Nadia Karim - Academia.edu (original) (raw)

Papers by Nadia Karim

TELKOMNIKA (Telecommunication Computing Electronics and Control)

Since the concept of coverless information hiding was proposed, it has been greatly developed due... more Since the concept of coverless information hiding was proposed, it has been greatly developed due to its effectiveness of resisting the steganographic tools. In this paper, a new coverless steganography is presented to hide the secret data in a more secure way and to enhance the robustness against attacks. This method depends on frequency domain. The embedding process consists of several steps. Firstly, the secret data is divided into no overlapping segments. Secondly, a set of images is collected to find appropriate images to be stego images. Thirdly, to build a hash sequence for an image, a powerful hashing algorithm is used. Fourthly, for each image hash sequence, the inverted index structure is created. Fifthly, choose the image which its hash equivalent to the secret data segment. Several tests are done to measure the robustness of the proposed method. The results of the experiments reveal that the proposed strategy is resistant to a variety of image processing attacks such as joint photographic experts group (JPEG) compression, noise, low pass filtering, scaling, rotation and median and mean filter, brightness, and sharpening.

User definitions of recovery from psychosis consider recovery to be an idiosyncratic process wher... more User definitions of recovery from psychosis consider recovery to be an idiosyncratic process where internal factors such as hope and empowerment are important. Furthermore, unlike 'clinical' recovery, 'user-defined' recovery suggests that absence of 'symptoms' is not necessary for recovery to occur. The current study examined whether subjective factors such as hope and empowerment are linked to recovery fi*from psychosis and whether these factors are important in predicting user-defined recovery.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

International Labor Organization warns that shortage of skilled employees and a low worker commit... more International Labor Organization warns that shortage of skilled employees and a low worker commitment are the most frequently cited problems facing by the hospitality industry by both the trade itself and by industry practitioners. Hence, organizations need to strategize its employee’s retention activities to minimize the employee turnover. One of the strategies is through organizational employer branding. The purpose of this study is to examine the construct validity of an Organizational Employer Branding (OEB) scale. Results from content adequacy, reliability, aggregation, convergent, discriminant, and criterion-related validity assessments confirm that Brand Awareness, Brand Value and Brand Meaning are the final dimensions of OEB. The results also provide support for the measure to be used in further research on the influence of organizational employer branding to employee commitment in Malaysian hotel industry. Keywords— Organizational employer branding (OEB), construct validity...

Research and Reports in Tropical Medicine, 2021

Plasmodium vivax (P. vivax) is a protozoan parasite that causes vivax malaria. Disease relapse po... more Plasmodium vivax (P. vivax) is a protozoan parasite that causes vivax malaria. Disease relapse post-treatment is reported in P. vivax co-infection with other bacterial and parasitic infections, but Plasmodium vivax reactivation is not very common with viral infections. Early recognition and diagnosis of a Plasmodium vivax malaria relapse in a nonendemic region pose a diagnostic dilemma. COVID-19 co-infection compounds this dilemma due to overlapping symptoms. Early diagnosis and treatment are essential for a favorable clinical outcome. We report a middle-aged gentleman with high-grade fever and headaches who had COVID-19 and was found to have a relapse of Plasmodium vivax malaria.

Asian Journal of Neurosurgery, 2021

Objective: Telephone triage is a system in which trained nurses use standardized protocols to eva... more Objective: Telephone triage is a system in which trained nurses use standardized protocols to evaluate symptoms over the phone and determine the appropriate course of action. Materials and Methods: We implemented a protocol for systematic follow up phone calls and telephonic triage to families of neurology and neurosurgery patients after discharge, primarily to improve care transition and to assess its impact on the ratio of visits in the emergency department, readmissions, and overall satisfaction of patients and families. The intervention comprised the implementation of nurse led telephone triage and postdischarge follow up phone calls. After implementing hotline services in mind and brain service line, a retrospective cohort study was conducted to evaluate the impact of hotline services on patient readmissions, emergency department visits, and overall satisfaction rate. We collected data of readmission rate and emergency visits of discharge patients in three periods a prehotline ...

Journal of the College of Physicians and Surgeons Pakistan, 2019

In psychiatry, agitated / aggressive patients are often treated with de-escalation techniques. If... more In psychiatry, agitated / aggressive patients are often treated with de-escalation techniques. If this does not work, physical or chemical restrains are required; but in the event of resistance, seclusion is applied. We report the findings of baseline study of experiences of physical and chemical restraints in a tertiary care hospital in Karachi, where 104 files were evaluated retrospectively. The mean age of patients was 32.5 ±14.3 years with 54.8% men, while the average length of stay was 11.5 ±9.3 days. Agitation, violent behaviour, and aggression were the most common indications for restraints. In total, 94.5% of patients had both physical and chemical restraints with the latter being used as the first choice in 70 patients; whereas, 67.1% of patients' families were not informed before application of restraints. The seclusion need assessment was conducted in 4.1% of patients.

