bluuebunny/crossref_metadata_2025 huggingface dataset:
Measurement-evaluation applications of context-based activities in hybrid learning environments
Authors: KUMAŞ Ahmet
Published: November 2022

Students may be at a disadvantage when learning if they cannot follow lessons face to face due to such reasons as epidemics, disasters, transportation, or family. The main purpose of this study is to perform alternative measurement and evaluation practices in hybrid learning environments in a way that will make students in online physics lessons active participants in the process. The research uses the developmental, emancipatory, and critical action research models within the scope of the qualitative research method. The research was carried out over three weeks under the guidance of the researcher with 32 10th-graders at the school where the researcher taught physics for 12 years. Semi-structured interview forms, rubric forms, and documents were used as data collection tools. The interviews and documents were evaluated using content analysis, while the rubrics were evaluated using descriptive analysis. The students’ active and decisive roles during the assessment and evaluation activities within the context-based learning activities regarding physics subjects as well as at the end of learning encouraged the students attending the lesson online and those attending in person to learn under the same conditions. In this context, activities in which students are a part of the learning and measurement-evaluation processes should be encouraged in online and hybrid-learning environments. Developing context-based activities with regard to experiments, analogy, and theoretical applications and developing qualified practices in which students will be active throughout the process under the guidance of action researchers will be beneficial for ensuring this.
The role of teacher support and in class teaching practices on reading performance: Evidence from PISA 2018 outcomes for Türkiye
Authors: BOZKURT B. Ümit
Published: November 2022

The study deals with the variation of Turkish students' reading comprehension performance according to perceived teacher support and reading activities in the classroom. This study, which is grounded on the data drawn from the PISA 2018 database, investigates the relationship between certain variables. In the analyses performed on the PISA IDE server, the PISA 2018 reading literacy general averages of Türkiye were associated with the identified variables, and the differences in the averages were examined. As a result, perceived teacher support, teacher's adaptation of the course, and stimulation of reading engagement have a positive relationship with reading comprehension; however, it was found out that the frequency of receiving feedback had a negative relationship with reading performance. In addition, the general reading average of the students who reported that they had not performed activities such as summarizing, comparing the content of the text with their own experiences, comparing the text they have read with other texts written on similar topics, and writing about the text that has been read was much higher than those who reported that they had performed these activities. These results have strengthened the conclusion that teachers give feedback to poor readers more frequently. On the other hand, it is possible that good readers may find the learning activities in the course inadequate. In summary, reading comprehension performance is positively or negatively affected by teacher support, adaptive instruction, feedback, and engagement in reading activities in the classroom.
Grain bran hydrolysates in the production of fruit distillates
Authors: Krikunova Ludmila , Meleshkina Elena , Vitol Irina , Dubinina Elena , Obodeeva Olga
Published: November 2022

Currently, there is an urgent need for domestic fermentation activators based on low-cost secondary raw materials. We aimed to study the effect of microbial enzyme preparations with different action on the hydrolysis of proteins and phytin of grain bran to obtain fermentation activators that could become an alternative to imported ones.

We studied wheat and rye brans; microbial enzyme preparations with cytolytic, proteolytic, and phytase action; multi-enzyme compositions; and grain bran hydrolysates. Firstly, we determined the kinetic characteristics of enzyme preparations. Secondly, we evaluated their effectiveness in the hydrolysis of the brans. Thirdly, we developed multi-enzyme compositions. Finally, we determined the concentration of soluble forms of phosphorus and free amino acids in the hydrolysates.

We determined optimal temperature and pH values for the enzyme preparations. The multi-enzyme compositions contributed to a high accumulation of reducing substances, water-soluble protein, and phosphorus. The concentration of free amino acids in the hydrolysates obtained under the action of the bran’s own enzymes was about 20% higher in the wheat samples, compared to the rye samples. However, when using multi-enzyme compositions in addition to the bran’s own enzymes, the concentration of free amino acids was 1.5 times higher in the rye hydrolysates, compared to the wheat hydrolysates.

The use of multi-enzyme compositions under optimal conditions can double the content of phosphorus and free amino acids available for yeast, compared to the control. Our results can be used for further research into using grain bran hydrolysates as an alternative source of nitrogen and phosphorus nutrition for yeast at the fermentation stage of fruit distillate production.
Wastewater reclamation trends in Thailand
Authors: Kanchanapiya Premrudee , Tantisattayakul Thanapol
Published: November 2022

Thailand constantly faces the problem of water scarcity, resulting from an imbalance between available water supply and increasing water demand for economic and community expansion, as well as climate change. To address this shortage, wastewater reclamation is being planned and implemented throughout the country, along with a 20-year, long-term integrated water resource management plan. Significant opportunities from municipal wastewater treatment plants (WWTPs) are dependent on the following factors: the establishment of a reuse water framework and a tangible target for treated wastewater set by local government authorities; widespread recognition and adaptation of wastewater reuse measures in the agriculture, industry, tourism and service sectors regarding climate change and water stress; and the implementation of joint investment water reuse projects between private and government agencies. However, wastewater reclamation faces some significant challenges, specifically: the limitations of regulation and monitoring for specific reuse purposes; a lack of public confidence in the water quality; the limited commercial development of reclaimed wastewater research; and difficulties in self-sustaining business models through adapting circular economy principles. This study aims to provide an overview of the wastewater reclamation, present research trends, currently operating WWTPs as well as opportunities and challenges to speed up water reuse activities in Thailand.
Nos une el dolor. Vulnerabilidad y resiliencia de personas migrantes centroamericanas trans y gays en tránsito por México
Authors: Valenzuela Barreras José Francisco , Anguiano-Téllez María-Eugenia
Published: November 2022

