bluuebunny/crossref_metadata_2025_split huggingface dataset:
Stable isotope values (δ
13C, δ
15N) of macroalgal communities at Loch Creran and its relevance for elucidating sources of macroalgal organic carbon in fjordic sedimentary systems
Authors: Bebb Alexander , Hawkins Imogen , Gwynne-Jones Richard , Helmore Ruth , Witte Ursula 
Published: October 2023

Abstract
Here, macroalgal isotopic values from Loch Creran, Western Scotland, were documented to determine the suitability of paired stable isotope analysis for identifying macroalgal-derived organic carbon sources in a fjordic sea loch. Variability in isotopic values (δ
13C and δ
15N) was evident within individual thalli of fucoid and kelp species, at the replicate level and between sampling localities. There were few consistent phylogenetic correlates in the isotopic values of macroalgae. The δ
13C ranges did, however, provide insight into differentiating between carbon sources more broadly, such as terrestrial from marine and between macrophyte lineages. As such, δ
13C could be indicative of the presence of macroalgal carbon sources within pools of organic matter but will likely be ineffective at separating these sources to lower taxonomic levels. Consequently, if these data are used alone to discriminate between macroalgal carbon sources and their relative contribution to a sedimentary pool of organic matter, the development of accurate conclusions will be challenging. The findings presented here demonstrate the need for complementary techniques or multi-tracer approaches to aid in the differentiation between macroalgal carbon sources to lower taxonomic levels rather than relying on stable isotopes as a biomarker alone.
RCD*(K,N) spaces are semi-locally simply~connected
Authors: Wang Jikang 
Published: October 2023

Abstract
It was shown in [A. Mondino and G. Wei,
On the universal cover and the fundamental group of an

RCD
*

⁢

(
K
,
N
)

{\rm RCD}^{*}(K,N)

-space,
J. reine angew. Math. 753 2019, 211–237]
that any

RCD
*

⁢

(
K
,
N
)

{\mathrm{RCD}^{*}(K,N)}

space

(
X
,
d
,
𝔪
)

{(X,d,\mathfrak{m})}

has a universal cover. We prove that for any point

x
∈
X

{x\in X}

and

R
>
0

{R>0}

, there exists

r
<
R

{r<R}

such that any loop in

B
r

⁢

(
x
)

{B_{r}(x)}

is contractible in

B
R

⁢

(
x
)

{B_{R}(x)}

; in particular, X is semi-locally simply connected and the universal cover of X is simply connected. This generalizes the earlier work in [J. Wang, Ricci limit spaces are semi-locally simply connected, preprint 2021] that any Ricci limit space is semi-locally simply connected.
Normalized solutions for scalar field equation involving multiple critical nonlinearities
Authors: Feng Xiaojing , Liu Haidong 
Published: October 2023

Abstract
This paper concerns the scalar field equation

-

Δ
⁢
u

=

λ
⁢
u

+

|
u
|

q
-
2

⁢
u

+

a
⁢

|
u
|

4

⁢
u

+

b
⁢

(

I
2

∗

|
u
|

5

)

⁢

|
u
|

3

⁢
u

in
⁢

ℝ
3

-\Delta u=\lambda u+|u|^{q-2}u+a|u|^{4}u+b(I_{2}\ast|u|^{5})|u|^{3}u\quad\text%
{in }\mathbb{R}^{3}

under the normalized constraint

∫

ℝ
3

u
2

⁢

𝑑
x

=

c
2

{\int_{\mathbb{R}^{3}}u^{2}\,dx=c^{2}}

, where

a
,
b
,
c

>
0

{a,\,b,\,c>0}

,

2
<
q
<

10
3

{2<q<\frac{10}{3}}

and

I
2

{I_{2}}

is the Riesz potential. We
prove that for small prescribed mass c the above equation has a
positive ground state solution and an infinite sequence of normalized
solutions with negative energies tending to zero. Asymptotic properties
of ground state solutions as

a
→

0
+

{a\to 0^{+}}

and as

b
→

0
+

{b\to 0^{+}}

are also studied.
New approach on the study of operator matrix
Authors: Marzouk Ines , Walha Ines 
Published: October 2023