British journal of haematology, Jul 25, 2017

Rituximab is an effective therapy resulting in a platelet count improvement in 60% of patients wi... more Rituximab is an effective therapy resulting in a platelet count improvement in 60% of patients with immune thrombocytopenia (ITP). Rituximab depletes B cells; thus, a reduction in platelet autoantibody levels would be anticipated in patients who achieve a clinical response to this treatment. The objectives of this study were to determine whether rituximab was associated with a reduction in platelet autoantibody levels, and to correlate the loss of autoantibodies with the achievement of a treatment response. We performed a case-control study nested within a previous randomized controlled trial of standard therapy plus adjuvant rituximab or placebo. We measured platelet-bound anti-glycoprotein (GP) IIbIIIa and anti-GPIbIX using the antigen capture test. Of 55 evaluable patients, 25 (45%) had a detectable platelet autoantibody at baseline. Rituximab was associated with a significant reduction in anti-GPIIbIIIa levels (P = 0·02) but not anti-GPIbIX levels (P = 0·51) compared with placeb...

Transfusion, May 12, 2016

Cultured megakaryocytes could prove useful in the study of human diseases, but it is difficult to... more Cultured megakaryocytes could prove useful in the study of human diseases, but it is difficult to produce sufficient numbers for study. We describe and evaluate the use of an expansion process to develop mature megakaryocytes from peripheral blood-derived human hematopoietic stem and progenitor cells (HSPCs). HSPCs (CD34+) were isolated from peripheral blood by positive selection and expanded using an optimal CD34+ expansion supplement. We evaluated megakaryocyte growth, maturation, and morphology in response to thrombopoietin (TPO) stimulation using flow cytometry and electron microscopy. TPO demonstrated a dose-dependent stimulatory effect on both megakaryocyte number and maturation. From 90 to 120 mL of unmanipulated peripheral blood, we isolated a mean of 1.5 × 10(5) HSPCs (1.5 × 10(3) cells/mL of whole blood). HSPCs expanded nine-fold after a 4-day culture using an expansion supplement. Expanded cells were cultured for an additional 8 days with TPO (20 ng/mL), which resulted in...

TELKOMNIKA (Telecommunication Computing Electronics and Control)

Since the concept of coverless information hiding was proposed, it has been greatly developed due... more Since the concept of coverless information hiding was proposed, it has been greatly developed due to its effectiveness of resisting the steganographic tools. In this paper, a new coverless steganography is presented to hide the secret data in a more secure way and to enhance the robustness against attacks. This method depends on frequency domain. The embedding process consists of several steps. Firstly, the secret data is divided into no overlapping segments. Secondly, a set of images is collected to find appropriate images to be stego images. Thirdly, to build a hash sequence for an image, a powerful hashing algorithm is used. Fourthly, for each image hash sequence, the inverted index structure is created. Fifthly, choose the image which its hash equivalent to the secret data segment. Several tests are done to measure the robustness of the proposed method. The results of the experiments reveal that the proposed strategy is resistant to a variety of image processing attacks such as joint photographic experts group (JPEG) compression, noise, low pass filtering, scaling, rotation and median and mean filter, brightness, and sharpening.

User definitions of recovery from psychosis consider recovery to be an idiosyncratic process wher... more User definitions of recovery from psychosis consider recovery to be an idiosyncratic process where internal factors such as hope and empowerment are important. Furthermore, unlike 'clinical' recovery, 'user-defined' recovery suggests that absence of 'symptoms' is not necessary for recovery to occur. The current study examined whether subjective factors such as hope and empowerment are linked to recovery fi*from psychosis and whether these factors are important in predicting user-defined recovery.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

International Labor Organization warns that shortage of skilled employees and a low worker commit... more International Labor Organization warns that shortage of skilled employees and a low worker commitment are the most frequently cited problems facing by the hospitality industry by both the trade itself and by industry practitioners. Hence, organizations need to strategize its employee’s retention activities to minimize the employee turnover. One of the strategies is through organizational employer branding. The purpose of this study is to examine the construct validity of an Organizational Employer Branding (OEB) scale. Results from content adequacy, reliability, aggregation, convergent, discriminant, and criterion-related validity assessments confirm that Brand Awareness, Brand Value and Brand Meaning are the final dimensions of OEB. The results also provide support for the measure to be used in further research on the influence of organizational employer branding to employee commitment in Malaysian hotel industry. Keywords— Organizational employer branding (OEB), construct validity...