En este trabajo se analizan las experiencias de vulnerabilidad y el desarrollo de resiliencia en mujeres trans y hombres gays de Centroamérica que transitaron por México hacia Estados Unidos entre 2017 y 2020. Con base en entrevistas realizadas en un albergue para migrantes LGBT+ en Tijuana, se muestra que la vulnerabilidad se expresa en actos de violencia y discriminación por parte de autoridades, organizaciones criminales, y otros migrantes, en respuesta a la orientación sexual e identidad de género de las mujeres trans y los hombres gays. En contraparte, la resiliencia se desarrolló gracias al respaldo proporcionado por redes de la propia comunidad LGBT+ en forma de familias elegidas y espacios de la sociedad civil. A partir de eso se observa que, aún dentro de la vulnerabilidad, la movilidad posibilita el desarrollo de resiliencia a través de nuevas formas de vivir el género y la sexualidad.
Association Between Cannabis Smoking and Academic Achievement in High-School Students
Authors: Pérez-Martínez Yegson , Ceballos-Ospino Guillermo Augusto , Campo-Arias Adalberto
Published: November 2022

Background:

Cannabis smoking can affect academic achievement, and depressive symptoms and family dysfunction are also associated with it. The study’s objective was to establish the relationship between cannabis smoking and academic achievement, linked to clinically important depressive symptoms and family dysfunction.

Methods:

A cross-sectional study was designed. The authors quantified lifetime cannabis smoking, perception of academic achievement, clinically important depressive symptoms, and family dysfunction. The crude association between cannabis smoking and academic achievement was computed; after it was adjusted by clinically important depressive symptoms and family dysfunction.

Results:

1,462 students between 13 and 17 participated in the research; 11.6% reported lifetime cannabis smoking, 30.8% poor-fair academic achievement; 7.1% clinically important depressive symptoms; and 76.1% family dysfunction. Lifetime cannabis smoking was significantly associated with poor-fair academic achievement after adjusting for clinically important depressive symptoms and family dysfunction (OR = 1.61, 95%CI 1.16 - 2.24).

Conclusion:

Lifetime cannabis smoking is related to poor-fair academic achievement among high-school students in Santa Marta, Colombia.
Trauma-Focused Cognitive Behavioral Therapy (TF-CBT), Cognitive Behavioral Intervention on Trauma in Schools (CBITS), and Other Promising Practices in the Treatment of Post-Traumatic Stress Disorder in Children and Adolescents: Evidence Evaluation
Authors: Syros Ioannis , Karantzali Aggeliki , Anastassiou-Hadjicharalambous Xenia
Published: November 2022

PTSD is a serious mental health condition with a lifetime prevalence of 1% to 14% in the general population. Several studies have evaluated evidence-based treatment approaches for children and adolescents. Interventions focusing on trauma are considered first-line treatments. Trauma-Focused Cognitive Behavioral Therapy (TF-CBT) and a similar type of group intervention, the Cognitive Behavioral Intervention on Trauma in Schools (CBITS), have received the most empirical support from randomized controlled trials. Moreover, several other promising therapeutic CBT protocols are in the process of being applied and evaluated. This literature review highlights the common elements of CBT approaches for treating PTSD in children and adolescents, provides a detailed review of the therapeutic ingredients of TF-CBT and CBITS, and presents various other promising CBT protocols that are currently being used or evaluated. Future directions for the field are also discussed.
A Machine Learning-Based Approach to Predict Prognosis and Length of Hospital Stay in Adults and Children With Traumatic Brain Injury: Retrospective Cohort Study
Authors: Fang Cheng , Pan Yifeng , Zhao Luotong , Niu Zhaoyi , Guo Qingguo , Zhao Bing
Published: November 2022

Background

The treatment and care of adults and children with traumatic brain injury (TBI) constitute an intractable global health problem. Predicting the prognosis and length of hospital stay of patients with TBI may improve therapeutic effects and significantly reduce societal health care burden. Applying novel machine learning methods to the field of TBI may be valuable for determining the prognosis and cost-effectiveness of clinical treatment.

Objective

We aimed to combine multiple machine learning approaches to build hybrid models for predicting the prognosis and length of hospital stay for adults and children with TBI.

Methods

We collected relevant clinical information from patients treated at the Neurosurgery Center of the Second Affiliated Hospital of Anhui Medical University between May 2017 and May 2022, of which 80% was used for training the model and 20% for testing via screening and data splitting. We trained and tested the machine learning models using 5 cross-validations to avoid overfitting. In the machine learning models, 11 types of independent variables were used as input variables and Glasgow Outcome Scale score, used to evaluate patients’ prognosis, and patient length of stay were used as output variables. Once the models were trained, we obtained and compared the errors of each machine learning model from 5 rounds of cross-validation to select the best predictive model. The model was then externally tested using clinical data of patients treated at the First Affiliated Hospital of Anhui Medical University from June 2021 to February 2022.

