiva del pasado y consolidar la importancia del respeto de los derechos humanos en el aula.
Pluralidad democrática al interior de las Universidades Públicas Autónomas en México
Authors: Castro Coria Eva Grissel , Castro Coria Juan Pablo
Published: October 2022

Dado que la proporcionalidad mejora los niveles de la democracia, ya que garantiza la pluralidad de ideas y protección a los grupos sociales, el objetivo de esta investigación consistió en identificar cuáles son los porcentajes de proporcionalidad democrática al interior de las Universidades Públicas Autónomas en México, durante el ciclo escolar 2021-2022. Para lograr lo anterior y, con base en la literatura, se construyó un cuestionario que fue enviado mediante la Plataforma Nacional de Transparencia y Acceso a la Información Pública, y las respuestas se sometieron a un análisis estadístico descriptivo, la metodología empleada recabo, organizó y, dio un tratamiento a la información, aplicando la media estadística. Los resultados permiten describir la cantidad de alumnos que forman parte de las Universidades, el porcentaje de hombres y mujeres que conforman el personal administrativo y académico de la institución, los porcentajes de hombres y mujeres reportado con alguna discapacidad y los porcentajes del personal administrativo, académico y del alumnado que forman parte del Consejo Universitario, es decir, los porcentajes de proporcionalidad democrática al interior de las Universidades, además como conclusión, es importante resaltar dos elementos fundamentales; contribuciones teóricas y prácticas, atendiendo a la importancia de la construcción democrática dentro de las universidades que cuentan con autonomía para gobernarse, y por último, se presentan las limitaciones y se sugieren futuras líneas de investigación.
La educación fiscal, una estrategia para mejorar la cultura fiscal: la experiencia de la Agencia Tributaria de Catalunya
Authors: Mora Puigví Toni
Published: October 2022

El artículo pretende poner de relieve la importancia de la educación fiscal y el fomento de la pedagogía tributaria como eje estratégico en la lucha contra el fraude fiscal y la mejora de la conciencia tributaria de los ciudadanos. También, se destaca que en la actualidad es muy importante cómo se comunica la información fiscal y se hace llegar a la ciudadanía, y ahí las redes sociales y la tecnología juegan un papel importante. Como caso práctico de lo comentado se explicita la experiencia de la Agencia Tributaria de Catalunya a través del actual Plan de prevención y reducción del fraude fiscal y fomento de buenas prácticas tributarias. Dicho plan comprende el período 2019-2023 e incorpora un conjunto de medidas de educación y pedagogía fiscal que se detallan en el artículo. Finalmente, también se destaca el esfuerzo comunicativo y de transparencia de toda la información tributaria para que la ciudadanía adquiera una mayor conciencia fiscal.
Terahertz spectroscopic detection of antifatigue illegal additives in health care product matrices
Authors: Pan Wu , Xiao Huiyun , Li Haizhu , Li Yongrui , Zhang Bin , Liu Bowen , Yang Longliang
Published: October 2022

Tadalafil is an illegal
additive in antifatigue supplements. It is often misused in various
plant dietary supplements (BDS), resulting in serious health risks. In
this paper, terahertz spectroscopy combined with chemometrics is used
to quantitatively analyze the content of tadalafil in nutritional and
health products. The absorption coefficient spectrum of tadalafil in
the range of 0.1–2.5 THz was obtained, and an obvious
characteristic absorption peak appeared at 1.7 THz. To verify
the accuracy of this characteristic absorption peak theoretically,
tadalafil was simulated by density functional theory, and the
calculated terahertz vibration spectrum matched well with the
experimental spectrum. Then, the pure fatigue-based nutraceutical
matrix and pure tadalafil were mixed in different proportions, and the
terahertz absorption coefficient spectra of the mixtures were
obtained. Finally, a quantitative analysis model of the tadalafil
mixture was developed based on the support vector regression (SVR)
algorithm, and the SVR model was optimized using particle swarm
optimization (PSO) and genetic algorithm (GA), respectively. Compared
with the SVR model, both PSO-SVR and GA-SVR enabled some improvement
in their prediction accuracy, but the PSO-SVR model ran faster at
4.85 s, whereas the GA-SVR model had a higher prediction
accuracy with a prediction set correlation coefficient (

