bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Vector dynamics of Ikogosi Wind Speed/direction relative to Climate Change
Authors: Abodunrin T.J. , Emetere M.E. 
Published: February 2021

Abstract
This study appraises anticipated vicissitudes to surface wind characteristics from 1980-2018 in Ikogosi South-Western Nigeria. Changes in wind speeds at regional and global levels are signals of global warming. A concern about climate change has been a major driving force for the speedy expansion experienced in wind energy projects. Yearly investigation of wind speed disguises seasonal variation in predictive planning. At times, these changes fluctuate across seasons in some zones. The Inter-governmental Panel on Climate Change (IPCC) gave a proponent for long-term changes in the large-scale atmospheric circulation. In effect, observed changes such as poleward shifts and reinforcement of westerly winds will likely be promoted. Projected changes to annual wind speed display altitudinal variability compared to seasonal and annual mean wind speed. An evaluation of wind changes at specific locations is therefore necessary for site-specific application. This paper presents experience at Ikogosi warm spring site with varying return periods, analysedfor identificationof the behaviour of its wind using several statisticsprobability distribution. Average wind speed of 2.2 m/s in Ikogosi certainly portends a future for hydro-electricity alternative in Nigeria.
Reliability Assessment of an Off-Grid Hybrid Micro-Grid Power System (HMPS) for a Remote Community in Nigeria
Authors: Amuta E.O. , Wara S.T. , Agbetuyi A.F. , Adoghe U.A. , Olajube A. 
Published: February 2021

Abstract
Power System reliability assessment is one of the most crucial mensurations to evaluate power provider services and continuous availability. Hybrid Renewable Energy Systems (HRES) are an effective means to provide off-grid electrification to the rural areas that predominantly do not have access to electricity. This paper presents the reliability performance of a typical remote Obayantor community hybrid micro-grid in Edo state, Southern Nigeria. The hybrid energy system provides power for 90 households via a combination of 300W Solar Photovoltaic (PV) Modules, 1200Ah back-up battery system, and a 65kW diesel generator. The PV modules generate power throughout the day; the back-up provides energy source in the night while the diesel generator is sparingly used only in the event of faults, maintenance, or repairs. The reliability indices calculated were Mean Time to Repair (MTTR), Mean Time Between Failure (MTBF), and Availability using the outage data obtained from the microgrid between 2015 and 2019. The results recorded showed that the micro - grid was always available due to low downtime and low frequency of outages over the five years studied. Except in 2018, when the result recorded had the highest rate of power of interruption, which gave rise to the smallest value of availability and MTBF obtained in the same year. 2015 and 2019 had the highest availability value of 99.8%, and this value showed a similar trend to MTBF with the highest value in 2015 and the minimum value in 2018.
Density Functional Theory Approach to the Study of the Structural Stability of Nitrides of Iron and Nickel
Authors: Atsue T. , Oyewande O. E. , Ogunniranye I. B. , Aizebeokhai A. P. 
Published: February 2021

Abstract
Nitrides of transition metals such as iron and nickel are known to possess excellent properties relevant for technological applications. Among these, FeNhas been synthesized in zinc blende face centered cubic (F4

3

¯

M) crystal structure while NiN has not been synthesized yet. Literature search revealed that hexagonal close packed and primitive tetragonal structures of these compounds have not been investigated to ascertain their preference.Therefore, the structural stability of Zinc blende face centered cubic, hexagonal closed packed and primitive tetragonal crystal structures of the compounds were investigated in this study. Generalized gradient approximation of Perdew-Burke-Ernzerhof revised for solids (GGA-PBEsol) as implemented in Quantum espresso package was used based on density functional theory for the computation. The results revealed that FeN and NiNcompounds prefer Zinc blende face centered cubic crystal structure as their equilibrium lattice parameters occurred at the least equilibrium minimum energies in this structure. The lattice parameters of FeN and NiN compounds in thezinc blende FCC crystal structure were computed to be 4.232 Å and 4.324 Å respectively in agreement with experiment and previous computations. The preference of zinc blende FCC crystal structure by these compounds imply they may possess highly directional covalent bonds that prefer a tetrahedral arrangement of atoms, thus forming good binary semiconductor compounds. Therefore, these compounds have high possibility of been synthesized in zinc blende FCC crystal structure.
Rare earth elements in Uranium ore for nuclear forensic application
Authors: John S.O.O. , Usman I.T. , Akpa T.C. , Ibrahim U. 
Published: February 2021

