PENGEMBANGAN MEDIA PEMBELAJARAN MIT APP INVENTOR BERPLATFORM ANDROID PADA MATERI STOIKIOMETRI DI KELAS X MIPA SMAN 7 KOTA BENGKULU

This study aims to test the feasibility of learning media and determine student responses to the developed learning media. This type of research is research and development using a development model adapted from the Borg & Gall model, namely: 1) Potential and Problems, 2) Data Collection, 3) Product Design, 4) Design Validation, 5) Design Improvement, 6) Product Trial, 7) Product Revision, 8) Usage Trial, 9) Product Revision, and 10) Mass Product Manufacturing. But in this research, the research stages are limited to the sixth step namely the product trial stage. The research instruments used were interview sheet with chemistry teachers, questionnaires sheet to validate learning media and student response questionnaires to the developed media. The research was conducted at Bengkulu University and at SMAN 7 Bengkulu City with a research sample of 36 students of class X MIPA 4. From the research results obtained from learning media according to material expert validators is 88.75% and according to media expert validators is 90.90%. The average percentage of the feasibility of the learning media developed is 89.825%, so based on the results of validation by all validators, it is stated "Very Valid". Based on the results of product trials, the results of student responses in class to the MIT App Inventor learning media on stoichiometry material obtained a percentage of 89.27% ​​which was included in the very good category. The results of this study indicate that the MIT App Inventor learning media on stoichiometric material that has been developed is very feasible to use and feasible to be applied to the learning processPenelitian ini bertujuan untuk menguji kelayakan media pembelajaran dan mengetahui respon siswa terhadap media pembelajaran yang dikembangkan. Jenis penelitian ini merupakan penelitian dan pengembangan menggunakan model pengembangan yang diadaptasi dari model Borg & Gall yaitu: 1) Potensi dan Masalah, 2) Pengumpulan Data, 3) Desain Produk, 4) Validasi Desain, 5) Perbaikan Desain, 6) Uji Coba Produk, 7) Revisi Produk, 8) Uji coba pemakaian, 9) Revisi Produk, dan 10) Pembuatan Produk Masal. Tetapi pada penelitian ini, tahapan penelitian dibatasi sampai langkah ke-6 yaitu tahap uji coba produk. Instrumen penelitian yang digunakan berupa lembar wawancara kepada guru kimia, lembar angket untuk validasi media pembelajaran dan lembar angket respon siswa terhadap media yang dikembangkan. Penelitian dilakukan di Universitas Bengkulu dan di SMAN 7 Kota Bengkulu dengan sampel penelitian yaitu 36 siswa kelas X MIPA 4. Dari hasil penelitian diperoleh tingkat kelayakan media pembelajaran menurut validator ahli materi yaitu 88,75% dan menurut validator ahli media yaitu 90,90%. Persentase rata-rata  tingkat kelayakan media pembelajaran yang dikembangkan yaitu 89,825% sehingga berdasarkan hasil validasi oleh semua validator dinyatakan “Sangat Valid”. Berdasarkan hasil uji coba produk, hasil respon siswa di kelas terhadap media pembelajaran MIT App Inventor pada materi stoikiometri memperoleh persentase 89,27% yang termasuk kategori sangat baik. Hasil penelitian ini menunjukkan media pembelajaran MIT App Inventor pada materi stoikiometri yang telah dikembangkan sangat layak digunakan dan layak diterapkan pada proses pembelajara

Sustainable humanitarian supply chains: a systematic literature review and research propositions

The purpose of this systematic review is to synthesise the body of knowledge related to sustainable humanitarian supply chains across disaster relief as well as those of logistics of development aid. The output of this paper is a set of research propositions that will help advance theory building and validation for the management of sustainable humanitarian supply chains. This systematic review identifies and categorises sustainable humanitarian supply chain management (SHSCM) themes, with a particular emphasis on theoretical development based on a categorical analysis of research articles. The thematic analysis reveals that sustainability in humanitarian supply chains encompasses a wide range of aspects, such as supply network configuration, coordination, and partnership, as well as performance measurement. However, theoretical studies typically do not integrate all sustainability dimensions. In particular, social sustainability factors are largely absent from current models of SHSCM, despite their inherent significance in humanitarian contexts. The categorical analysis explains how aspects related to the identified themes impact and pose opportunities for SHSCM. Insights from this systematic review can support humanitarian supply chain sustainability knowledge with policy-driven research directions. These policies can help achieve a greater level of sustainability in humanitarian supply chain management. The originality of this study lies in the development of detailed categories of sustainability studies, in its analytical focus on SHSCM theories, and in the development of research propositions to provide insights to researchers on how to advance theory and conduct impactful research on the topic of SHSCM

