scholarly journals Studi On Person Over Board dalam Pendidikan dan Pelatihan Maritim di Polimarin Semarang

2020 ◽  
Vol 6 (2) ◽  
pp. 32-41
Author(s):  
P. Tony Kusumartono ◽  
Hero Budi Santoso ◽  
Noviarianto Noviarianto
Keyword(s):  
Negative Impact ◽  
Time Factor ◽  
Crew Member ◽  
Student Responses ◽  
Motion Data ◽  
Ship Maneuverability ◽  
Time Distance ◽  
Vessel Motion

Person Over Board (POB) is one of the emergencies that still occurs on board, a passenger or crew member falls into the sea. This situation is very dangerous if it occurs in the middle of the ocean or in cold waters because of hypothermia which can cause unconsciousness and death within minutes. This research focuses on investigating the improvement of the response of polytechnic students during emergencies, namely Person over board (POB) with the support of manouver onboard training in Bridge Simulator as well as making decisions on safe maneuvering and precise ship response manouvre in POB rescue actions. This study uses descriptive methods to assess ship manouvre training especially when person over board (POB) among Indonesian maritime polytechnic students, which are designed for students and researchers to gather information about the conditions needed in the field of nautical studies. The rescue attempts of the Anderson, Williamson and Scharnow model of rescue turn are carried out in radar and arpa simulators, student responses with the support of manual maneuvers on board and vessel motion data which include time, distance, speed and direction of the ship or angle of target bearing. The accuracy of student responses made during a POB emergency does not always comply with the instructions in the Manouvre on Board manual. Errors occur at the beginning of the maneuver which could mean a negative impact that endangers POB safety. Safe and precise ship maneuverability in the POB situation is influenced by the time factor of the incident and when the POB is known.

scholarly journals REDUKSI AKTIVITAS URANIUM DALAM LIMBAH RADIOAKTIF CAIR MENGGUNAKAN PROSES ELEKTROKOAGULASI

2017 ◽  
Vol 22 (3) ◽  
Author(s):  
Prayitno Prayitno ◽  
Vemi Ridantami ◽  
Imam Prayogo
Keyword(s):  
Waste Treatment ◽  
Negative Impact ◽  
Liquid Waste ◽  
Electrode Spacing ◽  
Material Development ◽  
Process Waste ◽  
Industrial Material ◽  
Long Time ◽  
Electrocoagulation Process ◽  
Time Distance

REDUKSI AKTIVITAS URANIUM DALAM LIMBAH RADIOAKTIF CAIR MENGGUNAKAN PROSES ELEKTROKOAGULASI. Limbah yang dihasilkan dari proses pengembangan bahan industri bersifat radioaktif yang mengandung uranium yang dapat menimbulkan dampak negatif pada manusia dan lingkungan. Pengolahan limbah radioaktif pada saat ini masih banyak menggunakan bahan-bahan kimia.Penambahanbahan kimiauntuk mereduksi bahan pencemar dinilai kurang efisien karena kurang ramah lingkungan, memerlukan waktu yang lama, dan biaya yang mahal. Untuk itu akan diterapkan metode proses elektrokoagulasi untuk menurunkan aktivitas uranium dari larutan limbah cair. Tujuan penelitian ini adalah untuk mengetahui efisiensi penurunan aktivitas uranium dalam limbah radioaktif cair yang dihasilkan pada proses elektrokoagulasi dengan variasi tegangan, waktu tinggal, jarak elektroda dan pH inlet limbah. Limbah simulasi yang digunakan memiliki kadar kontaminan uranium sebesar 500 mg/L. Percobaan ini dilakukan dengan metode batch dengan elektroda aluminium. Hasil penelitian diperoleh parameter optimal pada tegangan 12,50 V, jarak 1 cm, pH 7, dan waktu proses selama 60 menit diperoleh efisiensi penurunan limbah uranium sebesar 97,20 %.Kata Kunci:elektrokoagulasi, reduksi limbah uranium, tegangan, aluminium. REDUCTION OF URANIUM ACTIVITIES IN LIQUID WASTE RADIOACTIVE BY USING OF ELCTROCOAGULATION PROCESS.  Waste generated from the process of the industrial material development one of which waste containing uranium radioactive, can have negative impact on humans and the environment. In  the present time, chemicals are still mostly use in radioactive waste treatment. To reduce pollutants with the use of chemicals is less efficient, because less environmentally friendly, take long time and costly. Therefore, a system of electrocoagulation process will be applied to decrease the activity of uranium from waste solution. The purpose of this study is to determine the efficiency of uranium activity decrease in waste water which is produced in the electrolysis process is conducted with voltage variations, the dwelling time, electrode spacing, and the waste inlet pH. The waste that will be treated has uranium contaminant levels of 500 mg/L. The experiment was conducted by a batch system with aluminum electrodes. Parameters affecting electrocoagulation process, such as voltage, time, distance electrode, and the pH have been studied and the best voltage optimization condition has been obtained of 12.50 V, a distance of 1 cm, pH 7, and in the processing time of 60 minutes efficiency of 97.20 % was obtained.Keywords: electrocoagulation, reduction of uranium waste, voltage, aluminium.

