Gazi University Dspace
Not a member yet
26981 research outputs found
Sort by
OAN: outlier record-oriented utility-based privacy preserving model
Data privacy is a hard trade-off problem between privacy level and data
utility. Anonymization is one of the most commonly used utility-based
solutions for preserving data privacy. The existence of outliers in data
set decreases data utility in anonymization. Hence, outliers should be
managed in the anonymization process. In traditional approaches,
outliers are detected after anonymization and they are partially or
completely removed from the published data set. However, detection of
outliers after anonymization increases computational cost and the
removal of the outliers from the data set reduces total utility. In this
study, a new outlier record-oriented utility-based privacy-preserving
model named as OAN, which reduces the computational cost by detecting
outliers before anonymization and increases data utility by using all
data, was proposed. It was shown that OAN is an effective solution in
terms of computational cost compared to another utility-based model.
According to the experimental results, it was observed that the proposed
model increased total data utility while preserving the privacy of data
Turkish Medical Oncology Society COVID-19 Pandemic Advisory Board Recommendations for Cancer Patients and Medical Oncologist
Liquid and gas phase mass transfer coefficients and interfacial area in a column equipped with structured packing
Studies on CO2 removal and structured packed columns have been prominent
in recent years. This study, as the first stage on this subject,
involves characterization studies including hydrodynamics and mass
transfer coefficients of a new genuine structured packed column designed
and manufactured by our own facilities, which can be used for this
purpose. Firstly, the maximum and minimum limits of the gas and liquid
velocities that can be employed in the column were determined by
specifying the loading and flooding points through pressure drop
measurements. Accordingly, the superficial velocity ranges for liquid
and gas were identified as 0.002-0.0047 {[}m/s] and 0.07-0.68 {[}m/s],
respectively. The individual volumetric physical mass transfer
coefficients of the liquid side (k(L)(0)a) and gas side (k(c)(0)a) were
obtained experimentally in these ranges. Overall volumetric physical
mass transfer coefficients (K(c)(0)a) were calculated for CO2-water
system according to the two-resistance theory. The experiments were also
performed with CO2-NaOH system, and overall volumetric chemical mass
transfer coefficients (K(c)a), Hatta number (Ha) and enhancement factor
(E) were determined. The experimental findings indicated that the fast
pseudo-first order reaction regime was acceptable for this chemical
absorption. Finally, the effective interfacial area (a(eff)) values were
also determined at different gas and liquid velocities
Socioeconomic factors and sustainable forage crops production in Turkey Aegean region: A multivariate modeling
Multicenter study of levodopa carbidopa intestinal gel in Parkinson’s disease: The Turkish experience
Biosorption, isotherm and kinetic properties of common textile dye by Phormidium animale
In this study, the potential textile dye biosorption capacity of a
low-cost biosorbent (P. animale) was tested as functions of pH,
biosorbent type, initial dye concentration, temperature, contact time
and biosorbent dosage at batch scale level. The optimal conditions are
2, dried biosorbent, 93.16 mg/L, 45 degrees C, 1440 minutes and 4 g/L
for pH, biosorbent type, initial dye concentration, temperature, contact
time and adsorbent dosage, respectively. Dried P. animale removed 99.66
\% of Remazol Black B (RBB). The isotherm and kinetic models were
analyzed for biosorption mechanism and characteristic. According to the
results, Langmuir isotherm and pseudo second order kinetic models were
compatible with the experimental data obtained for RBB biosorption on
algal biosorbent. Also FTIR and elemental analysis were done and
resulted that the functional groups on the surface of algae had
significant role in biosorption process. The results of this study
supported that P. animale is an effective, inexpensive and eco-friendly
biosorbent for treatment of textile dye wastewater
Nasopharyngeal pneumococcal carriage in healthy Turkish children after 13-valent conjugated pneumococcal vaccine implementation in the national immunization program
Background: In Turkey, pneumococcal conjugated vaccine (PCV) was
introduced to the national immunization program as PCV7 in 2008, and was
replaced with PCV13 in 2011. The aims of this study wereto investigate
the effects of PCV13 on nasopharyngeal pneumococcal carriage (NPC) by
determining theserotype distribution, and to identify risk factors for
carriage, in healthy Turkish children. Methods: This prospective study
was conducted on 500 healthy children aged 0-13 years between Apriland
November 2014. Nasopharyngeal swab samples were taken, and molecular
method for capsularserotyping was performed by multiplex PCR. Results:
Of 500 children, 43.4\% were unvaccinated with a PCV (7- or 13-valent),
56.6\% were vaccinatedand The NPC rate was found to be 9.8\%. Of 49
positive Streptococcus pneumoniae isolates, 26 (53\%) werePCV13 vaccine
strains (VSs), and 17 (34.7\%) were non-VS. Six isolates (12.2\%) were
not typeable by themethod applied. The most common serotypes detected
were serotype 3 (18.3\%), serotype 19F (14.2\%), serotype 6A/B (8.1\%),
serotype 11A (8.1\%), and serotype 15B (8.1\%). The total coverage rate
of the PCV13serotypes was 60.4\%. Conclusion: A significant decrease in
carriage rate was detected within three years after the introductionof
PCV13 in Turkey. However, the nasopharyngeal carriage of PCV13 strains
was found to be interestinglyhigh. (c) 2019 The Authors. Published by
Elsevier Ltd on behalf of King Saud Bin Abdulaziz University forHealth
Sciences. This is an open access article under the CC BY-NC-ND license
(http://creativecommons. org/licenses/by-nc-nd/4.0/)