Abstract
The contents of the Lanthanides, which are Rare Earth Elements (REE), that show consistent patterns under changing geochemical conditions in uranium ore have been studied. The objective is to determine the nuclear forensic parameters inherent to the various uranium ore samples collected from parts of northern Nigeria using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) analytical technique for the purpose of baseline data generation and nuclear forensic application. The REE fingerprint obtained in this study suggests that the uranium is of uraninite/pitchblende granitic (vein-type) origin. The REE concentrations varied from 0.011 ± 0.000 ppm to 2.337 ± 0.082 ppm for Riruwai, 0.001 ± 0.000 ppm to 0.035 ± 0.002 ppm for Mika-I, 0.002 ± 0.000 ppm to 0.357 ± 0.007 ppm for Mika-II and 0.001 ± 0.001 ppm to 0.159 ± 0.005 ppm for Michika. A positive correlation between the REEs showed symmetrical chemical properties as well as their overall presence in the samples. The normalised REE/Cl-Chondrites pattern show Light Rare Earth Elements(LREE) enrichment, Heavy Rare Earth Elements (HREE) fractionation with a negative Europium (Eu) anomaly. The ΣLREE/ΣHREE ratio presented varied values for the samples while a negative value of 143Nd/144Nd ratio (0.512638) in the Chondritic Uniform Reservoir (CHUR) ε
Nd(-0.64285) suggested LREE uniformity and radiogenic origin.
Soil salinity and its implications on sustainable agriculture in Southern and Northcentral States of Nigeria
Authors: Kayode O. T. , Aizebeokhai A. P. , Odukoya A. M. 
Published: February 2021

Abstract
Soil salinity impedes agricultural production, threatens global food security and agricultural profits. Soil salinity is a global issue and the accurate assessment of salt affected areas can assist in combating global climate change, effectively manage and utilize limited land and water resources. Landsat series of the multispectral remote sensing provides the potential for frequent surveys for soil salinization at various scales and resolutions. For this research, twenty tiles of Landsat 8 imagery between 2018 and 2019 were used to generate the soil salinity index map for the study area. The result revealed the salinity index status for all the areas investigated. Reclamation of salt affected land and management practices to curb soil salinity is highly recommended.
Large-scale Agricultural Investments and Female Employment in Nigerian Communities
Authors: Edafe O. O. , Osabuohien E. , Osabohien R. 
Published: February 2021

AbstractThis study examines how large-scale agricultural investments (LSAIs) affect employment outcomes of female households in Nigeria. It focuses on wage income and labour allocations to agricultural activities for households in communities with LSAIs compared with households in communities without LSAIs. It engages Wave 4 (2018/2019) of the Living Standards Measurement Study-Integrated Surveys on Agriculture (LSMS-ISA) dataset using the Propensity Score Matching (PSM) technique. The results show a positive relationship with the household income living in communities with LSAIs, but a negative relationship with the labour allocation to agricultural activities. Furthermore, the findings indicate that households in communities with LSAIs received higher wages and spend fewer hours in agricultural activities. Also, though female-head households spend more hours on agricultural activities than male-headed households, they earn less. Therefore, the study submits with some recommendations on reducing the possible adverse effects of LSAIs and optimising its positive impact, especially for females in rural communities where most of such investments occur.
A conceptual framework for evaluating public housing for resilience to rapid population growth
Authors: Equere Enobong B. , Ibem Eziyi O. , Alagbe Oluwole A. 
Published: February 2021

Abstract
The concept of resilience is increasingly being used in discourses on cities. However, there is paucity of` studies on the evaluation of public housing for resilience to urban population growth, especially in a developing country like Nigeria. This paper explored the concept of resilience on housing, and proposed a conceptual framework for the evaluation of public housing towards achieving resilience to the impacts of rapid population growth in cities. The methodology adopted includemapping the multidisciplinary data sources; reviewing the literature and categorizing the selected data; identifying and naming the concepts; deconstructing and categorizing the concepts and systematicintegration of the concepts to form the framework. The basic concepts identified in the literature for studying housing for city resilience in the face of rapid population growth were the vulnerability, adaptability and systems thinking theories. Based on these construct of theories, the study developed the conceptual framework around four key components. These components were (i) the impacts of rapid population growth on the social, economic and environmental fabrics of the city, (ii) the strategies or interventions that the actors can adoptthrough design and development characteristics, and building adaptive capacities towards the impacts, (iii)the effect of this strategies and interventions on the design and development of public housing and (iv) the systemic approach towards optimising the capacity of public housing schemes to absorb the adverse impacts of rapid population growth. This study contends that theoretical approach is important in understanding the development of housing that would promote city resilience in the face of growing negative impacts of rapid urbanisation in developing countries. It suggests the adoption of the proposed conceptual framework as guidelines to architects and other housing development professionals, as an evaluation parameter for resilience research and solving housing delivery problems in cities of developing countries.
Effects of annealing temperature on microstructural, magnetic properties, and specific absorption rate of Zn-Ni ferrite nanoparticles
Authors: Suharyadi Edi , Pratiwi Sri Handika , Indrayana I Putu Tedy , Kato Takeshi , Iwata Satoshi , Ohto Keisuke 
Published: February 2021