Comparison of Real-Time Measured and Predicted Wellhead Fatigue Performance in a Deepwater Drilling Operation

2015 ◽  
Author(s):  
James Mackenzie ◽  
Neil Murdoch ◽  
Stuart Killbourn
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Fatigue Damage ◽  
Angular Rate ◽  
Fe Analysis ◽  
Processing Unit ◽  
Real Time Monitoring ◽  
Drilling Operation ◽  
Motion Data ◽  
Vessel Motion

This paper discusses the use of a real-time monitoring system to track wave driven fatigue damage at critical locations in a subsea well during a 290-day drilling operation in the Mediterranean Sea. Real-time monitoring was employed due to up-front finite element (FE) analysis predicting fatigue damage rates of sufficient magnitude that the required safety factor would not be met. LMRP/BOP motions were recorded using two subsea monitoring units (each containing accelerometers and angular rate sensors). These were installed on the LMRP and above the lower flex joint. The accelerometer signals were used to deduce the static inclination of the well and the angular rate signals the dynamic inclination due to vessel motion and wave loading on the riser. Data was transmitted in real-time to a central processing unit on board the vessel. This converted the motion data into fatigue damage accumulation using non-linear transfer functions derived from the FE model. The damage was displayed in a simplified format for use in decision-making. The recorded data revealed the motions of the LMRP/BOP and hence the damage rates in the well to be considerably less than predicted by the FE analysis. The damage rates derived from the monitoring system therefore served as a continuously updating demonstration that an acceptable margin of safety against suffering a fatigue failure was being maintained thus permitting drilling to proceed safely. A subsequent benchmarking study which additionally involved processing of recorded vessel motion data, current data and seastate data was undertaken to identify possible reasons for the differences between the predicted and measured LMRP/BOP motions. This showed that conservative assumptions made on the soil stiffness (due to limited availability of data), differences between the predicted and measured riser natural periods and differences between the predicted and measured vessel motions all contributed to the LMRP/BOP motions and hence the damage rates predicted by the up-front FE analysis being larger than measured in the field. The systematic identification of the factors which contributed to the differences between the predicted and measured response is described in this paper. Areas where further work would be of value to help improve the reliability of up-front, analytically predicted fatigue damage rates are also discussed.

scholarly journals Az első onkológiai ellátás időfaktorának szerepe a daganatos betegségek túlélési mutatóiban. Irodalmi áttekintés

2018 ◽  
Vol 159 (14) ◽  
pp. 535-546
Author(s):  
László Mangel ◽  
Tamás Tornóczky ◽  
Antal Zemplényi ◽  
Imre Boncz
Keyword(s):  
Negative Impact ◽  
Treatment Decision ◽  
Time Factor ◽  
Cancer Therapies ◽  
Biological Behaviour ◽  
Leading Role ◽  
Oncology Treatment ◽  
Cancer Types ◽  
Survival Effect ◽  
Cancer Diseases

Abstract: The aim of this study was to survey the effects of the waiting time for the first oncology treatment in cancer diseases. By the analysis of 67 retrospective studies and reviews the numerical effects of treatment initiation time on survival were assessed. The “time factor” has a leading role on cancer types with aggressive biological behaviour, like breast cancer in younger age, testicular cancers, or head and neck tumours. However, a few days and reasonable delay to the first oncology intervention has no negative impact in numerous cancer diseases. The course of the primary check-up could be modified by several medical and psychosocial factors, and many times the treatment of the most advanced cancers are privileged causing an inverse survival effect. The effectiveness of the cancer therapies is determined by the optimal treatment decision, however, further research is necessary for the determination of the exact role of the “time factor” in oncology. Orv Hetil. 2018; 159(14): 535–546.