Abstract
In the present paper, a new technique is presented to
study the problem of invertibility of unbounded block

3
×
3

{3\times 3}

operator matrices defined with diagonal domain.
Sufficient criteria are established to guarantee our interest and to prove some interaction between such a model of an operator matrix and its diagonal operator entries.
The effectiveness of the
proposed new technique is shown by a physical example of an integro differential equation
named the neutron transport equation with partly elastic collision operators.
In particular, the obtained results answer the question in [H. Zguitti,
A note on Drazin invertibility for upper triangular block operators,
Mediterr. J. Math. 10 2013, 3, 1497–1507]
and the conjecture in [A. Bahloul and I. Walha,
Generalized Drazin invertibility of operator matrices,
Numer. Funct. Anal. Optim. 43 2022, 16, 1836–1847].
Enoch’s Green Apocalypse: The Source Material of Aronofsky’s Noah
Authors: Waddell Robby 
Published: October 2023

Abstract
A cataclysmic event, often spelling disaster for the environment, is an essential element to the backstory of any post-apocalyptic tale. In these stories, the presupposed ecological tragedy may have severely altered the environment, but it has not annihilated it. In fact, what has happened is that the apocalyptic catastrophe has neutralized the ecological threats that were the original catalysts for the devastation in the first place, resulting in an opportunity for the environment to rebound once its abusers have faced judgment. In other words, Earth may get beaten black-and-blue, yet the final effect is a green apocalypse—an event that rids Earth of its destructive inhabitants or at least counterbalances their negative effects, giving the global ecosystem a chance to renew. In this article I offer readings of two apocalyptic stories—1 Enoch and Darren Aronofsky’s Noah. My approach to these stories utilizes elements from a method of ecological hermeneutics that has been developed by Norman Habel and others from the Earth Bible team. The Noahic flood story is one of the earliest examples of a “green” apocalypse, in which the penultimate event may have been devastation on the planet, but the ultimate end was a renewal of Earth. It is my hope that these ecological readings with their attention to the concept of a green apocalypse may be useful in appreciating the possibility of eco-friendly interpretations of apocalyptic texts.
Traveling wave solutions of the generalized scale-invariant analog of the KdV equation by tanh–coth method
Authors: González-Gaxiola Oswaldo , Ruiz de Chávez Juan 
Published: October 2023

Abstract
In this work, the generalized scale-invariant analog of the Korteweg–de Vries equation is studied. For the first time, the tanh–coth methodology is used to find traveling wave solutions for this nonlinear equation. The considered generalized equation is a connection between the well-known Korteweg–de Vries (KdV) equation and the recently investigated scale-invariant of the dependent variable (SIdV) equation. The obtained results show many families of solutions for the model, indicating that this equation also shares bell-shaped solutions with KdV and SIdV, as previously documented by other researchers. Finally, by executing the symbolic computation, we demonstrate that the used technique is a valuable and effective mathematical tool that can be used to solve problems that arise in the cross-disciplinary nonlinear sciences.
A switch from ferro- to antiferromagnetic ordering in the solid solutions CeAuGe1−x
Sn
x
Authors: Reimann Maximilian Kai , Pröbsting Wilma , Koldemir Aylin , Palms Jana , Pöttgen Rainer 
Published: October 2023