R
P

) of 0.9996 and a root mean square
error (RMSEP) of 0.011. In summary, this study used terahertz
time-domain spectroscopy for the identification and quantification of
tadalafil in health product matrices. This study provides a new
solution for the nondestructive detection of illegally added tadalafil
in antifatigue health products, which is pivotal to the quality
control of the health product industry.
T-shaped silicon waveguide coupled with a micro-ring resonator-based Fano resonance modulator
Authors: Xu Yingjie , Lu Lidan , Chen Guang , Liao Jie , Xu Xiaofeng , Ou JianZhen , Zhu Lianqing
Published: October 2022

Fano resonance has an asymmetric and sharp resonance peak near the
resonance wavelength, enhancing optical modulation performance. Here,
a Fano resonant silicon optical modulator with a micro-ring resonator
(MRR) coupled with a T-shaped waveguide is designed. Compared with an
MRR modulator, a Fano resonance-based modulator has a smaller
wavelength range of changes in optical intensity (from 0 a.u.
to 1 a.u.). Under the condition of achieving the same light
intensity change, Fano resonance only needs to shift the wavelength by
0.07 times compared with MRR. By optimizing the doping section and the
Fano resonance line shape, the modulation depth of the Fano modulator
is 12.44 dB, and an insertion loss of 0.41 dB is
obtained. Moreover, it improves the modulation linearity. This
modulator provides a new idea, to the best of our knowledge, for the
single-cavity Fano resonance modulator.
Simulation study of a temperature-calibrated double-sided polished optical fiber SPR refractive index sensor
Authors: Zhao Wanqi , Xiong Min , Chen Ming , Cheng Yu , Deng Shijie , Liu Houquan , Teng Chuanxin , Yang Hongyan , Deng Hongchang , Yuan Libo
Published: October 2022

The temperature of the environment directly affects the accuracy of refractive index (RI) measurement. Therefore, we propose a double-sided polished surface plasmon resonance (SPR) RI fiber sensor, which is available for simultaneous measurement of the RI and temperature in real time. The proposed sensor uses single-mode fiber as a special double-sided polishing structure. The double-sided polishing regions are coated with a gold–silver hybrid film; one side is additionally coated with graphene layers to increase detection sensitivity, and the other side is coated with polydimethylsiloxane on the metal layer for temperature sensing. The simulation result shows that in the range from 1.33 to 1.35, RI sensitivity reaches as high as 2600 nm/RIU. In the range from 15°C to 85°C, temperature sensitivity reaches as high as

−

3.5

n
m

/

∘

C

. The full width at half maximum is 65 nm. Compared with previous studies, the sensitivity is slightly improved, and an excellent temperature compensation effect can be achieved. It is suitable for high-precision measurement of the environment and biochemical aspects.
Non-specular reflection of a narrow spatially phase-modulated Gaussian beam
Authors: Dadoenkova Yuliya S. , Glukhov Igor A. , Moiseev Sergey G. , Bentivegna Florian F. L.
Published: October 2022

The lateral and angular Goos–Hänchen shifts undergone upon reflection on a dielectric plate by a spatially phase-modulated Gaussian beam are derived. It is shown that the amplitude and direction of both lateral and angular shifts are very sensitive to the degree of spatial phase modulation of the incident beam, so that such modulation thus provides a means to control those shifts. It is also shown that the modulation incurs some beam reshaping upon reflection. Analytical calculations of the lateral shift are found to be in good agreement with numerical simulations of beam propagation before and after reflection. In these simulations, the required spatial transverse phase modulation is achieved by focusing a microwave Gaussian beam onto the dielectric plate with a non-spherical lens or a flat-surfaced thin lamella exhibiting a suitable gradient of its refractive index. The optimal parameters governing the spatial phase modulation are discussed to achieve: (i) enhancement of the lateral shift of a spatially phase-modulated beam in comparison to that of a non-modulated beam and (ii) simultaneous large values of reflectivity and of the lateral shift, while keeping the reshaping of the reflected beam to a minimum.
Quantum kinematics in terms of observable quantities and the chirality of entangled two-qubit states
Authors: James Daniel F. V.
Published: October 2022