Results

The final convolutional neural network–support vector machine (CNN-SVM) model predicted Glasgow Outcome Scale score with an accuracy of 93% and 93.69% in the test and external validation sets, respectively, and an area under the curve of 94.68% and 94.32% in the test and external validation sets, respectively. The mean absolute percentage error of the final built convolutional neural network–support vector regression (CNN-SVR) model predicting inpatient time in the test set and external validation set was 10.72% and 10.44%, respectively. The coefficient of determination (R2) was 0.93 and 0.92 in the test set and external validation set, respectively. Compared with back-propagation neural network, CNN, and SVM models built separately, our hybrid model was identified to be optimal and had high confidence.

Conclusions

This study demonstrates the clinical utility of 2 hybrid models built by combining multiple machine learning approaches to accurately predict the prognosis and length of stay in hospital for adults and children with TBI. Application of these models may reduce the burden on physicians when assessing TBI and assist clinicians in the medical decision-making process.
Accuracy and Systematic Biases of Heart Rate Measurements by Consumer-Grade Fitness Trackers in Postoperative Patients: Prospective Clinical Trial
Authors: Helmer Philipp , Hottenrott Sebastian , Rodemers Philipp , Leppich Robert , Helwich Maja , Pryss Rüdiger , Kranke Peter , Meybohm Patrick , Winkler Bernd E , Sammeth Michael
Published: November 2022

Background

Over the recent years, technological advances of wrist-worn fitness trackers heralded a new era in the continuous monitoring of vital signs. So far, these devices have primarily been used for sports.

Objective

However, for using these technologies in health care, further validations of the measurement accuracy in hospitalized patients are essential but lacking to date.

Methods

We conducted a prospective validation study with 201 patients after moderate to major surgery in a controlled setting to benchmark the accuracy of heart rate measurements in 4 consumer-grade fitness trackers (Apple Watch 7, Garmin Fenix 6 Pro, Withings ScanWatch, and Fitbit Sense) against the clinical gold standard (electrocardiography).

Results

All devices exhibited high correlation (r≥0.95; P<.001) and concordance (rc≥0.94) coefficients, with a relative error as low as mean absolute percentage error <5% based on 1630 valid measurements. We identified confounders significantly biasing the measurement accuracy, although not at clinically relevant levels (mean absolute error<5 beats per minute).

Conclusions

Consumer-grade fitness trackers appear promising in hospitalized patients for monitoring heart rate.

Trial Registration

ClinicalTrials.gov NCT05418881; https://www.clinicaltrials.gov/ct2/show/NCT05418881
Using Clinician-Patient WeChat Group Communication Data to Identify Symptom Burdens in Patients With Uterine Fibroids Under Focused Ultrasound Ablation Surgery Treatment: Qualitative Study (Preprint)
Authors: Zhang Jiayuan , Xu Wei , Lei Cheng , Pu Yang , Zhang Yubo , Zhang Jingyu , Yu Hongfan , Su Xueyao , Huang Yanyan , Gong Ruoyan , Zhang Lijun , Shi Qiuling
Published: November 2022

BACKGROUND

Unlike research project–based health data collection (questionnaires and interviews), social media platforms allow patients to freely discuss their health status and obtain peer support. Previous literature has pointed out that both public and private social platforms can serve as data sources for analysis.

OBJECTIVE

This study aimed to use natural language processing (NLP) techniques to identify concerns regarding the postoperative quality of life and symptom burdens in patients with uterine fibroids after focused ultrasound ablation surgery.

METHODS

Screenshots taken from clinician-patient WeChat groups were converted into free texts using image text recognition technology and used as the research object of this study. From 408 patients diagnosed with uterine fibroids in Chongqing Haifu Hospital between 2010 and 2020, we searched for symptom burdens in over 900,000 words of WeChat group chats. We first built a corpus of symptoms by manually coding 30% of the WeChat texts and then used regular expressions in Python to crawl symptom information from the remaining texts based on this corpus. We compared the results with a manual review (gold standard) of the same records. Finally, we analyzed the relationship between the population baseline data and conceptual symptoms; quantitative and qualitative results were examined.

RESULTS

A total of 408 patients with uterine fibroids were included in the study; 190,000 words of free text were obtained after data cleaning. The mean age of the patients was 39.94 (SD 6.81) years, and their mean BMI was 22.18 (SD 2.78) kg/m2. The median reporting times of the 7 major symptoms were 21, 26, 57, 2, 18, 30, and 49 days. Logistic regression models identified preoperative menstrual duration (odds ratio [OR] 1.14, 95% CI 5.86-6.37; P=.009), age of menophania (OR –1.02 , 95% CI 11.96-13.47; P=.03), and the number (OR 2.34, 95% CI 1.45-1.83; P=.04) and size of fibroids (OR 0.12, 95% CI 2.43-3.51; P=.04) as significant risk factors for postoperative symptoms.