Abstract
Zn-Ni ferrite nanoparticles were successfully synthesized by coprecipitation method. The samples were annealed at various temperatures, i.e., 200 °C, 400 °C, 600 °C, 800 °C, and 1000 °C. The nanoparticles have the mixed spinel phase structure as confirmed by the X-ray diffraction patterns. The crystallite size was 15.1 nm and increased to 25.1 nm after annealing at 1000 °C. Transmission electron microscope images showed that the annealed sample exhibited better dispersion and grain boundaries compared to the as-prepared sample. Fourier transform infra-red spectra showed the existence of vibrations at 378 cm−1 and 555 cm−1, confirming bonding for mixed spinel ferrites. The hysteresis measurement by using vibrating sample magnetometer confirmed that the sample possessed soft magnetic properties with a coercivity of 45 Oe and increased after annealing. The saturation magnetization of the as-prepared sample was 11 emu g−1, and increased to 58 emu g−1 after annealing at a temperature of 800 and 1000 °C. The specific absorption rate (SAR) with an alternating current magnetic field (50 Hz and 100 Oe) of Zn-Ni ferrite before and after annealing (at 800 °C) was 63.7 and 92.4 mW g−1, respectively. The results showed that annealing temperature has a significant role in determining the microstructural, the magnetic properties and the SAR of the nanoparticles.
Quantum information processing with bosonic qubits in circuit QED
Authors: Joshi Atharv , Noh Kyungjoo , Gao Yvonne Y 
Published: February 2021

Abstract
The unique features of quantum theory offer a powerful new paradigm for information processing. Translating these mathematical abstractions into useful algorithms and applications requires quantum systems with significant complexity and sufficiently low error rates. Such quantum systems must be made from robust hardware that can coherently store, process, and extract the encoded information, as well as possess effective quantum error correction (QEC) protocols to detect and correct errors. Circuit quantum electrodynamics (cQED) provides a promising hardware platform for implementing robust quantum devices. In particular, bosonic encodings in cQED that use multi-photon states of superconducting cavities to encode information have shown success in realizing hardware-efficient QEC. Here, we review recent developments in the theory and implementation of QEC with bosonic codes and report the progress made toward realizing fault-tolerant quantum information processing with cQED devices.
Adams’ inequality with logarithmic weights in ℝ⁴
Authors: Zhu Maochun , Wang Lianfang 
Published: February 2021

Trudinger-Moser inequality with logarithmic weight was first established by Calanchi and Ruf [J. Differential Equations 258 (2015), pp. 1967–1989]. The aim of this paper is to address the higher order version; more precisely, we show the following inequality

sup

u
∈

W

0
,
r
a
d

2
,
2

(
B
,
ω
)
,

‖

Δ
u

‖

ω

≤
1

∫
B

exp
⁡

(

α

|
u
|

2

1
−
β

)

d
x
>
+
∞

\begin{equation*} \sup _{u \in W_{0,rad}^{2,2}(B,\omega ),{{\left \| {\Delta u} \right \|}_\omega } \le 1} \int _B {\exp \left ( {\alpha {{\left | u \right |}^{\frac {2}{{1 - \beta }}}}} \right )} dx > + \infty \end{equation*}

holds if and only if
\[

α
≤

α
β

=
4

[

8

π
2

(

1
−
β

)

]

1

1
−
β

,

\alpha \le {\alpha _\beta } = 4{\left [ {8{\pi ^2}\left ( {1 - \beta } \right )} \right ]^{\frac {1}{{1 - \beta }}}},

\]
where

B
B

denotes the unit ball in

R

4

\mathbb {R}^{4}

,

β
∈

(

0
,
1

)

\beta \in \left ( {0,1} \right )

,

ω

(
x
)

=

(

log
⁡

1

|
x
|

)

β

\omega \left ( x \right ) = {\left ( {\log \frac {1}{{\left | x \right |}}} \right )^\beta }

or

(

log
⁡

e

|
x
|

)

β

{\left ( {\log \frac {e}{{\left | x \right |}}} \right )^\beta }

, and

W

0
,
r
a
d

2
,
2

(
B
,
ω
)