We consider the kinematics of bipartite quantum states as determined by observable quantities, in particular the Bloch vectors of the subsystems. In examining the simplest case of a pair of two-level systems, there is a remarkable connection between the presence of non-classical correlations and the chirality of the two bases generated by the singular value decomposition of the correlation matrix of the Bloch vectors. We investigate the limits imposed by quantum mechanics of this effect and its relationship with other methods on quantifying the system’s non-classical behavior.
Glassy behavior of modes in lasing systems with varying openness: random and whispering gallery mode lasers
Authors: Choubey Priyanka S. , Varshney Shailendra K. , Bhaktha B. N. Shivakiran
Published: October 2022

We elucidate lasing characteristics, intensity statistics, and glassy behavior of lasing systems with varying degrees of openness and intrinsic disorder. In this pursuit, we consider three distinct dye-doped polymer based lasing systems, i.e., a planar waveguide random laser (PWRL) and two different geometries of whispering gallery mode resonators (WGMRs), viz., spherical and bottle microresonators. In WGMRs, improved optical confinement enhances the quality factor of resonances and provides a low threshold and fast saturation of the number of lasing modes with pump strength. Additionally, covariance across the lasing mode intensities reveals the presence of strong mode competition. In PWRL, the statistical study reveals bimodal probability distribution (PD) of modal intensity fluctuations near-above threshold with their gradual transition to heavy tail PD far above the threshold, while the PDs for WGMRs were found to remain unimodal throughout the pumped regimes with transition to positively skewed unimodal distribution above the threshold. We also report correspondence between the onset of bimodal PD and the spin glass phase near-above threshold in PWRL. Such observations are absent for WGMRs, wherein the spin glass behavior at and above the threshold are relatively suppressed. The non-zero value of the spectral intensity fluctuation overlap parameter in WGMRs manifests the inherent disorder held by the system. We also discuss the requirement of strong mode coupling achieved by virtue of openness for the realization of glassy behavior in lasing systems.
Characterizing ultra-narrow momentum of atoms by standing-wave light-pulse sequences
Authors: Zhou Shuyu , Chen Chen , Xu Bowen , Liang Angang , Wang Ying , Wang Bin
Published: October 2022

We propose a method to characterize the ultra-narrow momentum
distribution of atomic gases by employing a standing-wave light-pulse
sequences beam splitter. The mechanism of beam splitting is analyzed
in detail, and the influence of a finite-width momentum distribution
on the population of each diffraction order is given. The temperature
of ultracold atomic gases can be calibrated by measuring the ratio of
population in different diffraction orders after double standing-wave
light pulses. We obtain analytical expressions for two typical cases,
and demonstrate phase space evolution in the whole process by using
the Wigner function. This method is valid for both classical atomic
gas and Bose–Einstein condensates, and it is suited for temperature
measurement on the space ultracold atomic physics platform, in which
the ultra-narrow momentum distribution of atomic gas is of the order
of 100 pK or even lower.
Multicolor and supercontinuum radiation generation in terahertz and mid-infrared ranges due to the gas ionization by two-color chirped laser pulses
Authors: Silaev A. A. , Romanov A. A. , Vvedenskii N. V.
Published: October 2022