CONCLUSIONS

Unstructured free texts from social media platforms extracted by NLP technology can be used for analysis. By extracting the conceptual information about patients’ health-related quality of life, we can adopt personalized treatment for patients at different stages of recovery to improve their quality of life. Python-based text mining of free-text data can accurately extract symptom burden and save considerable time compared to manual review, maximizing the utility of the extant information in population-based electronic health records for comparative effectiveness research.
Evaluating Web-Based Care for Mental Health and Substance Use Issues for Lesbian, Gay, Bisexual, Transgender, Queer, Questioning, and 2-Spirit Youths in the Context of the COVID-19 Pandemic: Community-Based Participatory Research Study (Preprint)
Authors: Chaiton Michael , Thorburn Rachel , Chan Emily , Copeland Ilana , Luphuyong Chieng , Feng Patrick
Published: November 2022

BACKGROUND

Mental health (MH) and substance use (SU) care supports are often difficult to access for the lesbian, gay, bisexual, transgender, queer, questioning, and 2-spirit (LGBTQ2S+) population. There is little known on how the shift to web-based care has affected and changed the experiences of LGBTQ2S+ youths within the MH care system.

OBJECTIVE

This study sought to examine how web-based care modalities have affected access to care and quality of care for LGBTQ2S+ youths seeking MH and SU services.

METHODS

Researchers used a web-based co-design method to explore this population’s relationship with MH and SU care supports, focusing on the experiences of 33 LGBTQ2S+ youths and their relationship with MH and SU supports during the COVID-19 pandemic. A participatory design research method was used to gain experiential knowledge of LGBTQ2S+ youths’ lived experience with accessing MH and SU care. Thematic analysis was used to examine the resulting audio-recorded data transcripts and create themes.

RESULTS

Themes related to web-based care included accessibility, web-based communication, provision of choice, and provider relationship and interactions. Barriers to care were identified in particular for disabled youths, rural youths, and other participants with marginalized intersecting identities. Unexpected benefits of web-based care were also found and emphasize the idea that this modality is beneficial for some LGBTQ2S+ youths.

CONCLUSIONS

During the COVID-19 pandemic, a time where MH- and SU-related problems have increased, programs need to reevaluate current measures so that the negative effects of web-based care modalities can be reduced for this population. Implications for practice encourage service providers to be more empathetic and transparent when providing services for LGBTQ2S+ youths. It is suggested that LGBTQ2S+ care should be provided by LGBTQ2S+ folks or organizations or service providers who are trained by LGBTQ2S+ community members. Additionally, hybrid models of care should be established in the future so that LGBTQ2S+ youths have the option to access in-person services, web-based ones, or both as there can be benefits to web-based care once it has been properly developed. Implications for policy also include moving away from a traditional health care team model and developing free and lower-cost services in remote areas.
Crises : expérience, langage et littérature
Authors: Bertrand Jean-Pierre , Provenzano François
Published: November 2022

Cet article envisage d’abord la manière dont les récits d’Éric Chauvier mettent en scène les échecs de la communication ordinaire et thématisent une crise de l’expérience par le constat d’une faillite du langage. Il interroge ensuite l’agentivité proprement littéraire de ce constat, face à ses équivalents plus strictement théoriques. La question posée est celle de la justification et des modalités de l’énonciation littéraire dans un contexte de déficit pragmatique généralisé des formes verbales. Cette question est traitée en activant des échos à l’oeuvre de Walter Benjamin : non seulement la mythologie baudelairienne et le rire barbare qu’elle sert, mais aussi les réflexions sur l’activité narrative et sur la crise de l’expérience. 

Keywords : Éric Chauvier, Walter Benjamin, pragmatique, expérience, narration
Une littérature d’enquête. Entretien avec Éric Chauvier
Authors: Frei Peter , Hunkeler Thomas
Published: November 2022

Peter Frei et Thomas Hunkeler se sont entretenus avec Éric Chauvier d’abord lors d’une discussion publique à l’Université de Fribourg le 13 décembre 2021, puis une deuxième fois, en comité plus restreint, le lendemain. La version écrite de ces échanges, préparée avec le concours de Claire Niederer, a été relue par Éric Chauvier. 

Keywords : Sciences sociales, littérature, édition, Éric Chauvier
"Il Negromante" di Ludovico Ariosto, tra modelli classici e suggestioni magico-astrologiche
Authors: Albergati Noè
Published: November 2022

Nonostante vi siano legami con la commedia classica, Ariosto nel Negromante inserisce numerosi elementi originali, a cominciare dal personaggio di Iachelino e dagli aspetti magico-astrologici a lui connessi. Il saggio mira a rilevare questi aspetti e a porli in relazione sia alla cultura occulta dell’epoca sia al dibattito che interessò la sua liceità ed efficacia. Lo scarto tra le due redazioni della commedia, infatti, lascia intuire come l’acuirsi del tasso di sarcasmo mirasse a colpire coloro che dimostravano eccessiva credulità e conferivano troppa fiducia a chi esercitava tali arti, nobili compresi. La scelta di Ariosto assume inoltre ulteriore peso, nella sua volontà di denuncia, considerando l’ambiente della corte estense sempre pronto ad accogliere personaggi come Iachelino. 