Abstract
CeAuGe and CeAuSn (both NdPtSb type, space group P63
mc) form a complete solid solution CeAuGe1−x
Sn
x
with Vegard-type behavior of the cell volume. Samples with steps of x = 0.1 were synthesized from the pure elements by arc-melting. The structure of CeAuGe0.13(2)Sn0.87(2) was refined from single-crystal X-ray diffractometer data: a = 469.10(6), c = 773.90(10) pm, wR
2 = 0.0359, 251 F
2 values and 12 variables. The induced structural disorder caused by the Ge/Sn mixing affects the magnetic ground state of the cerium ions. From the germanium-rich side, the Curie temperature of CeAuGe (10.0 K) decreases towards CeAuGe0.6Sn0.4, while the Néel temperature of CeAuSn (4.4 K) decreases at the tin-rich side toward CeAuGe0.4Sn0.6. The switch of the magnetic ground state occurs approximately around the Ge/Sn ratio of 1:1. 119Sn Mössbauer spectra of CeAuGe0.1Sn0.9 and CeAuGe0.7Sn0.3 confirm the presence of single crystallographic tin sites in both cases, and the isomer shifts are comparable to that of pure CeAuSn, indicating similar electron density distribution at the tin nuclei.
Hyperexcitability in the Olfactory Bulb and Impaired Fine Odor Discrimination in theFmr1KO Mouse Model of Fragile X Syndrome
Authors: Kuruppath Praveen , Xue Lin , Pouille Frederic , Jones Shelly T. , Schoppa Nathan E. 
Published: October 2023

Fragile X syndrome (FXS) is the single most common monogenetic cause of autism spectrum disorders (ASDs) in humans. FXS is caused by loss of expression of the fragile X mental retardation protein (FMRP), an mRNA-binding protein encoded on the X chromosome involved in suppressing protein translation. Sensory processing deficits have been a major focus of studies of FXS in both humans and rodent models of FXS, but olfactory deficits remain poorly understood. Here, we conducted experiments in wild-type (WT) andFmr1knock-out (KO;Fmr1-/y) mice (males) that lack expression of the gene encoding FMRP to assess olfactory circuit and behavioral abnormalities. In patch-clamp recordings conducted in slices of the olfactory bulb, output mitral cells (MCs) inFmr1KO mice displayed greatly enhanced excitation under baseline conditions, as evidenced by a much higher rate of occurrence of spontaneous network-level events known as long-lasting depolarizations (LLDs). The higher probability of spontaneous LLDs (sLLDs), which appeared to be because of a decrease in GABAergic synaptic inhibition in glomeruli leading to more feedforward excitation, caused a reduction in the reliability of stimulation-evoked responses in MCs. In addition, in a go/no-go operant discrimination paradigm, we found thatFmr1KO mice displayed impaired discrimination of odors in difficult tasks that involved odor mixtures but not altered discrimination of monomolecular odors. We suggest that theFmr1KO-induced reduction in MC response reliability is one plausible mechanism for the impaired fine odor discrimination.SIGNIFICANCE STATEMENTFragile X syndrome (FXS) in humans is associated with a range of debilitating deficits including aberrant sensory processing. One sensory system that has received comparatively little attention in studies in animal models of FXS is olfaction. Here, we report the first comprehensive physiological analysis of circuit defects in the olfactory bulb in the commonly-usedFmr1knock-out (KO) mouse model of FXS. Our studies indicate thatFmr1KO alters the local excitation/inhibition balance in the bulb, similar to whatFmr1KO does in other brain circuits, but through a novel mechanism that involves enhanced feedforward excitation. Furthermore,Fmr1KO mice display behavioral impairments in fine odor discrimination, an effect that may be explained by changes in neural response reliability.
Analyzing the Emergence of Social Media as a Sustainable Tool for Learning English in the Post-Pandemic Era
Authors: Jamshed Mohammad , Almashy Abduh , Alam Iftikhar , Banu Sameena 
Published: October 2023