W_{0,rad}^{2,2}(B,\omega )

is the weighted Sobolev spaces. Our proof is based on a suitable change of variable that allows us to represent the laplacian of

u
u

in terms of the second derivatives with respect to the new variable; this method was first used by Tarsi [Potential Anal. 37 (2012), pp. 353–385].
A note on congruences for weakly holomorphic modular forms
Authors: Dembner Spencer , Jain Vanshika 
Published: February 2021

Let

O
L

O_L

be the ring of integers of a number field

L
L

. Write

q
=

e

2
π
i
z

q = e^{2 \pi i z}

, and suppose that

f
(
z
)
=

∑

n
≫
−
∞

a
f

(
n
)

q
n

∈

M

k

!

(

SL
2

⁡
(

Z

)
)
∩

O
L

[
[
q
]
]

\begin{equation*} f(z) = \sum _{n \gg - \infty } a_f(n) q^n \in M_{k}^{!}(\operatorname {SL}_2(\mathbb {Z})) \cap O_L[[q]] \end{equation*}

is a weakly holomorphic modular form of even weight

k
≤
2

k \leq 2

. We answer a question of Ono by showing that if

p
≥
5

p \geq 5

is prime and

2
−
k
=
r
(
p
−
1
)
+
2

p
t

2-k = r(p-1) + 2 p^t

for some

r
≥
0

r \geq 0

and

t
>
0

t > 0

, then

a
f

(

p
t

)
≡
0

(
mod

p
)

a_f(p^t) \equiv 0 \pmod p

. For

p
=
2
,
3
,

p = 2,3,

we show the same result, under the condition that

2
−
k
−
2

p
t

2 - k - 2 p^t

is even and at least

4
4

. This represents the “missing case” of Theorem 2.5 from [Proc. Amer. Math. Soc. 144 (2016), pp. 4591–4597].
Chemoenzymatic semisynthesis of caffeic acid β-phenethyl ester, an antioxidative component in propolis, from raw coffee bean extract
Authors: Hashimoto Riichi , Iai Hiyori , Fujita Rie , Hanaya Kengo , Higashibayashi Shuhei , Inoue Hiroyoshi , Sugai Takeshi 
Published: February 2021

ABSTRACT
Caffeic acid β-phenethyl ester (CAPE), an antioxidative bioactive catechol isolated from propolis, was semisynthesized from chlorogenic acid and related compounds in an extract of raw (unroasted) Robusta coffee (Coffea canephora) beans in 5 steps and a total yield of 31%. Oxidative degradation of the intermediates and target molecule was prevented by alkaline hydrolysis of the chlorogenic acids in the presence of sodium dithionite (Na2S2O4) and deprotection of the catecholic diacetate precursor by Candida antarctica lipase B-mediated transesterification as the final step.
The evaluation of lymph node cell proliferation response by liposomes loaded with major histocompatibility complex class II binding aquaporin 4 antigen peptide
Authors: Muraki Yo , Nishimoto Yutaka , Yamasaki Midori , Miyakawa Shuuichi , Sato Shuji 
Published: February 2021

ABSTRACT
Autoimmune responses to aquaporin 4 (AQP4) cause neuromyelitis optica (NMO); thus, specific immunotolerance to this self-antigen could represent a new NMO treatment. We generated the liposome-encapsulated AQP4 peptide 201-220 (p201-220) to induce immunotolerance. Liposomes were generated using phosphatidylserine and the polyglycidol species PG8MG. The in vivo tissue distribution of the liposomes was tested using an ex vivo imaging system. To confirm the antigen presentation capacity of PG8MG liposomes, dendritic cells were treated with PG8MG liposome-encapsulated AQP4 p201-220 (AQP4-PG8MG liposomes). Immunotolerance induction by AQP4-PG8MG liposomes was evaluated using the ex vivo cell proliferation of lymph node cells isolated from AQP4 p201-220-immunized AQP4-deficient mice. Fluorescent dye-labeled PG8MG liposomes were distributed to the lymph nodes. AQP4 p201-220 was presented on dendritic cells. AQP4-PG8MG liposomes were tended to suppress immune responses to AQP4 p201-220. Thus, the encapsulation of AQP4 peptides in PG8MG liposomes represents a new strategy for suppressing autoimmune responses to AQP4.
Gene-set integrative analysis of multi-omics data using tensor-based association test
Authors: Chang Sheng-Mao , Yang Meng , Lu Wenbin , Huang Yu-Jyun , Huang Yueyang , Hung Hung , Miecznikowski Jeffrey C , Lu Tzu-Pin , Tzeng Jung-Ying 
Published: February 2021

Abstract

Motivation
Facilitated by technological advances and the decrease in costs, it is feasible to gather subject data from several omics platforms. Each platform assesses different molecular events, and the challenge lies in efficiently analyzing these data to discover novel disease genes or mechanisms. A common strategy is to regress the outcomes on all omics variables in a gene set. However, this approach suffers from problems associated with high-dimensional inference.