Keywords: Ariosto, commedia, negromante, astrologia, magia
Apuleio, l’adulterio e la "Milesia" di Donato Giannotti
Authors: Cosentino Paola
Published: November 2022

Partendo dalla commedia fiorentina di inizio Cinquecento, il saggio prende in esame la Milesia di Giannotti collocandola a fianco degli analoghi esperimenti teatrali in versi realizzati da Jacopo Nardi e da Lorenzo Strozzi. Insieme ai testi comici antichi, l’opera sembra guardare alle novelle contenute nel IX libro delle Metamorfosi di Apuleio legate al tema dell’adulterio, tenendo altresì conto delle riscritture fornite da Boccaccio nel Decameron (V, 10 e VII, 2) e dal Mantovano nel Formicone. 

Keywords: Firenze, commedia cinquecentesca, Giannotti, Apuleio, adulterio
Vecchi ridicoli: sul comico dei veneziani "imbertonai" della commedia plurilingue cinquecentesca
Authors: Merisi Giovanni
Published: November 2022

Il contributo vuole indagare alcuni aspetti all’origine del comico di una delle maschere più fortunate di sempre: Pantalone. Individuando l’archetipo del personaggio nei vecchi della commedia plurilingue cinquecentesca, il lavoro sonda alcuni aspetti della lingua di Andronico e Sier Tomao delle commedie ruzantiane Bilora e Anconitana, dei calmiani Zurlotto, Collofonio, Cornelio e Melindo, Spagnolas, Saltuzza, Rodiana, Travaglia, e di Sabanello della Pace di Marin Negro, cercando di capire in che modo la varietà lagunare contribuisca alla resa scenica di questo carattere. Si farà particolare attenzione alla natura contrastiva da cui deriva il comico pantaloniano, analizzando tensioni di tipo linguistico, caratteriale e situazionale. 

Keywords: Pantalone, teatro, commedia plurilingue, veneziano, vecchio
Uso y función de unas «decimillas» hexasilábicas en el teatro de Jacinto Cordeiro
Authors: Muñoz Rodríguez Elena
Published: November 2022

Desde que la estrofa de diez versos comenzó a cultivarse en los cancioneros medievales del siglo XV, las combinaciones de rimas, la distribución de las pausas y el número de sílabas por verso han ido variando creando formas diferentes. En el presente trabajo se aborda el estudio de una de estas formas hasta ahora inadvertida en el teatro del Siglo de Oro: la décima hexasilábica con esquema de rimas abbaaccddc –el propio de la décima espinela, la variante más utilizada en el Siglo de Oro y aún hoy–. Probablemente, el primer autor en incorporarla a su teatro fue Andrés de Claramonte, pero el portugués Jacinto Cordeiro la cultivó con más frecuencia, influyendo posiblemente en Manuel de Almeida Pinto, de quien conservamos una sola comedia. 

Keywords: Décima espinela, métrica, Jacinto Cordeiro, teatro hispano-portugués, teatro del Siglo de Oro.
Miguel de Barrios, la “Academia dos Generosos” y sus “Aplauzos académicos” a la victoria del Ameixial
Authors: Pancorbo Fernando J.
Published: November 2022

Este trabajo se centra en el estudio de los Aplauzos académicos e rellação do felice successo da celebre victoria do Ameixial (Ámsterdam, Jacob van Velsen, 1673). Se trata de una obra coral en la que el sefardí Miguel de Barrios quiso aportar sus versos a aquellos que surgieron en el seno de la célebre Academia dos Generosos de Lisboa para conmemorar la victoria lusa frente a las tropas españolas el 8 de junio de 1663. Lejos de querer ofrecer un análisis meramente literario, el interés de este artículo se enfoca en la revisión de la red de relaciones del autor, su aparente relación con estos ingenios lisboetas y los nobles destinatarios de esta obra, y su propia intención política y editorial. 

Keywords: Miguel de Barrios, Academia dos Generosos, don Sancho Manuel, batalla de Ameixial, literatura sefardí.
PEMANFAATAN LIMBAH INDUSTRI BATU APUNG UNTUK PEMBUATAN BATU HIAS BANGUNAN
Authors: Hargianto Arifin , Satyarno Iman , - Mudjijana
Published: November 2022

Mining and processing activities have caused pumice deposits of waste. Waste from industrial processing of pumice is used as an innovation to increase the value of the waste and then profits will be obtained. One of the examples is making them as decorative stones.Raw materials used in this study are industrial waste pumice from Lombok, with the size less than 2 cm. The machine used as a fine aggregate pumice waste destruction is a crusher. Variations of the composition of the mixed mortar are made from white cement, powdered pumice waste as fine aggregate, and water. Variation is the comparison between the composition of the mixture of white portland cement (pc) and fine aggregate from pumice waste (Ag.h) with comparisons 1Pc: 2Ag.h, 1Pc: 4Ag.h, 1Pc: 6Ag.h, 1Pc: 8Ag.h and 1Pc: 10Ag.h. Tests are conducted to determine the characteristics of fine aggregate made from pumice waste, while the mortar test includes compressive strength, flexural strength, specific gravity and water absorption.The results show that the fine aggregate made from pumice industrial waste materials has the following characteristics : modulus of fine grains is 2.61, specific gravity is 1.67, absorption of water is 23.08%, mud content is 26.10%, and weight lose unit is 0.537 gr/cm3. On the mortar test, mixed variations affect the compressive strength, flexural strength, specific gravity and water absorption. The test results find that the variation of a mixture of 1 pc: 2 Ag.h has characteristics of natural stone that is the closest to the gravity of 262 gr/cm and with 3,11 813 MPa in compressive strength, 0344 MPa in flexural strength, and 19.93% in water absorption value. Variation of a mixture of 1 pc: 2 Ag.h has also been tested in the manufacture of decorative stones and the results can have the similar look with the natural stone.
CALIBRATION OF 1-D NUMERICAL CODES SOFTWARE FOR SITE RESPONSE ANALYSES
Authors: Hadsari Vienti , Susanto Adhi , Wilopo Wahyu , Lanzo Giuseppe , Pagliaroli Alessandro , Chamlagain Deepak , Adhikari Ramesh
Published: November 2022

