95 research outputs found
114 - Mahsa Ghorbani
No full textStock price prediction is one of the most challenging problems in finance and is receiving considerable attention from researchers. The literature provides strong evidence that prices can be predicted from past price data as well as other fundamental and macroeconomic variables. We propose a filtering operation using covariance information in order to predict future stock prices. We use daily historical price data for Generals Electric Company to illustrate our method, which shows promising results in terms of the estimation performance and volatility
Vacuum-UV/chlorine advanced oxidation process for micropollutants removal in potable reuse trains
No full textAccess to clean drinking water is a critical issue in many regions of the world due to rapid urbanization, population growth, and climate change. To address this challenge, potable water reuse has emerged as a viable solution, which involves recycling wastewater to produce high-quality drinking water using a multi-barrier approach including micro- or ultra-filtration, reverse osmosis (RO), and advanced oxidation processes (AOPs). As the final step of this process, AOPs play a crucial role by providing effective disinfection and elimination of micropollutants. Thus, enhancements in AOP technology further improve the quality of recycled water and make the reuse strategy more feasible for communities facing water scarcity.
This research investigated the application of vacuum-UV (VUV) as an alternative AOP for treating micropollutants, 1,4-dioxane (1,4-D) and carbamazepine (CBZ), under potable reuse conditions. Kinetic studies were performed in various water matrices, accounting for the presence of monochloramine and free chlorine oxidants, as well as relevant operational parameters.
VUV AOPs have the potential to achieve high treatment efficacy by directly breaking down water molecules at 185 nm, resulting in the generation of •OH. The addition of free chlorine or monochloramine individually hindered the removal of 1,4-D in the corresponding VUV AOPs. However, chlorination of chloramine-containing water significantly improved both the treatment performance and energy efficiency of the AOP. Additionally, the presence of water constituents such as bicarbonate, chloride, and organic matter reduced micropollutants degradation rates. Nevertheless, lower chloride levels were found to improve 1,4-D removal in the presence of free chlorine or chloramine oxidants by promoting the formation of Cl₂•-. In an actual RO permeate matrix, VUV AOPs demonstrated a superior treatment performance for 1,4-D removal compared to the conventionally used UV/H₂O₂ and UV/Cl₂ AOPs. Lastly, kinetic studies and modeling revealed that •OH and Cl₂•- species played a significant role in driving the degradation reactions in the VUV/Cl₂/Chloramine AOP. Overall, this study highlights the potential of VUV AOPs, particularly VUV/Cl₂/Chloramine, as an effective treatment technology for removing micropollutants from water and supporting potable reuse systems.Applied Science, Faculty ofChemical and Biological Engineering, Department ofGraduat
Photochemical Properties of Free Chlorine and Inorganic Chloramines at 185 nm for VUV/UV/Chlorine Advanced Oxidation
No full textVacuum-UV (VUV) irradiation is a
potentially viable advanced oxidation
process (AOP) for water treatment and potable reuse applications due
to high generation of hydroxyl radicals. Under potable reuse conditions,
free chlorine and inorganic chloramines are present in the AOP feed
water and could possibly participate in the photochemical reactions.
The focus of this study is to determine the photochemical parameters
of these species at 185 nm, which are necessary for accurate kinetic
modeling of the VUV process. The measured molar absorption coefficients
at 185 nm for both free chlorine and chloramines are significantly
higher than the values reported at 254 nm, implying that high concentrations
of these oxidants could act as an inner filter to the VUV photons.
Furthermore, kinetic modeling of the process showed that both hypochlorous
acid and hypochlorite ion can undergo direct photolysis at 185 nm
with quantum yields of 0.7 and 0.1 mol/einstein, respectively, while
the direct photolysis of chloramines at this wavelength is negligible.