Mitochondrial hyperfusion: a friend or a foe

2020 ◽  
Vol 48 (2) ◽  
pp. 631-644 ◽  
Author(s):  
Rajdeep Das ◽  
Oishee Chakrabarti
Keyword(s):  
Negative Impact ◽  
Cellular Stress ◽  
Cellular Homeostasis ◽  
Mitochondrial Population

The cellular mitochondrial population undergoes repeated cycles of fission and fusion to maintain its integrity, as well as overall cellular homeostasis. While equilibrium usually exists between the fission–fusion dynamics, their rates are influenced by organellar and cellular metabolic and pathogenic conditions. Under conditions of cellular stress, there is a disruption of this fission and fusion balance and mitochondria undergo either increased fusion, forming a hyperfused meshwork or excessive fission to counteract stress and remove damaged mitochondria via mitophagy. While some previous reports suggest that hyperfusion is initiated to ameliorate cellular stress, recent studies show its negative impact on cellular health in disease conditions. The exact mechanism of mitochondrial hyperfusion and its role in maintaining cellular health and homeostasis, however, remain unclear. In this review, we aim to highlight the different aspects of mitochondrial hyperfusion in either promoting or mitigating stress and also its role in immunity and diseases.

Postgraduate Specialization Fellowship Training for Audiologists: Survey Results From Educators, Supervisors, and Students

2020 ◽  
Vol 29 (2) ◽  
pp. 290-299
Author(s):  
Julie G. Arenberg ◽  
Ray H. Hull ◽  
Lisa Hunter
Keyword(s):  
Fellowship Training ◽  
Professional Organization ◽  
Student Responses ◽  
Academic Affiliation ◽  
Job Opportunities ◽  
Working Groups ◽  
Survey Results ◽  
Active Research ◽  
Funding Opportunities ◽  
Exceptional Patient

Purpose From the Audiology Education Summit held in 2017, several working groups were formed to explore ideas about improving the quality and consistency in graduate education in audiology and externship training. The results are described here from one of the working groups formed to examine postgraduate specialization fellowships. Method Over the course of a year, the committee designed and implemented two surveys: one directed toward faculty and one toward students. The rationale for the survey and the results are presented. Comparisons between faculty and student responses are made for similar questions. Results Overall, the results demonstrate that the majority of both students and faculty believe that postgraduation specialization fellowships are needed for either 1 year or a flexible length. There was a consensus of opinion that the fellowship should be paid, as these would be designed for licensed audiologists. Most believed that the fellowships should be “governed by a professional organization (e.g., American Speech-Language-Hearing Association, American Academy of Audiology, American Doctors of Audiology, etc.),” or less so, a “separate body for this specific purpose.” Potential topics for specialization identified were the following: tinnitus, vestibular, cochlear implants, pediatrics, and intraoperative monitoring. The highest priority attributes for a specialization site were “abundant access to patient populations,” “staff of clinical experts,” and “active research.” The weight put toward these attributes differed between faculty and students with faculty prioritizing “university/academic centers,” and “access to academic coursework in the fellowship area.” The faculty rated “caseload diversity,” “minimum hours,” “research,” and “academic affiliation” as requirements for a fellowship site, with less weight for “coursework” and “other.” Finally, the students valued “improved personal ability to provide exceptional patient care,” “the potential for increased job opportunities,” and the “potential for a higher salary” as benefits most important to them, with lower ratings for “recognition as a subject matter expert” or “potential pathway to Ph.D. program.” Conclusions As a result of the survey, further exploration of a postgraduate specialization fellowship is warranted, especially to determine funding opportunities to offset cost for the sites and to ensure that fellows are paid adequately.

Health Communication: Implications for Diverse Populations

2011 ◽  
Vol 18 (1) ◽  
pp. 12-19
Author(s):  
Amy Hasselkus
Keyword(s):  
Health Care ◽  
Health Communication ◽  
Negative Impact ◽  
Linguistically Diverse ◽  
Good Health ◽  
The United States ◽  
Poor Health ◽  
Health Care Decisions ◽  
Diverse Backgrounds ◽  
Health Related

The need for improved communication about health-related topics is evident in statistics about the health literacy of adults living in the United States. The negative impact of poor health communication is huge, resulting in poor health outcomes, health disparities, and high health care costs. The importance of good health communication is relevant to all patient populations, including those from culturally and linguistically diverse backgrounds. Efforts are underway at all levels, from individual professionals to the federal government, to improve the information patients receive so that they can make appropriate health care decisions. This article describes these efforts and discusses how speech-language pathologists and audiologists may be impacted.

Sign in / Sign up

Export Citation Format

Share Document