Research and Reports in Tropical Medicine, 2021

Plasmodium vivax (P. vivax) is a protozoan parasite that causes vivax malaria. Disease relapse po... more Plasmodium vivax (P. vivax) is a protozoan parasite that causes vivax malaria. Disease relapse post-treatment is reported in P. vivax co-infection with other bacterial and parasitic infections, but Plasmodium vivax reactivation is not very common with viral infections. Early recognition and diagnosis of a Plasmodium vivax malaria relapse in a nonendemic region pose a diagnostic dilemma. COVID-19 co-infection compounds this dilemma due to overlapping symptoms. Early diagnosis and treatment are essential for a favorable clinical outcome. We report a middle-aged gentleman with high-grade fever and headaches who had COVID-19 and was found to have a relapse of Plasmodium vivax malaria.

Asian Journal of Neurosurgery, 2021

Objective: Telephone triage is a system in which trained nurses use standardized protocols to eva... more Objective: Telephone triage is a system in which trained nurses use standardized protocols to evaluate symptoms over the phone and determine the appropriate course of action. Materials and Methods: We implemented a protocol for systematic follow up phone calls and telephonic triage to families of neurology and neurosurgery patients after discharge, primarily to improve care transition and to assess its impact on the ratio of visits in the emergency department, readmissions, and overall satisfaction of patients and families. The intervention comprised the implementation of nurse led telephone triage and postdischarge follow up phone calls. After implementing hotline services in mind and brain service line, a retrospective cohort study was conducted to evaluate the impact of hotline services on patient readmissions, emergency department visits, and overall satisfaction rate. We collected data of readmission rate and emergency visits of discharge patients in three periods a prehotline ...

Journal of the College of Physicians and Surgeons Pakistan, 2019

In psychiatry, agitated / aggressive patients are often treated with de-escalation techniques. If... more In psychiatry, agitated / aggressive patients are often treated with de-escalation techniques. If this does not work, physical or chemical restrains are required; but in the event of resistance, seclusion is applied. We report the findings of baseline study of experiences of physical and chemical restraints in a tertiary care hospital in Karachi, where 104 files were evaluated retrospectively. The mean age of patients was 32.5 ±14.3 years with 54.8% men, while the average length of stay was 11.5 ±9.3 days. Agitation, violent behaviour, and aggression were the most common indications for restraints. In total, 94.5% of patients had both physical and chemical restraints with the latter being used as the first choice in 70 patients; whereas, 67.1% of patients' families were not informed before application of restraints. The seclusion need assessment was conducted in 4.1% of patients.

British journal of haematology, Jul 25, 2017

Rituximab is an effective therapy resulting in a platelet count improvement in 60% of patients wi... more Rituximab is an effective therapy resulting in a platelet count improvement in 60% of patients with immune thrombocytopenia (ITP). Rituximab depletes B cells; thus, a reduction in platelet autoantibody levels would be anticipated in patients who achieve a clinical response to this treatment. The objectives of this study were to determine whether rituximab was associated with a reduction in platelet autoantibody levels, and to correlate the loss of autoantibodies with the achievement of a treatment response. We performed a case-control study nested within a previous randomized controlled trial of standard therapy plus adjuvant rituximab or placebo. We measured platelet-bound anti-glycoprotein (GP) IIbIIIa and anti-GPIbIX using the antigen capture test. Of 55 evaluable patients, 25 (45%) had a detectable platelet autoantibody at baseline. Rituximab was associated with a significant reduction in anti-GPIIbIIIa levels (P = 0·02) but not anti-GPIbIX levels (P = 0·51) compared with placeb...

Transfusion, May 12, 2016

Cultured megakaryocytes could prove useful in the study of human diseases, but it is difficult to... more Cultured megakaryocytes could prove useful in the study of human diseases, but it is difficult to produce sufficient numbers for study. We describe and evaluate the use of an expansion process to develop mature megakaryocytes from peripheral blood-derived human hematopoietic stem and progenitor cells (HSPCs). HSPCs (CD34+) were isolated from peripheral blood by positive selection and expanded using an optimal CD34+ expansion supplement. We evaluated megakaryocyte growth, maturation, and morphology in response to thrombopoietin (TPO) stimulation using flow cytometry and electron microscopy. TPO demonstrated a dose-dependent stimulatory effect on both megakaryocyte number and maturation. From 90 to 120 mL of unmanipulated peripheral blood, we isolated a mean of 1.5 × 10(5) HSPCs (1.5 × 10(3) cells/mL of whole blood). HSPCs expanded nine-fold after a 4-day culture using an expansion supplement. Expanded cells were cultured for an additional 8 days with TPO (20 ng/mL), which resulted in...