A method for generating multicolor phase-stable pulses tunable in a wide range from terahertz (THz) to mid-infrared (mid-IR) is proposed. It is based on gas ionization by a laser pulse containing a linearly chirped fundamental field and several double-frequency components with different time delays. Our closed-form analytical formulas and numerical calculations show that the generated current density contains unchirped components at several detuning frequencies determined by the difference between the instantaneous frequencies of the additional laser components and twice the instantaneous frequency of the fundamental field, as well as at all triple combination detuning frequencies. The generated frequencies can be changed by varying the time delay or the chirp value. The generated pulse durations are determined by the gas ionization duration, which is much shorter than the laser pulse duration and can be varied in a wide range by changing the laser pulse duration or intensity. Under a sufficiently short ionization duration, the peak widths at the generated frequencies increase greatly, forming a supercontinuum extending from THz to the mid-IR range.
Quantum theory of cross correlation heterodyne detection
Authors: Feng Sheng , Wu Kaikai
Published: October 2022

Cross correlation heterodyne detectors exhibit the potential for suppression of the detection quantum noise below shot noise without use of optical squeezing for capturing weak optical signals in low frequency bands. To understand the underlying mechanism, we develop a quantum theory to describe the noise performance of cross correlation heterodyne detectors. By calculating the cross spectral density (CSD) of the photocurrent fluctuations from a cross correlation heterodyne detector, we prove that its noise performance can break the shot noise limit and exceed that of a regular heterodyne detector for detection of coherent light. When the detected light signal is in a squeezed state, we show that the corresponding CSD value is negative and discuss how a negative CSD may be explored to improve the output signal-to-noise ratio of the detector contaminated by classical noises through tuning the parameter of the degree of squeezing. This work may find itself useful in space-based gravitational wave searching and a variety of other scientific research activities, such as observation of vacuum magnetic birefringence and telecommunications.
High-performance mode decomposition using physics- and data-driven deep learning
Authors: Tian Zichen , Pei Li , Wang Jianshuai , Hu Kaihua , Xu Wenxuan , Zheng Jingjing , Li Jing , Ning Tigang
Published: October 2022

A novel physics- and data-driven deep-learning (PDDL) method is proposed to execute complete mode decomposition (MD) for few-mode fibers (FMFs). The PDDL scheme underlies using the embedded beam propagation model of FMF to guide the neural network (NN) to learn the essential physical features and eliminate unexpected features that conflict with the physical laws. It can greatly enhance the NN’s robustness, adaptability, and generalization ability in MD. In the case of obtaining the real modal weights (ρ2) and relative phases (θ), the PDDL method is investigated both in theory and experiment. Numerical results show that the PDDL scheme eliminates the generalization defect of traditional DL-based MD and the error fluctuation is alleviated. Compared with the DL-based MD, in the 8-mode case, the errors of ρ2 and θ can be reduced by 12 times and 100 times for beam patterns that differ greatly from the training dataset. Moreover, the PDDL maintains high accuracy even in the 8-mode MD case with a practical maximum noise factor of 0.12. In terms of adaptation, with a large variation of the core radius and NA of the FMF, the error keeps lower than 0.43% and 2.08% for ρ2 and θ, respectively without regenerating new dataset and retraining NN. The experimental configuration is set up and verifies the accuracy of the PDDL-based MD. Results show that the correlation factor of the real and reconstructed beam patterns is higher than 98%. The proposed MD-scheme shows much potential in the application of practical modal coupling characterization and laser beam quality analysis.
Loss-tolerant quantum multi-party key agreement without quantum storage
Authors: Wei Chun-Yan , Cai Xiao-Qiu , Huang Shao-Long , Lang Xiao-Lin , Wang Tian-Yin
Published: October 2022

