bluuebunny/crossref_metadata_2025_split huggingface dataset:
Seroprevalence of hepatitis B and C viruses and some possible associated factors among cancer patients at the Oncology Treatment Center, Gondar, Northwest Ethiopia: A cross-sectional study
Authors: Atanaw Tadesse , Girmay Getu , Zemene Aragaw , Assefa Muluneh , Eshetie Tewodros , Bewket Gezahegn , Alemiye Fikadu , Belete Debaka , Birhane Nega 
Published: August 2024

Background
Cancer patients are prone to infections such as hepatitis B virus (HBV) and hepatitis C virus (HCV), which pose a major public health challenge, especially in developing countries. However, little is known about the magnitude of these infections among cancer patients in Ethiopia. Thus, this study determined the prevalence of HBV and HCV in cancer patients at the Oncology Treatment Center, Gondar, Northwest Ethiopia.

Materials and methods
An institutional-based cross-sectional study was conducted on 115 cancer patients from 15 April to 22 July 2023 at the Oncology Treatment Center, Gondar, Northwest Ethiopia. Sociodemographic, clinical, and other relevant data were collected using a pretested structured questionnaire. Five milliliters of venous blood were collected using a vacutainer tube, serum was harvested and tested for HBV and HCV using a one-step HBsAg and anti-HCV test strip with further confirmation through an ELISA test kit. Data were analyzed using SPSS version 20 and Fisher exact test was used to determine the association between HBV/HCV infection and associated factors.

Results
Out of 115 cancer patients, the majority (62.6%) were females. The median age was 50 (IQR; 40–56) years. The overall prevalence of HBV and HCV infections was 4.3% (95% CI; 0.6–8%) and 6.1% (95% CI; 1.7–10.5%), respectively. Sex was significantly associated with the prevalence of HCV (p = 0.011) with higher anti-HCV positivity in males (14%) than in females (1.4%).

Conclusions
In this study, the prevalence of HCV was higher and the HBV prevalence was intermediate in cancer patients. To reduce the burden of HBV and HCV infections, it is crucial to provide access to HBV and HCV screening services, strengthen vaccination, and improve prompt treatment in cancer patients.
Cardiac Mass in a 78-Year-Old Patient With a History of Cancer: Diagnostic and Treatment Challenges
Authors: Zhao Bihong , Zaqqa Ayah , McDonald Michelle M. , de Armas Ismael A. Salas , Gregoric Igor D. , Buja L. Maximilian 
Published: August 2024

Abstract
Primary cardiac angiosarcoma is a rare, aggressive malignancy that commonly metastasizes to various organs. The presenting symptoms are typically nonspecific, so a comprehensive examination is required to confirm the diagnosis promptly. This case report describes the presentation of an older patient with a history of neoplasms. Echocardiography and biopsy were performed, but despite surgical intervention to resect a large right atrial mass, the patient died. A final diagnosis of primary angiosarcoma was made based on the resected specimen.
Surgical treatment of kyphosis due to avascular osteonecrosis of the vertebral bodies
Authors: Borzykh K. O. , Rerikh V. V. , Sinyavin V. D. 
Published: August 2024

Objective. To analyze the results of surgical treatment of patients with fixed spinal deformity due to osteonecrosis of the vertebral bodies of the thoracic and lumbar spine.Material and Methods. The data obtained from the case histories of 40 patients operated on for kyphosis due to osteonecrosis of the vertebral bodies were studied. The patients underwent staged surgical interventions in one surgical session. Demographic data and radiological results of surgical treatment before surgery, after surgery and up to 1 year after surgery were assessed.Results. As a result of surgical interventions, local kyphosis was corrected on average from 30° to -0.25°. After correction of kyphosis, statistically significant changes in the sagittal curves of the spine were revealed: an increase in thoracic kyphosis and a decrease in lumbar lordosis. There was an improvement in sagittal balance indicators in the form of a regression in the number of imbalanced patients – 17 (42.5 %) patients improved balance indicators. During the follow-up period, a statistically significant improvement in VAS and ODI scores was noted. Intra- and postoperative complications accounted for 35 %, and 8 (20 %) mechanical complications were identified during dynamic observation. Predictors of mechanical complications were the presence of imbalance: 2 and 3 points according to the balance modifier of the Formica classification and the GT index (global angle) > 7°, and insufficient correction of kyphosis (LK postOp > 4°), T-score index < -3.35.Conclusion. Simultaneous staged surgical interventions allow for complete correction of the deformity, restoration of the sagittal profile, thereby improvement of the patient’s quality of life. To reduce mechanical complications when planning and performing surgical intervention, it is necessary to take into account the identified predictors.
Evaluation of the effectiveness of surgical treatment of tethered spinal cord syndrome of secondary origin in spina bifida: a systematic review
Authors: Ryabykh S. O. , Kalashnikov A. A. , Lysachev D. A. , Klimov V. S. , Gubin A. V. , Dyachkov K. A. , Khuzhanazarov I. E. , Eshkulov D. I. 
Published: August 2024