The study aims to investigate Saudi ESL learners' attitudes toward utilizing social media as a sustainable tool of learning and their experience of learning and teaching with social media integration in ESL classrooms. In addition, it seeks to understand if the learners differ in their attitudes toward social media due to the differences in their demographic profiles. Using a simple random sampling method, 288 students were selected from the total population comprising different levels of the graduate program at Business College, Prince Sattam bin Abdulaziz University. Data were collected through a questionnaire and quantitative analysis was applied. Descriptive statistics and one-way ANOVA were employed to address the research questions. The study demonstrated that Saudi ESL learners differ in their perspectives on social media based on their parents' profession but not based on the gender and education of parents. The study suggests that promoting social media and its integration in ESL classrooms can play a vital role in academic empowerment, enhancement of language proficiency, and self-regulated learning of Saudi ESL learners who are eager to enter the ever-expanding job market in the kingdom.
El nuevo institucionalismo y la concepción representacionalista de la política
Authors: Pereyra Guillermo 
Published: October 2023

El principal objetivo de este ensayo consiste en criticar los supuestos representacionalistas de algunos trabajos de la corriente neo institucionalista de la política. Se sostienen dos tesis fundamentales: 1) la crítica del modelo institucionalista de la democracia a la noción de soberanía popular no tiene en cuenta que el pueblo es una categoría política que muestra el fracaso constitutivo de toda representación; 2) la teoría neoinstitucionalista, en particular en su vertiente histórico–sociológica, se basa en el supuesto representacionalista de que hay algo previo a lo político en la sociedad o en la cultura que debe ser fielmente representado por las instituciones para evitar el desorden.
Reflexiones italianas sobre el subdesarrollo. La revolución liberal de Piero Gobetti
Authors: Varela Petito Gonzalo 
Published: October 2023

Este artículo presenta al lector latinoamericano el pensamiento del liberal italiano Piero Gobetti (Turín 1900–París 1926), quien fuera amigo cercano de Antonio Gramsci y uno de los principales inspiradores del peruano José Carlos Mariátegui. Su libro más significativo, La Rivoluzione Libéralehabía permanecido hasta fechas recientes inédito en castellano, no obstante que Gobetti concibió ideas que —como entendió Mariátegui— pueden servir también al análisis de las formaciones latinoamericanas. Su liberalismo "movimientista", influido por la Revolución rusa y el pensamiento de filósofos como Georges Sorel, Gaetano Mosca, Benedetto Croce y Henri Bergson, contiene rasgos de acusada originalidad. En política, su mayor preocupación fue impulsar la formación de una nueva clase dirigente. A efectos de una mejor comprensión, el estudio de sus ideas se aborda aquí en contraste con las de Gramsci y Mariátegui.AbstractThis article presents to the readers in Latin America the thought of the Italian liberal writer and politician Piero Gobetti (Torino 1900–Paris 1926) who was a close friend of Antonio Gramsci and one of the main intellectual influences on the work of the marxist peruvian thinker José Carlos Mariátegui. His most relevant book, La Rivoluzione Libérale, was translated into Spanish only recently but —as Mariátegui understood— some of Gobetti's ideas are very relevant to an analysis of Latin American socialformations. His very original "movement oriented" liberalism was influenced by the Russian revolution as well as by philosophers like Georges Sorel, Gaetano Mosca, Benedetto Croce and Henri Bergson.Gobetti's major concern in politics was to promote the emergence of a new ruling class. For a better comprehension of his thought, Gobetti's ideas are here compared with those of Gramsci and Mariátegui.
Dampak Psikologis terkait Relasi Individu Dewasa Awal yang Mengalami Perceraian Orang Tua
Authors: Ainina Habibatul , Wulandari Primatia Yogi 
Published: October 2023

Dampak perceraian lebih banyak memengaruhi aspek psikologis pada anak dan terus dirasakan hingga dewasa. Keberhasilan individu dewasa awal dalam menjalin relasi untuk menyelesaikan tugas perkembangan dipengaruhi oleh kognisi dan atribusi mereka atas hubungan romantis yang dibentuk berdasarkan persepsi atas hubungan orang tua mereka. Peneliti menggunakan metode narrative review untuk mengetahui dampak psikologis terkait relasi individu dewasa awal yang mengalami perceraian orang tua. Penelitian menemukan bahwa perceraian memberikan dampak positif dan negatif terhadap kondisi psikologis anak sehingga memengaruhi keberhasilan dalam menjalin relasi untuk menyelesaikan tugas perkembangan dewasa awal terkait intimacy vs isolation. Sangat penting untuk meneliti lebih lanjut terkait dinamika dan faktor-faktor apa saja saja yang memengaruhi keberhasilan pembentukan relasi supaya individu dengan pengalaman perceraian orang tua dapat menyelesaikan tugas perkembangannya secara optimal.
Impact of Financial Development Shocks on Renewable Energy Consumption in Saudi Arabia
Authors: Elzaki Raga M. 
Published: October 2023