Overall, water is the major absorber of 185 nm photons in the VUV
AOP and addition of free chlorine enhances radical generation in the
system. Also, low concentration of chloramines relevant to potable
reuse only slightly decreases the treatment efficiency through shielding
and radical scavenging reactions
Sensitivity of Bacteria, Protozoa, Viruses, and Other Microorganisms to Ultraviolet Radiation
No full textData concerning the sensitivity of various organisms to ultraviolet (UV) radiation exposure are very important in the design of UV disinfection equipment. This review analyzes fluence data from almost 250 studies and organizes the data into a set of recommended fluence values for specific log reductions and an appendix containing all the collected data
Nurturing success with learning disabilities in French immersion with teachers' and parents' support and collaboration
No full textThis paper draws upon my six years of teaching French as the second or foreign languages as well as my academic experiences in the Master of Education program. Within the past six years, I have perceived the second language acquisition to be an enjoyable and pleasant journey for all my students similar to what I experienced as a child. However, having faced various learning styles and needs as well as the uncertainty of some parents about the placement of their children with learning disabilities in French Immersion, I gravitated to inquire more into the compatibility of this program for my at-risk students. The French Immersion program is suitable for the students with learning disabilities if they can be provided with proper support in positive and motivating learning environments, such as school and home. This knowledge would benefit the teachers and parents who need to be ensured that the inclusion of the students with learning difficulties in French Immersion is educationally sound. Through the analysis of different strategies and accommodations, this paper discusses how the students with learning disabilities and their families can address their concerns and avoid some challenges, such as transition to English-only programs after having built several years of connections and friendships and the associated social-emotional impacts. This paper also seeks to convey the message to the teachers that learning disability should not hinder language acquisition. The implications emerged from this awareness are that educators and parents can advocate for the students with learning disabilities through their collaborative efforts, so that they can have equitable access to learning French in supportive and inspirational learning environments.Not peer reviewedcapstoneFrench immersionlearning disabilitysecond language acquisitioninclusionary practiceshome-school collaborationhome-school collaboratio
Structural changes of conversion metal fluoride cathodes in lithium ion batteries
No full textCurrently, cathode materials for Li-ion batteries are based on intercalation processes where, during charge and discharge processes, Li intercalates into the crystal lattice while maintaining the host crystal structure. More recently, new cathode materials have been introduced based on conversion reactions involving phase transformation and complete reduction of the host transition metal. In addition, conversion reactions involve two or more Li ions with a resulting much higher capacity than obtainable for intercalation materials. However, mechanism of phase transformation and cycling reversibility are at present still poorly understood. In this study transmission electron microscopy (TEM) techniques including selected area electron diffraction (SAED) pattern, annular dark field (ADF) STEM image, and electron energy loss spectroscopy (EELS) with nanoscale spatial resolution were used to study the phase evolution and structural changes of iron fluorides (FeFe2, FeO0.7F1.3, FeF3) after various discharge/charge cycles. Additionally, the changes of the Fe valence states upon cycling were determined using EELS by measuring the L3/L2 intensity ratio of Fe-L edge. The structural transformations of FeO0.7F1.3 during the first lithiation show that litiahation contains two regions. The first region, lithiation is an intercalation reaction iii with reduction of Fe3+ to Fe2+. The second region of lithiation involves a conversion reaction, with the formation of metallic Fe, LiF, and Li0.7Fe2+0.5O0.7F0.3 (rocksalt type) phases. The first delithiation process follows a different conversion reaction path compared to the first lithiation reaction involving the formation an amorphous rutile-type phase along with with the rocksalt-type phase. Interestingly, upon full recharge (delithiated electrode), the measured average Fe valence state returns back to its initial value of Fe2.7+. The growth of a solid electrolyte interphase (SEI) layer formation at the electrode/electrolyte interface is observed for the iron fluoride compounds (FeF2, FeF3, and FeOF) after cycling. The evolution of the SEI layer formation after cycling has been studied for the FeF2 samples in details by EELS and XPS. We observed the growth of SEI layer with cycle number, which mainly contained LiF and Li2CO3 compounds. Two degradation mechanisms are identified. First, the increase in the decomposition product layer after cycling inhibits complete reconversion process. Second, dissolution of Fe into the SEI layer after cycling which leads to the loss of active material.Ph.D.Includes bibliographical referencesby Mahsa Sin
Nutrition and wound healing: vitamins
Full text linkSufficient nutrition is important for all medical surgical patients. In the clinical setting, many patients postoperative receive multivitamin and minerals to maintain adequate nutrition. This poster presentation will address the importance of supplementary vitamins to wound healing. Complications of delay wound healing includes adhesions, contractures, dehiscence, evisceration, granulation tissue, fistula formation, Infection, hemorrhage, formation of
hypertrophic scars and keloids (Lewis, Dirksen, Heitkemper, Bucher, & Camera, 2014). Conclusion: through this project we have learned that malnutrition contributes to delayed wound healing. Each vitamin we have discussed plays an important role in each stage of the healing process: inflammatory, proliferative and remodeling phase. Based on our literature review, patients who were receiving nutritional supplementation displayed a significant decrease in wound size as compared to those who did not. We now have a better understanding of supplemental nutrition (vitamins) on post surgical patients in our clinical setting and will further promote these findings through patient teaching.Not peer reviewedStudent Research Day Poster (2017