Ground response analyses are used to predict surface ground motions for development of design response spectra, to evaluate dynamic stresses and strains for evaluation of earthquake hazards, and to determine the earthquake induced forces that can lead to instability of earth-retaining structures. The effects of local soil on ground motion are commonly evaluated by performing numerical analyses either in frequency or time domains.In order to evaluate the differences between frequency and time domain analysis, several analyses were conducted for homogenous stiff soil deposit with respective codes which are SHAKE and D-MOD2000. Linear and non linear analyses have been conducted. The non linear analyses with D-MOD2000 code have been carried out by using different frequencies in the Rayleigh damping formulation, i.e. fundamental and predominant frequency. For linear, PGA 0.1g is used in the analysis while for non linear PGA is scaled into three different value of 0.1, 0.3, and 0.5g.The results for both linear and non linear approach are similar. For the non linear analyses, it is shown that the curves derived using predominant frequency perform better than those using fundamental frequency. Main differences are for non linear approach where the differences between two codes are higher for higher input motion. As the calibration using predominant frequency between the two codes perform good, the respective codes are applied to evaluate soil response in Sant’ Agostino and San Carlo, in terms of PGA, due to May 20th 2012 Emilia Earthquake. There are 139 accelerometric station recorded strong motion. In this analysis, we consider one record which is in Mirandola station, the closest recording station where the Magnitude in epicentral area was 5.9 and 5.8 in Mirandola station. The recorded surface motion in Mirandola is transferred to the bedrock in 112 m depth and used as input motion for the two evaluated sites, San Carlo village and nearby municipality Sant’Agostino on 17 km distance from Mirandola station. The preliminary data presented here shows the PGA recorded in the bedrock of Mirandola station is 0.75g, while in Sant’Agostino and San Carlo is 0.92g and 0.81g.
PEMANFAATAN LIMBAH CAIR INDUSTRI AREN DI DUKUH BENDO, DESA DALEMAN, KEC. TULUNG, KAB. KLATEN SEBAGAI PUPUK ORGANIK CAIR (POC) DENGAN METODE PENGOLAHAN AEROBIK
Authors: Pongoh Jovita Irene , - Sarto , Sulaiman Muhammad
Published: November 2022

These days, a lot of solid and liquid waste produced from aren powder indutry, and one of the area for this industry located in Bendo Subvillage, Klaten District, Central Java. The liquid waste is the unwanted product from of the aren powder during the screening and precipitation process.. The liquid waste produced by the industry at Dukuh Bendo is containing  high of BOD and COD and this is became an environmental disaster as most of the liquid waste did not through the waste treatment process, and sent directly to water stream so there is a need to overcome or minimize this whole problem, and the making of liquid organic fertilizer from the liquid waste of this industry is one of the solution. The usage of liquid organic fertilizer also can reduce the usage of chemical fertilizer and also can help repair the soil condition and minimize the environmental destruction caused by liquid waste from this industry.During the research, for the liquid waste treatment aerobic proces in the aeration pond is used with the addition of bacteria and varoius dilution composition; VAR1 the composition between liquid waste and water 50:50 with bacteria added, VAR2 the composition between liquid waste and water 80:20 with bacteria added, VAR3 the composition 100% liquid waste with bacteria added, VAR4 100% liquid waste with no bacteria added. From the laboratory test found that the liquid waste from aren industry contains 686 mg/l BOD and 5800 mg/l COD. The research was done in some stages; preliminary test to understand the characteristic of the liquid waste from aren powder industry, specially the BOD and COD levels,treatment in the aeration pond, and the result from the process ( liquid organic fertilizer) and it tested to cornstalk in this research and the height and the leaves growth are recordedThe result from aeration process with bacteria added are : the BOD with the efeective retention time for VAR2 is in day 4, with BOD level at 3.2 mg/l which is 98.8% reduced from the original level ( 686 mg/l). The COD with effective retention time for VAR2 is in day 4 with COD  level at 120 mg/l which is 96.98% reduced from the original level ( 5800 mg/l. The maximum nitrogen level is in day 5 at 0.07629%, phospor level at 0.0199% and potassium level at 0.0169%the positif growth of the cornstalk recorded during the period of the time showing that the nutrient absorbed properly.
ANALYSIS OF PHOSPHATE IN LIQUID WASTE HOSPITAL
Authors: Nurhayati Emmy , Hidayat Muslikhin , Saraswati Sri Puji
Published: November 2022