The demand for renewable energy is increasing globally due to concerns about climate change, pollution, and the finite nature of fossil fuel resources, as renewable energy has been recognized as a significant factor in realizing sustainable development. The government of Saudi Arabia adopted the reduction of fossil fuel subsidies policy as a financial motivation for supporting both the production and consumption of fossil fuels. Therefore, this study aims to investigate the influence and shocks of Saudi’s financial development indicators on renewable energy consumption (REC). And to examine the track of causality between financial development indicators and REC. The study covers the annual data period of 1990-2021 and applies the Basic Vector Autoregressive model (VAR), Granger causality test, forecast error variance decomposition (FEVD), and impulse response function (IRF). The results imply that the financial development indicators have a significant positive impact on REC. The results of causality between REC and financial development indicators were conflicting. The results reveal that REC variation is explained by its innovative shocks and has a positive response to shocks in financial development. Authorities can encourage investment in renewable energy consumption by providing financial incentives also the governments can foster national and international partnerships between investors, policymakers, and industry stakeholders. Employing different determinants of financial development indicators and incorporating population factors in the REC function will be highly recommended for forming the renewable energy demand in Saudi Arabia.
Analisis Motivasi Belajar Peserta Didik Melalui Pembelajaran Jarak jauh Pada Mata Pelajaran Geografi Kelas XI IPS 2 SMA Negeri 2 Klaten
Authors: Urrochman Agusta Aulia , Wardhani Puspita Indra 
Published: October 2023

Abstrak: Pembelajaran jarak jauh menjadi sesuatu yang baru dalam sistem pendidikan di Indonesia. Hal tersebut tentu membutuhkan adaptasi dan penyesuaian baik bagi pendidik maupun peserta didik. Pembelajaran jarak jauh sebagai solusi yang dilaksanakan selama pandemi tentunya tidak berjalan secara mulus tanpa kendala. Masalah yang muncul tersebut akan berakibat pada menurunnya semangat belajar dan motivasi belajar peserta didik. Penelitian ini bertujuan untuk mengetahui motivasi belajar peserta didik dalam pembelajaran jarak jauh pada mata pelajaran geografi. Penelitian ini menggunakan pendekatan deskriptif kualitatif. Informan dalam penelitian terdiri atas informan kunci yaitu guru mata pelajaran geografi, informan utama yaitu peserta didik, dan informan pendamping yaitu wali murid dan wali kelas. Teknik pengumpulan data yang digunakan yaitu teknik wawancara, observasi, dan studi dokumenter. Teknik analisis data menggunakan teknik kualitatif yang terdiri atas reduksi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian diperoleh bahwa motivasi belajar peserta didik mengalami penurunan setelah diterapkan pembelajaran jarak jauh pada mata pelajaran geografi. Oleh karena itu, diharapkan guru dan peserta didik bisa beradaptasi dengan kondisi pandemi yang sedang terjadi, sehingga guru dapat menyampaikan pembelajaran dengan baik dan peserta didik dapat termotivasi untuk belajar secara optimal.