Objective. To present a literature review assessing the effectiveness of surgical treatment methods for tethered spinal cord syndrome of secondary origin in spina bifida.Material and Methods. The Pubmed, EMBASE, eLibrary, and Cochrane Library databases were searched for prospective cohort clinical studies published from 2009 to 2024 and evaluating the effectiveness of methods for correcting tethered spinal cord syndrome in spina bifida. The study was carried out in accordance with the guidelines for Preferred Reporting Items for writing Systematic Reviews and Meta-Analyses (PRISMA).Results. During this period, 20 articles were published assessing the effectiveness of surgical methods for correcting tethered spinal cord syndrome. Of these, 15 are pragmatic clinical trials and 5 are randomized clinical trials. The average level of evidence is III.Conclusion. Currently, it can be stated that there is an intra-expert consensus regarding functional radiological criteria for tethered spinal cord syndrome of secondary origin in spina bifida. However, the issue of the effectiveness of surgical intervention directly depends on the availability of objective methods for clinical assessment of the severity of functional deficit and the reversibility of morphofunctional changes in the nervous tissue. Despite the variety of clinical scales and questionnaires, there is no unified assessment system for neurological, urological and orthopedic deficits in patients with tethered spinal cord syndrome. In this context, functional MRI (spinal MR tractography) can be considered a promising method for objectifying the pathological process. However, the phenomena revealed during the examination are not fully studied and require further research.
Results of surgical treatment of early-onset scoliosis using growth-friendly implants: analysis of a 10-year monocentric cohort
Authors: Molotkov Yu. V. , Ryabykh S. O. , Evsyukov A. V. , Savin D. M. , Filatov E. Yu. 
Published: August 2024

Objective. To evaluate early and medium-term results of surgical treatment of early-onset scoliosis using the principle of growth-friendly systems.Material and Methods. A retrospective analysis of the medical records of 54 patients treated using surgical distractible metal implants was carried out. Patients were divided into 4 etiological groups: congenital (n = 17), systemic (n = 12), idiopathic (n = 16) and neurogenic scoliosis (9). The boy/girl ratio was 11/43. The average age at which patients started treatment was 9.6 years, and at the end of treatment – 13.2 years.Results. Radiometric parameters were assessed during and after completion of treatment. The Cobb angle of the main curve of deformity before treatment averaged 56.1°, after the primary operation – 31.8°, and after completion of treatment – 23.2°. Correction of the main deformity curve for the entire period of multi-stage surgical treatment was 57.8 %. The highest initial magnitude of deformity was noted in the group of neuromuscular scoliosis (67.6°), and the lowest in the group of congenital pathology (50.4°). In the groups of systemic and idiopathic scoliosis, the preoperative values were very close: 53.4° for systemic scoliosis and 57.6° for idiopathic scoliosis. According to the results of staged treatment in the neuromuscular scoliosis group, the residual curvature of the main curve was the lowest, and the percentage of its correction was the highest – 18.9° and 73.6 %, respectively, versus 24.5° and 49.7 % in the congenital scoliosis group. The effectiveness of treatment with an assessment of the percentage of correction after final instrumentation in groups of idiopathic and systemic scoliosis was close: 23,0° and 62.3 %, and 28.5° and 51.5 %, respectively. Identical average values of the main curve angle after final instrumentation were noted in all four etiological groups (on average, 23.2°). Changes in thoracic kyphosis and lumbar lordosis were insignificant. During the treatment, 22 unplanned surgical interventions were performed in 15 patients.Conclusion. This study revealed a number of key points that in the future may help in the formation of clearer algorithms of selecting the most optimal technique: neurogenic scoliosis is most successfully corrected by growing systems, and congenital scoliosis shows less pronounced correction of deformity and a greater relative number of complications per patient with a single use of growing systems, which requires caution during staged surgical treatment.
Analisis Pemetaan Potensi dan Realisasi Energi Baru Terbarukan (EBT) dengan Pemodelan Determinan Konsumsi dan Metode Grouping Analysis EBT di Indonesia
Authors: Sianipar Reinhard Jordan , Januar Ralditiya Rifki , Silalahi Stevay David Christian 
Published: August 2024