Longitudinal Measurement of Service Quality in Information Systems: A Case Study

Using SERVQUAL, IS service quality was measured twice, at a one year interval, in a large accounting and information management consulting firm. After the first measurement, IS management used the results to initiate several actions to improve service quality. The second measurement indicated that service quality improved. The managerial actions that preceded the increase in service quality are reported and discussed

COVID-19 vaccination hesitancy and associated factors among the business community in Lira City, Uganda: a cross-sectional research

Background: As of November 26, 2021, at least seven different vaccines across three platforms have been distributed globally. These vaccines include Pfizer/BioNTech released on December 31, 2020, AstraZeneca on February 16, 2021, Janssen by Johnson and Johnson on March 12, 2021, Moderna on April 30, 2021, Sinopharm on May 7, 2021, Sinovac CoronaVac on July 1, 2021, and COVAXIN on November 3, 2021. Despite this unprecedented scientific discovery, vaccine hesitancy is seen as a stumbling block towards achieving herd immunity in the battle to control this global pandemic. The effectiveness of vaccines has been based on the principle that the community was willing to take up the vaccine to achieve herd immunity. This study aimed to assess COVID-19 vaccination hesitancy and associated factors among the business community in Lira City, Uganda.Methods: Descriptive cross-sectional design was conducted among the business community from Lira City in Northern Uganda. The sample size was 421, however, only 407 members of the business community who responded were included in the analysis.Results: Of the 407 participants, 57.3% were females, 52.5% were married, 88.4% were Langi by Tribe, 43.5% had tertiary education, 33.4% were Anglicans, and 40.1% were market vendors. Results also show that about 32.3% of the respondents had either delayed or refused to take the COVID-19 vaccine. The correlates of vaccination hesitance were education level (aOR; 3.63, 95%CI; 1.49-8.79, p=0.04), having a chronic medical condition (aOR; 2.7, 95%CI; 1.39-5.38, p=0.04) and certainty in the COVID-19 vaccines (aOR; 0.27, 95%CI; 0.017-0.51, p=0.02). Respondents who had primary level education had a more than 2-fold increased odds of acceptance of COVID-19 vaccination compared to those who had not attained any formal education. Individuals who had chronic medical conditions had more than 2-fold increased odds of accepting the COVID-19 vaccine compared to those who did not have any chronic medical conditions. Those who were certain about the COVID-19 vaccine were 73% less likely to hesitate vaccination as compared to their counterparts who were uncertain. Conclusion: The study found a substantially high level of COVID-19 vaccination hesitancy in Lira City and its predictors were level of education, chronic medical conditions and certainty in COVID-19 vaccines. For this reason, it is important to raise awareness among the business community about the vaccine. To increase uptake, policymakers and other stakeholders need to create effective communication techniques for behavior change

Beyond production: Brain responses during speech perception in adults who stutter

AbstractDevelopmental stuttering is a speech disorder that disrupts the ability to produce speech fluently. While stuttering is typically diagnosed based on one's behavior during speech production, some models suggest that it involves more central representations of language, and thus may affect language perception as well. Here we tested the hypothesis that developmental stuttering implicates neural systems involved in language perception, in a task that manipulates comprehensibility without an overt speech production component. We used functional magnetic resonance imaging to measure blood oxygenation level dependent (BOLD) signals in adults who do and do not stutter, while they were engaged in an incidental speech perception task. We found that speech perception evokes stronger activation in adults who stutter (AWS) compared to controls, specifically in the right inferior frontal gyrus (RIFG) and in left Heschl's gyrus (LHG). Significant differences were additionally found in the lateralization of response in the inferior frontal cortex: AWS showed bilateral inferior frontal activity, while controls showed a left lateralized pattern of activation. These findings suggest that developmental stuttering is associated with an imbalanced neural network for speech processing, which is not limited to speech production, but also affects cortical responses during speech perception

Utilization of a novel digital measurement tool for quantitative assessment of upper extremity motor dexterity: a controlled pilot study.

