Results 41 to 50 of about 690,612 (290)

Electronic Structure Modulation Induced by Asymmetric Cu─Ni Centers in a π‐Conjugated Triazine MOF

Advanced Materials Interfaces, EarlyView.
A π‐conjugated H3TATB‐based asymmetric bimetallic CuNi‐MOF was developed as an efficient electrocatalyst for alkaline hydrogen evolution. Benefiting from synergistic Cu–Ni interactions, enhanced charge transfer, and stabilized active sites, CuNi‐MOF delivers superior HER performance with low overpotential, improved kinetics, and 24 h durability.
Alamgir, Raza Ullah, Nouraiz Mushtaq, Agasthiyaraj Lakshmanan, Abrar Ahmad, Xusheng Wang, Junbo Liang, Sailing He   +7 more
wiley   +1 more source

MODEL PENSKORAN PARTIAL CREDIT PADA BUTIR MULTIPLE TRUE-FALSE BIDANG FISIKA

Jurnal Penelitian dan Evaluasi Pendidikan, 2013
Tujuan penelitian ini menghasilkan model penskoran politomus untuk respons butir multiple true-false, sehingga dapat mengestimasi secara lebih akurat kemampuan di bidang fisika. Pengembangan penskoran menggunakan Four-D model dan diuji akurasinya melalui
Wasis Wasis
doaj  

Pricing Optimization for Inventory with Integrated Storage and Credit Constraints

Mathematics
Price is a pivotal determinant of market demand, as higher prices typically reduce sales while lower prices stimulate them. Thus, incorporating price-dependent demand into inventory models is both realistic and necessary.
Hui-Ling Yang, Chun-Tao Chang, Yao-Ting Tseng   +2 more
doaj   +1 more source

Diagnostic Classification Models for Ordinal Item Responses

Frontiers in Psychology, 2018
The purpose of this study is to develop and evaluate two diagnostic classification models (DCMs) for scoring ordinal item data. We first applied the proposed models to an operational dataset and compared their performance to an epitome of current ...
Ren Liu, Zhehan Jiang
doaj   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

DIAGNOSIS KESALAHAN SISWA BERBASIS PENSKORAN POLITOMUS MODEL PARTIAL CREDIT PADA MATEMATIKA

Jurnal Penelitian dan Evaluasi Pendidikan, 2013
Penelitian ini bertujuan untuk menemukan informasi diagnostik dari kesalahan jawaban peserta pada Ujian Nasional (UN) Matematika. Informasi diagnostik yang ditemukan meli-puti atribut yang mendasari butir soal, ketidaktuntasan atribut, dan jenis ...
Awal Isgiyanto
doaj  

Utilizing item response theory for the analysis of self-regulated learning scale in mathematics

Jurnal Elemen
In the learning process, students must be able to regulate themselves. This is an effort to improve the quality of student learning, especially their learning achievement.
Sintha Sih Dewanti, Jasmine Nurul Izzah, Shinta Puspa Kiranasari, Kholifatul Fatoni Sholihin   +3 more
doaj   +1 more source

A multi-cycle inventory control model for deteriorating items with partial backlogging under trade credit

Frontiers in Applied Mathematics and Statistics, 2022
The finite horizon should be considered for products with a limited lifecycle. To introduce this possibility, multiple orders and partial backlogging policies are established under trade credit in an inventory model, where demand is a time-varying ...
Zhonghui Li, Zhonghui Li, Panida Chamchang, Lili Niu, Jiangtao Mo   +4 more
doaj   +1 more source

Optimal Grazing Exclusion Duration to Enhance Soil Carbon Sequestration in Degraded Grasslands

Advanced Science, EarlyView.
Across China, grazing exclusion reaches the national mean soil organic carbon recovery benchmark sooner in high‐MAP regions (> 500 mm), but recovery is much slower where MAP < 300 mm. Scaling this strategy to 70% of China's degraded grasslands would sequester about 1.52 Pg of soil carbon over 10 years—roughly 17% of annual global fossil‐fuel emissions.
Bin Zhang, Chongzhi Sun, Dongmei Xue, Paul Christiaan Struik, Tongrui Zhang, Jiayue Liu, Tingting Xing, Ziyang Liu, Shiming Tang, Ke Jin   +9 more
wiley   +1 more source

The Developing of Creative Thinking Skills Test Based on Modern Test Theory in Physics of Senior High Schools

Cakrawala Pendidikan: Jurnal Ilmiah Pendidikan, 2018
: In general, a test was developed based on classical test theory which had many weaknesses, therefore the test in this research was developed based on modern test theory (Item Response Theory). This study aimed to develop a Creative Thinking Skills test
Edi Istiyono, Wipsar Brams Dwandaru, Farida Rahayu   +2 more
doaj   +1 more source