Indonesia merupakan negara yang menyimpan potensi Energi Baru Terbarukan (EBT) yang sangat besar, terutama dalam rangka memenuhi kebutuhan energi nasional. Akan tetapi, pemanfaatan dari EBT di Indonesia masih tergolong sangat kecil apabila dibandingkan dengan jenis energi lain. Sumber energi utama Indonesia selama 10 tahun terakhir didominasi oleh sumber energi fosil dengan persentase sekitar 92%, sedangkan sisanya sebesar 8% baru dimanfaatkan dari EBT. Tujuan penelitian ini adalah untuk melakukan pemetaan realisasi dan potensi dari sumber EBT di setiap daerah di Indonesia, serta melakukan pemodelan terhadap determinan dalam penggunaan EBT di Indonesia. Analisis ini menggunakan metode pemetaan Grouping Analysis untuk melihat pengelompokan realisasi dan potensi EBT serta metode VAR dalam menganalisis hubungan antara persentase konsumsi EBT di Indonesia terhadap produksi minyak mentah serta rata-rata penggunaan listrik per kapita. Hasil analisis menunjukkan persebaran dari potensi EBT yang sangat besar di Indonesia belum sejalan dengan realisasi dari pemanfaatannya. Hasil ini juga menunjukkan adanya pengaruh negatif dari produksi minyak bumi, baik secara jangka panjang, maupun secara jangka pendek terhadap konsumsi EBT. Sedangkan, penggunaan listrik per kapita menunjukkan adanya pengaruh positif, baik secara jangka panjang, maupun secara jangka pendek terhadap konsumsi EBT di Indonesia. Hasil analisis ini diharapkan menjadi acuan dalam pemanfaatan EBT dalam lingkup spasial, terutama yang merujuk pada kebijakan Rencana Umum Energi Daerah (RUED), serta melihat faktor yang mempengaruhi konsumsi EBT di Indonesia. Kata Kunci : Energi Baru Terbarukan, Grouping Analysis, VAR
An Inverse Matrix Eigenvalue Problem for Constructing a Vibrating Rod
Authors: Mirzaei Hanif , Abbasnavaz Vahid , Ghanbari Kazem 
Published: August 2024

Abstract
The free longitudinal vibrations of a rod are described by a differential equation of the form

(
P

(
x
)

y
′
)

′

+
λ
P

(
x
)

y

(
x
)

=
0

{(P(x)y\prime)^{\prime}+\lambda P(x)y(x)=0}

, where

P
⁢

(
x
)

{P(x)}

is the cross section area at point x and λ is an eigenvalue parameter. In this paper, first we discretize this differential equation by using the finite difference method to obtain a matrix eigenvalue problem of the form

𝐀
⁢
Y

=

Λ
⁢
𝐁
⁢
Y

{\mathbf{A}Y=\Lambda\mathbf{B}Y}

, where

𝐀

{\mathbf{A}}

and

𝐁

{\mathbf{B}}

are Jacobi and diagonal matrices dependent to cross section

P
⁢

(
x
)

{P(x)}

, respectively. Then we estimate the eigenvalues of the rod equation by correcting the eigenvalues of the resulting matrix eigenvalue problem. We give a method based on a correction idea to construct the cross section

P
⁢

(
x
)

{P(x)}

by solving an inverse matrix eigenvalue problem. We give some numerical examples to illustrate the efficiency of the proposed method. The results show that the convergence order of the method is

O
⁢

(

h
2

)

{O(h^{2})}

.
Locally conjugate Galois sections
Authors: Porowski Wojciech 
Published: August 2024

Abstract
We consider sections of the étale homotopy exact sequence of a hyperbolic curve over a number field. We prove that two sections whose restrictions to decomposition groups are conjugate on a set of valuations of density one are globally conjugate, which establishes the local-global principle for the conjugacy classes of sections. In fact, we obtain this result as a corollary of a more general property concerning sections of the étale homotopy exact sequence, the finite covering property, which we prove as our main result.
Coupled and Coordinated Development of Economic Growth and Green Sustainability in a Manufacturing Enterprise under the Context of Dual Carbon Goals: Carbon Peaking and Carbon Neutrality
Authors: Shen Hongbing , Wang Zhe 
Published: August 2024