Kata kunci: motivasi belajar, pembelajaran geografi, pembelajaran jarak jauh.
Partisipasi Masyarakat dalam Menjaga Kualitas Lingkungan Permukiman di Kelurahan Bandungrejosasi Kecamatan Sukun Kota Malang
Authors: Bwarlele Norberta , Kurniawati Dwi , Meviana Ika 
Published: October 2023

Masyarakat merupakan salah satu aktor pembangunan, yang memiliki peran penting dalam menentukan kualitas lingkungan, baik sikap maupun perilaku masyarakat yang membawa dampak terhadap kualitas lingkungan permukiman. Tujuan dalam penelitian ini, untuk: (1) mengidentifikasi bentuk partisipasi masyarakat dalam meningkatkan kualitas lingkungan permukiman dikelurahan Bandungrejosari, (2) mengidentifikasi kualitas lingkungan permukiman yang ada dikelurahan Bandungrejosari, (3) mengidentifikasii faktor yangg memperngaruhi partisipasii masyarakatt dalam meningkatkan kualitass lingkungann permukimann dikelurahan Bandungrejosari. Metode yang digunakan oleh peneliti adalah kualitatif dan jenis penelitiannya adalah deskriptif. Sumber data dalam penelitian ini adalah data primer diperoleh dari hasil wawancara, dan data skunder diperoleh dari dokumentasi. Teknik pengumpulan data yang digunakan oleh peneliti yaitu observasi, wawancara dan dokumentasi. Analisis data yang digunakan yaitu kualitatif yang bersifat deskriptif.
Hasil penelitian dapat disimpulan bahwa bentuk partisipasi masyarakat yaitu partisipasi dalam bentuk tenaga, harta/benda, keahlian/ketrampilan dan bentuk uang, indikator kualitas lingkungan permukiman dari indikator banjir dikategorikan jelek, sedangkan indikator lainnya seperti air bersih/air minum, sampah, dikategorikan baik. Dan faktorr yangg mempengaruhii partispasi masyarakatt yaitu pendapatan, ketersediaann saranaa prasarana peran tokoh masyarakat, sangat berpengaruh dalam menjaga kualitas lingkunagan permukiman. Pada pihak kelurahan penulis menyarankan agar memberikan sosialisasi dan penyuluhan bagi masyarakat untuk memecahkan masalah sosial atau gejala-gejala sosial yang terdapat disekitar lingkungan masyarakat agar tingkat partisipasi meningkat dalam menjaga kualitas lingkungan permukiman. Pada masyarakat penulis menyarankan untuk selalu memperhatihan kebersihan sekitar aliran sungai dengan tidak membuang sampah sembarangan dan untuk mengatasi banjir yang sering terjadi dilokasi penelitian.
Is Handling Gas in the Riser a Safe Alternative? Exploring the Limits and Opportunities for Safer Kick Handling During Deepwater Drilling
Authors: Gabaldon O. , Humphreys G. , Teixeira M. L. , Gonzalez-Luis R. A. , Souza P. 
Published: October 2023

Abstract
This work complements previous efforts exploring the opportunity for safer return to operations after an influx event in deepwater drilling operations when an MPD system is installed on the floating rig. Additionally, even kicks taken during conventional drilling, with rigs equipped with adequate RGH equipment, can benefit from an alternative way to address the event. An RGH Envelope is proposed, which can be incrementally adopted in a stepwise approach. For MPD operations, influxes greater than IME circulation limits, but within RGH Envelope limits, can be introduced into the riser and then removed using the Fixed Choke, Constant Output (FCCO) method. In non-MPD operations, all influxes need to be initially addressed by shutting the well on the BOP as soon as possible. Then, for influxes within the equivalent MPD IME limits, the surface RGH system can be engaged and routed to the rig choke, and the influx is completely circulated using Driller's method through the riser system. A potential expansion of this method, for influxes exceeding the original IME limits, but within RGH Envelope limits, can be circulated into the riser and then finalized by using FCCO method. For conventional drilling operations without a rotating control device (RCD) seal installed, consideration should be given to installing the seal assembly in the RCD prior to circulating hydrocarbons to surface with an open BOP. The authors explore the RGH Envelope limits and present guidelines for a comprehensive risk assessment on RGH process, limits, and how it impacts multiple aspects of the operations.