Results
We introduce a tensor-based framework for variable-wise inference in multi-omics analysis. By accounting for the matrix structure of an individual’s multi-omics data, the proposed tensor methods incorporate the relationship among omics effects, reduce the number of parameters, and boost the modeling efficiency. We derive the variable-specific tensor test and enhance computational efficiency of tensor modeling. Using simulations and data applications on the Cancer Cell Line Encyclopedia (CCLE), we demonstrate our method performs favorably over baseline methods and will be useful for gaining biological insights in multi-omics analysis.

Availability and implementation
R function and instruction are available from the authors’ website: https://www4.stat.ncsu.edu/~jytzeng/Software/TR.omics/TRinstruction.pdf.

Supplementary information
Supplementary data are available at Bioinformatics online.
Carryover effect of atrazine and its metabolite—from treated bovine spermatozoa to the embryo’s transcriptome†
Authors: Komsky-Elbaz A , Kalo D , Roth Z 
Published: February 2021

Abstract
Atrazine (ATZ) is an extensively used herbicide and ubiquitous environmental contaminant. ATZ and its metabolite, diaminochlorotriazine (DACT), cause several cellular and functional alterations in spermatozoa. We aimed to examine the effect of ATZ/DACT on spermatozoon DNA integrity, fertilization competence, embryonic development, and transcriptome profile of in vitro-produced embryos derived from fertilization with pre-exposed sperm.
Bovine spermatozoa exposed to ATZ (0.1 or 1 μM) or DACT (1 or 10 μM) during in vitro capacitation were used for in vitro fertilization of untreated oocytes. Cleavage and blastocyst-formation rates were evaluated 42 h and 7 days postfertilization, respectively. The association between DNA fragmentation and apoptosis (annexin V kit) was determined. Fertilization competence of annexin-positive (AV+) and annexin-negative (AV−) spermatozoa was examined. Microarray analysis was performed for 7-day blastocysts.
Intracytoplasmic sperm injection was performed with control (AV+, AV−) and DACT (AV+, AV−) spermatozoa. Cleavage rates did not differ between groups and blastocyst formation tended to be higher for AV− vs. AV+ in both control and DACT groups, suggesting that acrosome reaction, rather than DNA fragmentation, underlies the reduced cleavage. Transcriptomic analysis revealed 139 and 230 differentially expressed genes in blastocysts derived from ATZ- and DACT-exposed spermatozoa, respectively, relative to controls.
Proteomic analysis shown differential expression of proteins in ATZ- or DACT-treated spermatozoa, in particular proteins related to cellular processes and biological pathways. Therefore, we assume that factors delivered by the spermatozoa, regardless of DNA fragmentation, are also involved. Overall, the current study reveals a deleterious carryover effect of ATZ/DACT from the spermatozoa to the developing embryo.
A discrete bouncy particle sampler
Authors: Sherlock C , Thiery A H 
Published: February 2021

Summary
Most Markov chain Monte Carlo methods operate in discrete time and are reversible with respect to the target probability. Nevertheless, it is now understood that the use of nonreversible Markov chains can be beneficial in many contexts. In particular, the recently proposed bouncy particle sampler leverages a continuous-time and nonreversible Markov process, and empirically shows state-of-the-art performance when used to explore certain probability densities; however, its implementation typically requires the computation of local upper bounds on the gradient of the log target density. We present the discrete bouncy particle sampler, a general algorithm based on a guided random walk, a partial refreshment of direction and a delayed-rejection step. We show that the bouncy particle sampler can be understood as a scaling limit of a special case of our algorithm. In contrast to the bouncy particle sampler, implementing the discrete bouncy particle sampler only requires pointwise evaluation of the target density and its gradient. We propose extensions of the basic algorithm for situations when the exact gradient of the target density is not available. In a Gaussian setting, we establish a scaling limit for the radial process as the dimension increases to infinity. We leverage this result to obtain the theoretical efficiency of the discrete bouncy particle sampler as a function of the partial-refreshment parameter, which leads to a simple and robust tuning criterion. A further analysis in a more general setting suggests that this tuning criterion applies more generally. Theoretical and empirical efficiency curves are then compared for different targets and algorithm variations.