Abstract
The coupled and coordinated development between economic growth and the utilization of resources and the environment in manufacturing enterprises holds great significance in achieving high-quality, efficient, and low-energy consumption goals, and promoting the green and sustainable development of the manufacturing industry. This paper proposes an evaluation indicator system for a manufacturing enterprise under the context of carbon peak and carbon neutrality goals and establishes an evaluation model and comprehensive evaluation index. By organizing the relevant data on the economic development and ecological environment of this manufacturing enterprise from 2016 to 2022 and calculating the weighting coefficients, coupling model, and coupling degree model, the coupling development level of the manufacturing enterprise was evaluated. Empirical results demonstrate that the coupled development between economic growth and the ecological environment in the enterprise is in a stable rising state, transitioning from a moderately imbalanced state to a barely coordinated level. The enterprise should continue to research coupling points, explore coupling control directions, formulate targeted policies, and strive to reach a level of high-quality and coordinated development.
A new notion of convergence defined by weak Fibonacci lacunary statistical convergence in normed spaces
Authors: Ibrahim Ibrahim S. , Listán-García María C. , Colak Rifat 
Published: August 2024

Abstract
The applications of a Fibonacci sequence in mathematics extend far beyond their initial discovery and theoretical significance. The Fibonacci sequence proves to be a versatile tool with real-world implications and the practical utility of manifests in various fields, including optimization algorithms, computer science and finance. In this research paper, we introduce new versions of convergence and summability of sequences in normed spaces with the help of the Fibonacci sequence called weak Fibonacci φ-lacunary statistical convergence and weak Fibonacci φ-lacunary summability, where φ is a modulus function under certain conditions. Furthermore, we obtain some relations related to these concepts in normed spaces.
Symmetry-protected bound states in the continuum on an integrated photonic platform
Authors: Lu Qijing , Feng Ziyao , Sun Xiankai 
Published: August 2024

Abstract
Bound states in the continuum (BICs) have attracted much attention in the field of nanophotonics owing to their ability to trap photons without loss. Recently, a low-refractive-index (RI) waveguide loaded on a high-RI slab structure was demonstrated to support BICs. However, strict control of structural parameters is required due to the accidental nature of those BICs. Here, we propose a novel structure consisting of two low-RI vertically coupled waveguides loaded on a high-RI slab. This structure supports symmetry-protected BICs (SP-BICs), which do not require strict control of the geometric parameters. Such SP-BICs can also possess an infinitely high quality factor in resonant structures, which can be harnessed for ultranarrow-bandwidth spatial and spectral filters. Our work opens a new way of harnessing BICs on an integrated photonic platform for realizing nanophotonic circuits and devices.
Minimax interpolation of continuous time stochastic processes with periodically correlated increments observed with noise
Authors: Luz Maksym , Moklyachuk Mikhail 
Published: August 2024

Abstract
We deal with the problem of optimal estimation of linear functionals
constructed from the missed values of a continuous time stochastic process

ξ
⁢

(
t
)

{\xi(t)}

with periodically stationary increments at points

t
∈

[
0
;

(

N
+
1

)

⁢
T

]

t\in[0;(N+1)T]

based on observations of this process with periodically stationary noise. To solve the problem,
a sequence of stochastic functions

{

ξ
j

(
d
)

⁢

(
u
)

=

ξ
j

(
d
)

⁢

(

u
+

j
⁢
T

,
τ
)

,

u
∈

[
0
,
T
)

,

j
∈
ℤ

}

{\{\xi^{(d)}_{j}(u)=\xi^{(d)}_{j}(u+jT,\tau),u\in[0,T),\,j\in\mathbb{Z}\}}

is constructed. It forms an

L
2

⁢

(

[
0
,
T
)

;
H
)

{L_{2}([0,T);H)}

-valued
stationary increment sequence

{

ξ
j

(
d
)

,
j

∈
ℤ

}

{\{\xi^{(d)}_{j},j\in\mathbb{Z}\}}

or corresponding to it
an (infinite-dimensional) vector stationary increment sequence

{

ξ
→

j

(
d
)

=

(

ξ

k
⁢
j

(
d
)

,
k
=
1
,
2
,
…
)