Quantum key distribution (QKD) and quantum key agreement (QKA) are two main branches of key establishment in quantum cryptography. However, the research of QKA falls far behind that of QKD, especially in practicability. The main reason is that QKA needs to resist not only the outside eavesdropping but also the participant cheating. Resisting dishonest participant is more difficult than resisting outside eavesdropping, especially when the apparatuses are imperfect. Actually, existing QKA protocols cannot tolerate the channel loss and have to rely on stable quantum storage. To solve this problem, we give a new quantum multi-party key agreement protocol based on the error-correcting code. Our protocol is loss tolerant, and the participants can measure the received qubits immediately in one of two conjugate bases, without storage, so our protocol can eliminate the requirement of quantum storage. Besides, our protocol is more fair because it can partially discriminate dishonest participants’ cheating from outside eavesdropping (previously, these two attacks are generally checked simultaneously via decoy states but cannot be discriminated), as a result, dishonest participants generally will not cheat at the cost of losing good reputation.
Highly sensitive photopolymer for holographic data storage
Authors: Li Jinhong , Hu Po , Jin Junchao , Wang Jinyu , Liu Jie , Wu Junhui , Lin Xiao , Tan Xiaodi
Published: October 2022

The insufficient photosensitivity of conventional organic recording materials such as phenanthraquinone-doped poly(methyl methacrylate) (PQ/PMMA) significantly limits the recording speed in holographic data storage. Accelerating the formation of free radicals using the photosensitizer PQ during the photoreaction process and increasing the C = C double bond concentration of the matrix are effective methods for improving the photosensitivity. Using the above methods, we doped PQ/PMMA with the co-photoinitiator triethanolamine and co-monomer acrylamide to improve the photosensitivity of the material. Compared with the original PQ/PMMA material, the photosensitivity was increased by 10 times, and the diffraction efficiency was increased by 20%. The role of each doping component was studied by characterization and analysis. In addition, the introduction of the cross-linking agent N,N'-methylene-bisacrylamide, having high sensitivity, reduced the shrinkage of the material. We verified the application of the new material in a collinear system, and its high sensitivity showed its great potential for holographic data storage.
Investigation on mode dispersion and lamination stability of multimode polymer waveguides for an optical backplane
Authors: Xu Xiao , Liu Xu , Immonen Marika , Ma Lin , He Zuyuan
Published: October 2022

In this paper, two noteworthy issues of mode dispersion and lamination stability of multimode polymer waveguides for optical backplane are investigated. In the case of center launching by 50-µm graded-index (GI) multimode fiber (MMF), mode dispersion of polymer waveguides with different widths is analyzed theoretically and measured in the view of bit error rate (BER) curves. Compared with the waveguide with the width of 40 µm, 1-dB power penalty is observed by the 70-µm-width waveguide due to its larger mode dispersion. On the other hand, waveguide stability after laminating process with high temperature and pressure is measured experimentally. No significant changes in core shape and size are observed. The average insertion loss of 80 channels before and after lamination are 0.137 dB/cm and 0.192 dB/cm, respectively. Error-free transmission at 25 Gb/s is obtained by laminated waveguides. The results imply the feasibility and potential of multimode waveguides for optical backplane.
Integrated visible light communication and positioning CDMA system employing modified ZCZ and Walsh code
Authors: Chen Danyang , Fan Kai , Wang Jianping , Lu Huimin , Jin Jianli , Feng Lifang , Chen Hongyao , Xue Zhuo , Wang Yufeng
Published: October 2022

In this paper, an integrated visible light communication and positioning (VLCP) code division multiple access (CDMA) system is proposed for recovering original user data and obtaining positioning information simultaneously. A generalized modification method for balanced bipolar code set is presented, which can be applied to VLCP-CDMA system with intensity modulation. Both modified bipolar code sets, zero correlation zone (ZCZ) code set and Walsh code set, are employed and evaluated in VLCP-CDMA systems. When considering synchronous and quasi-synchronous (QS) systems, it is demonstrated that the modified ZCZ code set with ideal zero correlation zone properties performs better communication and positioning performance than the modified Walsh code set by system simulations and experiments. As a result, a bit error rate (BER) of 1.8×10−3 and an average positioning error of 1.50 cm are successfully obtained by adopting modified ZCZ code set in a 4-user real-time VLCP-CDMA system. It will offer a promising solution to meet both communication and positioning requirements of future intelligent systems.