Liquid waste generated by various activities in the hospital environment has the potential to pollute the environment if the parameters contained in it exceeds the specified quality standards. Parameters that most often exceeded the quality standard is phosphate (PO43-). Phosphate which exceeds the limit of 2 mg/L may affect the balance of aquatic ecosystems. One way to lower phosphate levels is using the coagulation flocculation process. This study aims to uncover the root cause of high levels of phosphate and recommendations for decline it and propose to install coagulation flocculation units.Research methodology starts from search and identification of phosphate levels of various source of phosphate in the hospital environment, from sump pit Dapur (Kitchen), sump pit Poli (Polyclinic), sump pit Lucas, sump pit Biara (Monastery), sump pit Genset and sump pit Carolus. Then doing the jar test in coagulation flocculation process using coagulant that is alum and lime with rapid stirring for 60 seconds and slow stirring for 15 minutes. Jar test was used to determine the optimal dose of coagulant for alum dose range between 50-150 (mg/L) and lime between 75-125 (mg/L). Coagulation flocculation units will be built on the largest phosphate producer with sampling as much as 6 times to determine the fluctuations of phosphate. Lab test of phosphate levels were performed using the spectrophotometric of SnCl2 method.The study data include phosphate levels from source of phosphate and phosphate fluctuations in the greatest source. Based on the results the largest source from pond Elisabeth. Jar test process is done by sampling as much as a liter of waste water taken from pond Elisabeth with total discharge of 26,640 L/day. Showed that the initial Phosphate of maximum from 7,1 mg/L decreased to 1,73 mg/L (75,63%) if given the alum dose of 50 mg/L and lime 125 mg/L which generates as much as 7,049 kg of sludge per day. Phosphate of average from 4,58 mg/L decreased to 0,73 mg/L (84,06%) with alum as much as 50 mg/L and lime as much as 75 mg/L which produces sludge as much as 5,378 kg/day. Phosphate of minimum from 2,23 mg/L decreased to 0,14 mg/L (93,72%) if given the alum dose of 50 mg/L and lime 75 mg/L with sludge as much as 4,931 kg/day.
GREYWATER MANAGEMENT OF PANTAI BARU PANDANSIMO KABUPATEN BANTUL FOR CREATING ZERO WASTE ZONE
Authors: Saputra Agung Eka , Kusumawanto Arif , Syamsiah Siti
Published: November 2022

The beach which is experiencing the current developments in the districts of Bantul is Pantai Baru Pandansimo. This area is an area that has been declared by the Bantul regent as zero waste zone. The development of Pantai Baru Pandansimo will give some impact. Thing that can arises is the environmental pollution from trading activity at restaurants around Pantai Baru Pandansimo. Every restaurant produce washing waste (greywater) had only absorbed into the ground or yard restaurants because do not have access to treatment plant.          The main objective of this research is plan alternative system management for greywater that corresponding to Pantai Baru Pandansimo area so can creating sustainable zero waste zone. The results of the analysis obtained that alternative management unit greywater that appropriate and can be used at Pantai Baru Pandansimo is subsurface constructed wetland  because easy to understand society and easy maintenance. Application of processing units that had been planned to reduce the BOD load in the amount of 41% depending on the extent of the unit to be used and reduce greywater is discharged into the environment 60% -80% of waste. From calculations obtained, wetland unit dimensions used by the average discharge within one week of 276.25 liters / day is 1 x 0.5 x 0.8 m3 with detention time (td) 0,5 day. Wetland that is used can be used as a park around the culinary of Pantai Baru Pandansimo and can encourage people to be more aware of the concept of zero waste.
THE DETERMINATION OF LANDFILL (TPA) ALTERNATIVE LOCATION IN WEST TULANG BAWANG DISTRICT OF LAMPUNG PROVINCE
Authors: Renisita Desy , Sunjoto Sunjoto , Sarto Sarto
Published: November 2022

West Tulang Bawang is one of the new regencies in Indonesia which was a new expanded area that continues to grow. It is followed by population growth rates resulting in increased volume of waste. The landfill (TPA) is an important component of any waste management system. A good waste has several characteristics. To ensure the appropriate selected land, a systematic process must be developed and followed.The study of the selection of the landfill (TPA) is aimed at finding feasible area as the location of the landfill, so that the allocation of the new landfill will be in accordance with local policies in regional spatial planning and meet the criteria of ISO No. 19-3241-1994. The role of Geographic Information System (GIS) in the management of solid waste is important because many aspects of planning and operations are highly dependent on the spatial data. The landfill selection process consists of three stages of filtering, i.e., the feasibility of the environment by utilizing Geographic Information System (GIS) to map the location of viable landfill, regional filtering phase based on the regional policy and the elimination filtering using SNI 19-3241-1994.The results of the study showed that with an estimated population in 2033 which is 330 807 people, the amount of waste that will go to the landfill through the 3R principle reached 309.36 m3 / day or 61.87 tons / day so that the area of the required land for the sanitary landfill pattern with a 20 year planning is 17.70 Ha. The alternative location was selected by with a priority level which is located on the Panaragan Jaya Utama of Central Tulang Bawang sub-district with a land of 99.68 hectares, Tulang Bawang village districts Panaragan Central with a land area of 136.26 ha and the Kagungan Ratu village of Tulang Bawang sub-district of 74 , 65 Ha.
WIND ENERGY POTENTIAL OF GUNUNG KIDUL COASTAL AS A FUNCTION OF PROBABILITY DISTRIBUTION
Authors: PH Hendro , Setiawan Ahmad Agus , Widyaparaga Adhika
Published: November 2022