⊤

,
j
∈
ℤ
}

{\{\vec{\xi}^{(d)}_{j}=(\xi^{(d)}_{kj},k=1,2,\dots)^{\top},\,j\in\mathbb{Z}\}}

.
In the case of a known spectral density, we obtain formulas for calculating values of the mean square errors and the spectral characteristics of the optimal estimates of the functionals.
Formulas determining the least favorable spectral densities and the minimax (robust) spectral
characteristics of the optimal linear estimates of functionals
are derived in the case where the sets of admissible spectral densities are given.
СОЦІАЛЬНИЙ КАПІТАЛ БІЗНЕСУ: МЕТА, ФОРМУВАННЯ І СТРАТЕГІЇ РЕАЛІЗАЦІЇ
Authors: ОНИЩЕНКО Володимир 
Published: August 2024

Доведено визначальну роль соціального капіталу в післявоєнній відбудові України. Соціальний капітал розглянуто як категорію економічної теорії, а його цілі, умови і стратегію відтворення – як категорію капіталу на рівні бізнес-структури. Показано, що для відбудови України необхідно активно відтворювати соціальний капітал держави, і в першу чергу – на рівні бізнес-структур; головним продуктом соціального капіталу є довіра, яка сприяє підвищенню ефективності економічного суб’єкта через формування до нього довіри ринку; умовами формування довіри є свобода і справедливість, які повинні панувати у соціально-економічних відносинах суспільства.
Доведено, що соціальний капітал слід розглядати в контексті економічної теорії і практики як інвестиції у відтворення соціальних ресурсів суспільства на всіх його рівнях для підвищення ефективності економіки і, відповідно, рівня життя населення. Показано, що йому притаманні складові, які визначають капітал у його класичному розумінні. Результатом реалізації соціального капіталу є підвищення ефективності економіки, яке є наслідком зростання довіри ринку до бізнесу, в тому числі й ринку робочої сили. Визначено, що у формуванні соціального капіталу бізнес-структури велике значення мають сучасні маркетингові технології, які формують ринкову довіру до неї, і соціальний менеджмент, який сприяє формуванню її внутрішнього соціального капіталу.
Відтворення соціального капіталу в Україні на рівні бізнесу, держави та її соціальних утворень не є прийнятним, про що говорить незадовільне становище України в багатьох світових рейтингах, які відображають рівень соціального капіталу.
Techno-Economic Feasibility Analysis of a Diesel/ Organic Rankine cycle system for Distributed Generation
Authors: Galindo Noguera Ana Lisbeth , Mendoza Castellanos Luis Sebastián 
Published: August 2024

he use of an Organic Rankine Cycle (ORC) for exhaust gas heat recovery from diesel generator sets allows the production of additional power, and thus supplies an additional energy demand in isolated locations. An energy model of the diesel generator was developed, which allows the determination of parameters such as the specific heat, mass flow rate, and exhaust gas temperature required for system design. R245fa was used as the ORC working fluid. A comparative analysis was performed between the use of conventional diesel generators and the diesel-ORC system in the case of a non-interconnected region in Brazil in terms of energy cost, specific fuel consumption, and electrical efficiency. The results show that a specific fuel consumption of 0.271 L/kWh is obtained with the diesel generator system, while that of the diesel-ORC is 0.248 L/kWh. The energy cost of the diesel-ORC system was 15.56 % lower than that of the diesel generator system.
Consolidating peace? The inner struggles of Sudan’s transition agreement
Authors: Tchie Andrew E. Yaw , Llorens Zabala Mariana 
Published: August 2024

The use of transitional agreements across the African continent appears to be on the rise. However, many transitional agreements tend to be stagnant and fail to deal with grievances, causes of conflict or to provide sustainable paths to democracy. Drawing on the civilian-led Transitional Government of Sudan from 11 April 2019 to 25 October 2021 (the length of the transitional agreement), and an original dataset, this article argues that the policies of the transitional government of Sudan, political rhetoric and the challenges of implementing transitional agreement policies did not align with political realities. This was primarily due to the inability of the Transitional Government of Sudan to dismantle existing power structures under previous regimes. We find that the Transitional Government of Sudan neglected to consider path dependencies of the previous regimes, which led to its being unable to provide the people of Sudan with strategies to circumvent existing structures set up by past regimes. As a result, efforts of the Transitional Government of Sudan acted as exacerbators of existing inner struggles. The article argues for the need for better technical support and provisions to support incoming transitional governments trying to emerge from autocracy or dictatorship to democracy during transitional periods.