BackgroundThe current methods of assessing motor function rely primarily on the clinician's judgment of the patient's physical examination and the patient's self-administered surveys. Recently, computerized handgrip tools have been designed as an objective method to quantify upper-extremity motor function. This pilot study explores the use of the MediSens handgrip as a potential clinical tool for objectively assessing the motor function of the hand.MethodsEleven patients with cervical spondylotic myelopathy (CSM) were followed for three months. Eighteen age-matched healthy participants were followed for two months. The neuromotor function and the patient-perceived motor function of these patients were assessed with the MediSens device and the Oswestry Disability Index respectively. The MediSens device utilized a target tracking test to investigate the neuromotor capacity of the participants. The mean absolute error (MAE) between the target curve and the curve tracing achieved by the participants was used as the assessment metric. The patients' adjusted MediSens MAE scores were then compared to the controls. The CSM patients were further classified as either "functional" or "nonfunctional" in order to validate the system's responsiveness. Finally, the correlation between the MediSens MAE score and the ODI score was investigated.ResultsThe control participants had lower MediSens MAE scores of 8.09%±1.60%, while the cervical spinal disorder patients had greater MediSens MAE scores of 11.24%±6.29%. Following surgery, the functional CSM patients had an average MediSens MAE score of 7.13%±1.60%, while the nonfunctional CSM patients had an average score of 12.41%±6.32%. The MediSens MAE and the ODI scores showed a statistically significant correlation (r=-0.341, p<1.14×10⁻⁵). A Bland-Altman plot was then used to validate the agreement between the two scores. Furthermore, the percentage improvement of the the two scores after receiving the surgical intervention showed a significant correlation (r=-0.723, p<0.04).ConclusionsThe MediSens handgrip device is capable of identifying patients with impaired motor function of the hand. The MediSens handgrip scores correlate with the ODI scores and may serve as an objective alternative for assessing motor function of the hand

Postoperative complications of combined phacoemulsification and pars plana vitrectomy in diabetic retinopathy patients

PurposeTo compare intra- and postoperative complications in combined phacoemulsification and pars plana vitrectomy surgeries performed in patients with non-proliferative diabetic retinopathy (NPDR) vs. proliferative diabetic retinopathy (PDR). MethodsRetrospective, case series of patients with diabetic retinopathy who underwent combined phacovitrectomy surgery between 2008 and 2017. We compared intraoperative complications including posterior capsular rupture and retinal tear, and postoperative complications including corneal edema, macular edema (ME), epiretinal membrane (ERM), neovascular glaucoma and persistent inflammation. ResultsA total of 104 eyes of 104 patients were included in this study. Twenty-four eyes (23.1%) were categorized as NPDR and 80 eyes (76.9%) as PDR. The most common indications for surgery in the NPDR group were ERM (67%) and rhegmatogenous retinal detachment (12.5%), while in the PDR group, indications were vitreous hemorrhage (56%) and tractional retinal detachment (19%). The most common intraoperative complication was retinal tear (8% in NPDR and 19% in PDR, p = 0.195) and postoperative complication was ME (29% in NPDR and 26% in PDR, p = 0.778). There were no statistically significant differences in intra- and postoperative complication rates between the NPDR and PDR groups, even after adjusting for confounders; patient age at surgery and indication for surgery. ConclusionAfter combined phacovitrectomy in NPDR and PDR patients, new-onset ME was found in about a quarter of eyes in both groups. Intraoperative anti-VEGF or steroid administration, and intense postoperative anti-inflammatory medication and follow-up should be regarded after phacovitrectomy regardless of the DR level.Peer reviewe

Disrupting drive-by download networks on Twitter.

This paper tests disruption strategies in Twitter networks contain-ing malicious URLs used in drive-by download attacks. Cybercriminals usepopular events that attract a large number of Twitter users to infect andpropagate malware by using trending hashtags and creating misleading tweetsto lure users to malicious webpages. Due to Twitter’s 280 character restric-tion and automatic shortening of URLs, it is particularly susceptible to thepropagation of malware involved in drive-by download attacks. Consideringthe number of online users and the network formed by retweeting a tweet, acybercriminal can infect millions of users in a short period. Policymakers andresearchers have struggled to develop an efficient network disruption strategyto stop malware propagation effectively. We define an efficient strategy as onethat considers network topology and dependency on network resilience, whereresilience is the ability of the network to continue to disseminate informationeven when users are removed from it. One of the challenges faced while curbingmalware propagation on online social platforms is understanding the cyber-criminal network spreading the malware. Combining computational modellingand social network analysis we identify the most effective strategy for dis-rupting networks of malicious URLs. Our results emphasise the importanceof specific network disruption parameters such as network and emotion fea-tures, which have proven to be more effective in disrupting malicious networkscompared to random strategies. In conclusion, disruption strategies force cy-bercriminal networks to become more vulnerable by strategically removing malicious users, which causes successful network disruption to become a long-term effort