Gunung Kidul coastal is an area that has varying heights up to 250 meters above sea level, and dealing directly with the Indian Ocean. Based on the location of the height of the sea surface, with Logarithmic formulation of wind speed, Gunung Kidul coastal has a varying energy class. The method used is an analytical model of constant density atmospheric, assuming that the density of the air from sea level to the top of the atmosphere has a fixed value. Furthermore, the value of wind speed is used as a probability distribution function based on the data period of 24.5 years. The results of the average value of wind energy are grouped according to energy class. On the use of the Poisson probability distribution, the class of potential good of energy is reached at a height of over 450 meters above sea level. While the use of the Normal distribution and Weibull reach potential class good at 100 meters above sea level.
AN IMPROVEMENT IN THE MOBILITY OF MANGKUBUMI YOGYAKARTA AREA WITH URBAN MODELING INTERFACE SIMULATION
Authors: Hartanta FA Galih Sih , Kusumawanto Arif
Published: November 2022

Mangkubumi Yogyakarta area is not only a strategic area in the city of Yogyakarta, which lies on the axis of philosophy, forming the spatial structure of the city of Yogyakarta but also a compact area with building facilities that function as offices, education, trade/services, worship, and settlements. The discourse of developing the site has long been announced as a supporting area for Malioboro tourism, and Tugu station developed into TOD (Transit Oriented Development), among others. In 2019, the research, development research aiming to find an area model supporting the realization of the maximum mobility value was carried out in Mangkubumi area to measure mobility levels in the area, and the results of this study found that the rate of mobility and walkability was 76 and 79 respectively.The method used was a simulation of the Urban Modeling Interface (UMI) software to measure the value of mobility in regional models. The research step used area modeling, which was carried out in eight models. After the simulation, the best model with the highest mobility value was selected. The eight models were made based on the four road network patterns of Morlok’s idea (Grid, Spiral, Hexagonal, and Delta), each of which was designed to be two types, namely, type A and type B. Type A was a form of modeling by conducting interventions focused on residential building facilities, and type B was focused on all area building facilities. The finding of this research was that the best road network pattern was the Delta network pattern after intervening in all building facilities and after carrying out land use by placing residential building facilities at the center of the area and placing other building facilities on edge the area. This simulation resulted in a walkability score of 92 and bike-ability of 92. The score is the highest in the walk score ranking level. A value of 92 means that there are walker's paradise, daily business not requiring a car, and biker's paradise, daily affairs done by cycling.
FEASIBILITY STUDY OF MICRO HYDRO POWER PLANT CAPACITY IN BLUMBANG BANJARARUM KALIBAWANG KULONPROGO
Authors: Timur Lintang , Hindarti Fifin , Indrawati Rosiana
Published: November 2022

The Blumbang micro hydro power plant is a power plant utilizing hydropower that supplies electricity to the Blumbang area. The resulting supply is very large, around 30 kWh. However, it cannot be fully used by the surrounding society. So, it is necessary to do a feasibility study to increase the power capacity to determine supply and demand. This research aims to determine the community's supply and demand, which will impact the potential that can be taken by society.The method used is field observations, supply and demand observations, analysis of differences in supply and demand. The results that the feasibility of increasing the power capacity. It supplies generated from PLTMH Blumbang ranges from 24-26 kWh of the electricity demand of micro hydro power plant, 6 kWh demand electricity of micro hydro power plant and PLN 16 kWh. The Blumbang society's electricity bill has decreased with the Blumbang micro hydro power plant.
MODEL OF VEHICLE ROUTING PROBLEM WITH SPLIT DELIVERY, MULTI TRIPS, MULTI PRODUCTS AND COMPARTMENTS FOR DETERMINING FUEL DISTRIBUTION ROUTES
Authors: Ramadhani Dinda Safitri , Masruroh Nur Aini , Waluyo Joko
Published: November 2022

The industrial development in Indonesia encourages companies to have high sensitivity in competing to meet consumer demands promptly by considering minimum distribution costs. One of the factors that can affect distribution costs is route determination. Determining the distribution route is the Vehicle Routing Problem (VRP). The purpose of VRP is to arrange the order of distribution routes to produce a minimum total distance. This study aims to determine the fuel distribution route at TBBM Rewulu in one delivery period to obtain the optimal distribution route and minimize the vehicle mileage. Delivery is carried out using three types of tanker trucks with heterogeneous capacities. This study uses a mathematical model of Mixed Integer Linear Programming (MILP) by considering split delivery, multi trips, multi-products, and compartments.The branch and bound method in the LINGO solver has been used to solve this problem. This model was tested on a simple case using data of 8 customers with different distances and demand shipped by truck. The results obtained indicate that no boundaries are violated, and all consumers are served. The mathematical model built is still general, so it can solve similar cases. A model can be developed for further research by adding VRP variants such as time windows and adding the product types to represent the entire existing system.