Triggering Social Entrepreneurship Initiatives: Investigating the role of Dutch national government policy in triggering social entrepreneurship initiatives focusing on delivering affordable owner-occupied housing
No full textThe Netherlands is currently facing a shortage of affordable housing, specifically for middle-income households. These households with too much income to qualify for social housing but not enough to buy a home tend to squeeze into the free rental market increasingly. Housing specifically targeted at this group is known as intermediate housing, which is provided at a cost above social rent but below market rates. In previous years, very few houses for this target group were developed due to the reluctance of the market to develop these homes due to lower profitability and strict regulations that made it difficult for local governments and social housing associations to build and distribute intermediate housing. This study's primary goal is to reduce the inequality gap in the Dutch housing market by designing a national government housing policy. As a response to the shortage of affordable housing among middle-income households, it has been proposed that more social enterprises should become active in the housing sector as well as in other industries which solve societal problems by combining economic mission and societal impact. Social housing enterprises can explicitly address the shortage of affordable housing for middle-income households, unlike commercial ones that are solely concerned with profits. Furthermore, these newly developed Social Housing Enterprises are not subject to strict rules regarding the distribution of housing to middle-income households. As a result, they might be able to address the housing shortage.The research question is "How can national government policy trigger social entrepreneurship initiatives focusing on delivering affordable owner-occupied housing?". For this research, a qualitative approach has been taken, in which primary and secondary data are used. The primary data came from ten semi-structured in-depth interviews, and the secondary data came from the literature review. In general, the national government's involvement increases the likelihood of individuals engaging in Social Entrepreneurship and its formation. The result showed that government support for removing barriers to social enterprise creation was the most important factor driving social entrepreneurship. Governments can lower barriers to social enterprises in the provision of intermediate housing by giving formal recognition, improving access to markets and finances, providing in-kind resources, and strengthening skills to trigger social entrepreneurship initiatives focusing on delivering affordable owner-occupied housing.Graduation laboratoryArchitecture, Urbanism and Building Sciences | Management in the Built Environmen
Electrospun core-shell nanofibers based on thermoplastic urethane elastomer and gelatin: Evolution of cell behavior
No full textKinerja Pendamping Desa dalam Pemberdayaan Masyarakat Desa di Kecamatan Wringin Kabupaten Bondowoso
Full text linkPendamping Desa adalah sebuah jabatan dibawah Kementerian Desa, Pembangunan Daerah Tertinggal Dan Transmigrasi Indonesia yang pembentukannya berdasarkan Undang-Undang Desa dan bertugas untuk meningkatkan keberdayaan masyarakat di sebuah Desa. Pendamping Desa sebagaimana disebutkan dalam Permendesa Nomor 3 Tahun 2015 menyebutkan bahwa pendampingan Desa dilaksanakan oleh pendamping yang terdiri dari: Tenaga Pendamping Profesional, Kader Pemberdayaan Masyarakat Desa, dan Pihak Ketiga. Tipe penelitian yang digunakan oleh penulis adalah tipe kualitatif yang dideskriptifkan yaitu suatu penelitian yang bertujuan untuk memperoleh gambaran serta memahami dan menjelaskan bagaimana Kinerja Pendamping Desa dalam Pemberdayaan Masyarakat desa di Kecamatan Wringin Kabupaten Bondowoso. Hasil penelitian ini menunjukkan bahwa kinerja pendamping desa sudah maksimal. Pada indikator (kualitas) dan (kuantitas) pendamping Desa Wringin sangat baik kualitas pendampinganya dan di kecamatan wringin jumlah pendamping desa dan SDM sudah sesuai kebutuhan. (ketetapan waktu) pendamping desa dalam pembuatan laporan sudah sangat akurat dan tepat waktu. (efektivitas) dalam proses pendampingan di 13 desa yang ada di Kecamatan Wringin pendamping desa sudah sangat efektif. (Kemandirian) Pendamping desa di kecamatan wringin melakukan proses pendampingan dengan mandiri tanpa bantuan orang lain karna sudah memiliki kemampuan masing-masing. (Komitmen kerja) pendamping desa komitmen kerja dan tanggung jawabnya sudah sangat baik. Sedangkan faktor yang mempengaruhi kinerja, pada faktor kualitas dan kemampuan sudah sangat baik. selanjutnya sarana pendukung sudah tersedia dalam pelaksanaan pendampingan desa.
Kata Kunci : Kinerja, Pendamping Desa, Pemberdayaan
ABSTRACT
Nama : Izzan Aufa Mahsa Arifin
Study Program : Social and Political Sciences
Title : The Performance Of Village Facilitators in Empowering Village Communities In Wringin District, Bondowoso Regency
Village Assistant is a position under the Ministry of Villages, Disadvantaged Areas and Transmigration of Indonesia, which is formed based on the Village Law and is tasked with increasing community empowerment in a village. Village Facilitators as mentioned in Permendesa No.3 of 2015 state that Village assistance is carried out by assistants consisting of: Professional Assistants, Village Community Empowerment Cadres, and Third Parties. The type of research used by the author is descriptive qualitative type, namely a study that aims to obtain an overview and understand and explain how the Village Facilitator's Performance in Village Community Empowerment in Wringin District, Bondowoso Regency. The results of this study indicate that the performance of village assistants has been maximal. In the indicators (Quality) and (quantity) of the village assistants in wringin, the quality of the assistants is very good and in the Wringin sub-district the number of village assistants and human resources is according to the needs. (Timeliness) village assistants in making reports are very accurate and on time. (Effectiveness) in the mentoring process in 13 villages in the Wringin sub-district the village assistants have been very effective. (Independence) Village facilitators in Wringin sub-district carry out the mentoring process independently without the help of others because they already have their respective abilities. (Work commitment) village assistant, work commitment and responsibility are very good. While the factors that affect performance, the quality and ability factors are very good. Furthermore, supporting facilities are available in the implementation of village assistance.
Keywords: Performance, Village Facilitators, Empowermen
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